Log In
Sign Up
Romania
Citizenship:
Romania
Ph.D. degree award:
1998
Mr.
Ionel
Chicinas
Dr.
Professor
-
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Researcher | Teaching staff | Scientific reviewer
>20
years
Web of Science ResearcherID:
http://www.researcherid.com/rid/A-5139-2009
Personal public profile link.
Curriculum Vitae (21/04/2024)
Expertise & keywords
mechanical alloying/milling
powder metallurgy
Materials characterisation
Soft/hard magnetic materials
Spark plasma sintering
Magnetism
X-ray diffraction
Scanning electron microscopy
DTA, DSC, TG
nanocrystalline/nanocomposite materials
SEM+X-ray Microanalysis
rapid quenching
Projects
Publications & Patents
Entrepreneurship
Reviewer section
Balance between magnetic properties and electrical properties in soft magnetic composites powders and sintered compacts
Call name:
P 4 - Proiecte de Cercetare Exploratorie, 2020
PN-III-P4-ID-PCE-2020-2264
2021
-
2023
Role in this project:
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Affiliation:
Project website:
https://neamtubogdan.wixsite.com/magelectsmc
Abstract:
The main goal of the project is the obtaining of new soft magnetic composites (SMC) with improved properties which could be used like magnetic cores at medium and high frequencies. Innovative idea is to replace in SMC the non-magnetic dielectric (polymer, used in classical SMC) with a magnetic dielectric (magnetic ferrite). The project is structured on three directions (objectives): (i) obtaining of nanocrystalline/nanostructured SMC powders, (ii) obtaining the nanocomposite compacts by spark plasma sintering and by cold sintering in order to preserve the phases composition and nanocrystalline state and (iii) study the balance between magnetic and electrical properties of the SMC sintered compacts. The powders will be produce by: (a) milling of mixture of alloy (ductile) and ferrite powders (brittle) to obtain the nanocomposite particles like “raisin bread” model, (b) micro-alloying between the large particles of magnetic alloy surrounded by nanosized ferrite particles (pseudo core-shell particles) and (c) obtaining by chemical method the core-shell powders (core – iron, shell - Fe3O4). The proposed research aims to optimize the microstructure influence on the magnetic coupling and electrical resistivity in nanocomposite powders and sintered compacts. The balance between magnetic and electric properties in correlation with structure/microstructure and interphase studies will be shown by a diagram of the Saturation (and/or Permeability) - Electrical resistivity.
Read more
Cold sintered soft magnetic composites based on amorphous ferromagnetic fibres
Call name:
P 4 - Proiecte de Cercetare Exploratorie, 2020
PN-III-P4-ID-PCE-2020-0175
2021
-
2023
Role in this project:
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Affiliation:
Project website:
https://neamtubogdan.wixsite.com/cs-fsmc
Abstract:
The aim of this project is to develop a new family of soft magnetic composites (SMC’s) that is Fibres based Soft Magnetic Composites (FSMC’s). The main idea consists in the replacement of ferromagnetic particles (that are generally used for SMC’s preparation) by long and thin amorphous Fe-based and Co-based fibres. This new family of materials should have lower core losses as compared to magnetic cores based on Fe-Si laminates and higher magnetic permeability as compared to SMC’s. Amorphous Fe-based and Co-based fibres are commercially available being produced in our country also. The amorphous fibres will be covered by a ceramic insulating layer via hydrothermal techniques and then subjected to cold sintering. Several ceramic coatings such as SiO2, MgO, ZrO2, MoO3, BaTiO3, BaMoO4, etc. are considered. These compounds were selected because they can be easily produced/deposed via the hydrothermal method and they can also be cold sintered. Both techniques are extensively studied nowadays and are considered environmentally friendly. The influence of the hydrothermal parameters on the characteristics of the resulted ceramic coating (thickness, continuity, adherence, thermal stability, etc.) will be investigated. This project aims to develop two new concepts in the field of SMC’s: (i) the development of a new family of SMC’s - Fibres based Soft Magnetic Composite based on amorphous fibre (FSMC’s); (ii) the use of cold sintering process to prepare SMC’s.
Read more
Bonded 3D Printed Spring Magnets with Complex Geometries
Call name:
P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-4696
2020
-
2022
Role in this project:
Coordinating institution:
UNIVERSITATEA BABES BOLYAI
Project partners:
UNIVERSITATEA BABES BOLYAI (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Affiliation:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Project website:
http://B3DPSM.granturi.ubbcluj.ro
Abstract:
Permanent magnets (PM) are ubiquitous. It estimated that the average person owns around 200 PMs, however he or she is often blissfully unaware of this fact, in large part due to the huge advances in magnet technology, which have dramatically increased the energy per unit volume (the energy product, (BH)max) which can be stored in these materials. High performance PMs are found nearly everywhere, from simple devices, to modern ultra-portable high-tech electronics, to cutting edge eco-solutions.
Spring magnets are a nanocomposite material, in which the high anisotropy of a hard magnetic phase (Nd2Fe14B, SmCo5 etc.) stiffens the large magnetic moment of a soft magnetic phase (Fe) through the exchange interaction. These nanocomposites are predicted to be able to store twice the energy density of modern PM. While much progress was made in their development, nanocomposites with aligned microstructures have not been usefully produced. To address this problem we do not propose to try and compete in the bulk magnet market (aligned magnets), but in the bonded magnet (isotropic) market, which makes up a significant part of the PM market.
Bonded magnets are generally used for applications where specific magnetic field geometries are required i.e. magnets with complicated shapes. However, the main drawback of bonded magnets is the fact that a large volume fraction of the material is taken up by the binder, which means that the energy products are expectedly low. Therefore, the energy product enhancement of exchange coupled nanocomposite powders is a good path to mitigation of this downside.
The project aims to develop a new type of extruded bonded magnet filament, containing exchange coupled nanocomposites, which can be used in commercial 3D printers. We also propose to produce 3D printed magnets using our filaments, in order to produces bonded magnets with special magnetic field geometries.
Read more
Alloy/oxide type composite magnetic cores for energy efficient applications in electromagnetic devices
Call name:
P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2019-3763
2020
-
2022
Role in this project:
Key expert
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Affiliation:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Project website:
https://traianmarinca.wixsite.com/300ped
Abstract:
The scope of the project is to obtain soft magnetic composite – SMC materials based on alloy (Supermalloy and Sendust)/oxide (mainly spinel ferrites) composite powder and use them for production of magnetic cores that can work in frequencies for energy efficient electromagnetic applications. The specific applications that is envisaged for these magnetic materials are magnetic cores that can be used in transformers/inductors for energy/power conversion. The product is falls in line with the tremendous trend for miniaturisation and energy saving, increasing the energetic efficiency. The project proposes two types of magnetic cores: a composite sintered one - oxide matrix with metallic clusters embedded and a polymeric matrix one using metallic@oxide composite powder. The project will be developed by a multidisciplinary research team involving materials science and engineering specialists, chemist and electrical engineers. The synthesis of the magnetic cores involves the preparation of composite powder of alloy@oxide, double layered composite particles allloy@oxide@polimer and composite powder compaction/densification, especially by spark plasma sintering. The composite magnetic cores will be tested in frequencies, energy efficiency will be tested (magnetic losses), will be characterised from structural, microstructural, thermal stability, electric and magnetic point of views.
Read more
Soft magnetic cores via powder metallurgy. Technology development and implementation
Call name:
P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0365
2016
-
2018
Role in this project:
Project coordinator
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); NAPOSINT PRODCOM S.R.L. (RO)
Affiliation:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Project website:
http://www.sim.utcluj.ro/contracte/PN-III-P2-2.1-BG-2016-0365/
Abstract:
The project theme is linked to the need of the industrial partner to expand its sintered products range by implementing soft magnetic cores in production. The research within this project will focus on the next areas:
A. Research on the production of soft magnetic cores from Fe-P powder, with imposed electric and magnetic characteristics. Fe-P powder will be produced by two ways: (i) mechanically activated PASC powder by mechanical milling and (ii) composite particles obtained by mechanical milling of the Ferrophosphorus-Fe (ASC100.29) powder mixture with the desired P content. Composite particles, consisting of brittle ferrophosphorus particles embedded in a ductile Fe matrix, will be prepared by wet or dry mechanical milling. Compacts will be produced using composite, activated and inactivated Fe-P powders.
B. Development of experimental models of magnetic cores made by Fe-P powder with outstanding functional performance in AC regime at frequencies up to 200 Hz. Technological itinerary: compaction-sintering-calibration-annealing.
C. Implementing the technology for modern, competitive, low-cost magnetic cores using powder metallurgy methods for the industrial partner.
Several parameters of the milling process will be investigated: type (dry or wet), duration, atmosphere etc. The as-obtained Fe-P powders will be studied by: granulometry, morphology, chemical composition, structure, microstructure and technological properties. In the compaction process, several aspects will be carefully analysed: pressability, lubricant, green strength and density. Sintering experiments will aim to establish the optimal parameters: temperature, duration and atmosphere. The optimal parameters for annealing will be determined: atmosphere, duration and temperature. The magnetic cores will be characterised by density, dimensional change, microstructure, the parameters of the magnetic hysteresis curve, the eddy current loss, the Curie temperature, electrical resistivity, etc.
Read more
New technology of iron content reduction from quartz sands by magnetic separation
Call name:
P 2 - SP 2.1 - Transfer de cunoaștere la agentul economic „Bridge Grant”
PN-III-P2-2.1-BG-2016-0214
2016
-
2018
Role in this project:
Key expert
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); MINESA INSTITUTUL DE CERCETARI SI PROIECTARI MINIERE SA (RO)
Affiliation:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Project website:
http://www.sim.utcluj.ro/contracte/PN-III-P2-2.1-BG-2016-0214/
Abstract:
The problem of separating materials, no matter the field is a universal one. Common separation methods are: flotation, flocculated sedimentation or centrifugation, filtration, but when we deal with magnetic particles, the magnetic separation became an ecological option. The development of the magnetic separators is limited by the complexity of the magnetic field design and material feed aspects. The proposed method consist in a grinding of material, followed by a draying sequence and finally by magnetic separation using a new designed field configuration. The magnetic field configuration will be used to small iron contend (now it is used to higher iron content, more than 10 %) and to particles with very low magnetism. The research propose the development of an innovating technology, technology that will allow the reduction of the iron content from the quartz sand from 0.5 – 0.2 % below 0.09 % by classic magnetic separation or combined magnetic separation. The problem raised recently when the conditions for the glass production became more sever and the existing sand didn’t fulfilled the demands. In the view of this existing situation the project has the followings objectives: obtaining of quartz sand with low iron content in glass industry and innovative combined technology development (milling, drying, magnetic separation) for magnetic separation of iron from the quartz sand. Another aspect of the project consist in development of a combined method to reuse the so-called sterile from the mining activities (tailing ponds). The posed problem reflect the possibility to efficient recover the beneficial elements from such reserves and will bring several advantage for the mining industry: the efficiency increase, separation of particles with low magnetism, ecological care (reduction of magnitude of the tailings ponds).
Read more
High magnetic flux density sintered magnetic cores produced from pseudo core-shell/core-shell powders for medium to high frequencies applications
Call name:
P 2 - SP 2.1 - Proiect experimental - demonstrativ
PN-III-P2-2.1-PED-2016-1816
2017
-
2018
Role in this project:
Project coordinator
Coordinating institution:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA
Project partners:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)
Affiliation:
UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO)
Project website:
http://www.sim.utcluj.ro/contracte/PN-III-P2-2.1-PED-2016-1816/
Abstract:
Soft magnetic composite materials of ferrite/alloy type comes to complete the uncovered range of applications by the classical magnetic alloys: Fe based and Ni based magnetic alloys, magnetic ferrites, i.e. medium and high frequencies applications that needs a high magnetic density. The project has as starting point a project coordinator patent pending, related to pseudo-core shell powder of Fe@NiFe2O4 type and its synthesis procedure. The main goal of the project is to elaborate a laboratory technology and obtaining an experimental model of sintered magnetic core with imposed functional characteristics, obtained by spark plasma sintering of pseudo core-shell/core-shell powder elaborated in the project. The pseudo core-shell powder are formed by large Fe particles that are covered by thin layer of nanometric soft magnetic ferrite particles. The pseudo core-shell powder will be obtained according to the patent pending (mixture of large Fe particles covered by ferrite nanoparticles + heat treatments) and the core-shell powder will be obtained by chemical method. By spark plasma sintering will be synthesized composite compacts having a structure of large ferromagnetic particles (high magnetic density) covered by a layer of ferrites, which will determinate high electrical resistivity of the magnetic core and low magnetic losses by eddy currents. The correlation between the magnetic and electrical characteristics as a function of pseudo-core shell powder characteristics and spark plasma sintering parameters for optimising the process. At the end, among the best composite magnetic material obtained will be realise an experimental model of magnetic core with imposed functional characteristics and will be elaborate the documentation for the laboratory technology for obtaining magnetic cores. The composite magnetic cores elaborated in this way could be used in medium and high frequencies having superior magnetic characteristics as compared to the ferrites.
Read more
Spark plasma sintered soft magnetic composite/nanocomposite compacts of iron alloy/iron mixed ferrite type
Call name:
Projects for Young Research Teams - TE-2012 call
PN-II-RU-TE-2012-3-0378
2013
-
2016
Role in this project:
Key expert
Coordinating institution:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA
Project partners:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Affiliation:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Project website:
http://www.imm.utcluj.ro/contracte/PN-II-RU-TE-2012-3-0378/
Abstract:
The main goals of this project are the synthesis of new soft magnetic compacts next to the building of a new young research team. The synthesis of new soft magnetic materials with good magnetic permeability, large magnetic induction and high electrical resistivity, which could work in middle/high frequencies, is envisaged. These will be obtained by combining the iron alloys with soft magnetic iron mixed ferrites. Composite and nanocomposite materials, powders and compacts will be synthesized by combining various techniques such as mechanosynthesis, classical sintering and spark plasma sintering. The new iron alloy/iron mixed ferrite composite materials could combine the electrical and magnetic properties of the components phases, resulting, thus, higher electrical resistivity as compared to the iron alloy and increased saturation induction and magnetic permeability as compared to the iron mixed spinel ferrites. These will lead to lower eddy current losses when the composite compacts are used in frequencies application. A very important aspect proposed in this project is the synthesis of the nanocomposite iron alloy/iron mixed ferrite type compacts from nanocomposite powders. The synthesis of this type of compacts is expected to lead to an important increase of the electrical resistivity and better magnetic permeability, assured by nanocrystalline state.
Read more
Amorphous soft magnetic Fe-based and Co-based powders and cores prepared by mechanical alloying and spark plasma sintering
Call name:
Projects for Young Research Teams - TE-2012 call
PN-II-RU-TE-2012-3-0367
2013
-
2016
Role in this project:
Key expert
Coordinating institution:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA
Project partners:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Affiliation:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Project website:
http://www.imm.utcluj.ro/contracte/PN-II-RU-TE-2012-3-0367/
Abstract:
The proposed research, aim to find a new approach to the preparation of amorphous Fe-based and Co-based soft magnetic powders and compacts eliminating, as much as possible, the main drawbacks of the classically prepared soft magnetic amorphous materials. The amorphous powders will be prepared by mechanical alloying. Their structural magnetic, electric, thermic characteristics will be investigated and correlated with preparation conditions. Optimisation of the mechanosynthesis process by studies concerning the influence of milling conditions (wet or dry milling, speed ratio between vials and support disk, ball to powder ratio) on the powder amorphisation and their characteristics will be performed. The substitution of B and Si by different amount of Zr and/or Ti in the (Fe, Co, Ni)75 – (B, Si)25 systems will lead to a new system to be investigate: (Fe, Co, Ni)75 – (Zr, Ti)x - (B, Si)25-x. The influence of B and Si substitution by different amount of Zr and/or Ti on structure, microstructure, magnetic characteristics, and thermal stability of the alloys will be investigated. The Fe-based and Co-based powders characterised by highest saturation magnetisation, highest permeability, lowest coercivity, highest electrical resistivity and widen supercooled liquid region will be compacted by spark plasma sintering. This technique will allow us to prepare high density amorphous soft magnetic compacts conserving the magnetic characteristics of sintered amorphous powders.
Read more
Soft magnetic nanocrystalline/nanostructured powders and compacts obtained by mechanosynthesis and spark plasma sintering
Call name:
Exploratory Research Projects - PCE-2012 call
PN-II-ID-PCE-2012-4-0632
2013
-
2016
Role in this project:
Project coordinator
Coordinating institution:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA
Project partners:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Affiliation:
UNIVERSITATEA TEHNICA CLUJ-NAPOCA (RO)
Project website:
http://www.imm.utcluj.ro/contracte/PN-II-ID-PCE-2012-4-0632/
Abstract:
Nanocrystalline/nanostructured magnetic materials have interesting soft magnetic properties in the view of fundamental research and industry applications. The main goal of this project is the obtaining of new nanocrystalline/nanocomposite soft magnetic materials with improved properties which could be used like magnetic cores at medium and high frequencies. The project is structured on two directions: (i) obtaining of nanocrystalline/nanostructured powders and sintered compacts
like Permalloy(Supermalloy)/Rhometal type and (ii) obtaining of nanocomposite powders and compacts by combining the high permeability/remanence of Fe, Fe-Ni alloy with high electrical
resistivity of ferrite - (Me1Me2)Fe2O4/(Fe-Ni alloy). Two types of nanocomposite powders are envisaged: (i) the nanocomposite particles like “raisin bread” model, obtained by milling of Fe-based alloys (ductile) and ferrite powders (brittle) and (ii) a core-shell type particles obtained by microalloying between the large particles of alloy surrounded by many nanosized ferrite particles.
The nanocomposite/nanostructured powders will be compacted by spark plasma sintering to preserve the phases composition and nanocrystalline state. The proposed research aims to optimize the microstructure influence on the magnetic coupling and electrical resistivity in nanocomposite powders and sintered compacts. The electric conduction at the nanocomposite level with very different electric conduction phases will be studied as well.
Read more
FROM MICRO TO MACRO - CONTINUUM SCALE MODELING OF ADVANCED MATERIALS IN VIRTUAL FABRICATION
Call name:
Complex Exploratory Research Projects - PCCE-2008 call
PN-II-ID-PCCE-2008-0100
2010
-
2013
Role in this project:
Partner team leader
Coordinating institution:
Universitatea Tehnica din Cluj Napoca, CENTRUL DE CERCETARE IN TEHNOLOGIA DEFORMARII TABLELOR
Project partners:
Universitatea Tehnica din Cluj Napoca, CENTRUL DE CERCETARE IN TEHNOLOGIA DEFORMARII TABLELOR (RO); Universitatea Tehnica din Cluj Napoca, LABORATOR DE MICROSCOPIE ELETRONICA (RO); Universitatea Tehnica din Cluj Napoca, LABORATOR DE STIINTA MATERIALELOR, FILME SUBTIRI (RO); Universitatea Tehnica din Cluj Napoca, CENTRUL DE CERCETAREIN PRELUCRAREA IMAGINILOR SI RECUNOASTEREA FORMELOR (RO); Institutul de Matematica Simion Stoilov al Academiei Romane (RO); Universitatea din Bucuresti (RO)
Affiliation:
Universitatea Tehnica din Cluj Napoca, LABORATOR DE MICROSCOPIE ELETRONICA (RO)
Project website:
http://www.comod.utcluj.ro
Abstract:
The purpose of the project consists in the development material models at microscopic scale and their transfer to macroscopic scale by implementation in computer programmes for the simulation of sheet metal forming processes. In order to achieve this purpose, four objectives have been defined. The first objective consists in the experimental characterization of the materials selected for testing at micro- and macro-level. By achieving this objective, a database referring to the plastic behaviour of the tested materials will be created. The second objective consists in the development of plasticity models at micro- and macro-level. By achieving this objective, the members of the consortium will have a set of realistic and robust plasticity models able to describe the anisotropic behaviour of materials. The third objective consists in the implementation of the previously developed models in computer programmes for the simulation of the sheet metal forming processes. By achieving this objective, the consortium will have a set of robust and efficient computer programmes for the numerical simulation of hydraulic bulging, deep-drawing of cylindrical parts and prediction of the forming limit curves. The last objective of the project consists in the experimental validation the simulation programmes previously elaborated. By achieving this objective, a set of simulation programmes having a high accuracy will be available for the use in industrial applications with the aim of obtaining a realistic and robust virtual prototype. The achievement of the general purpose needs the cooperation between experts from interdisciplinary domains and having a rich expertise in modelling, numerical methods, experimental procedures, with a comprehensive understanding of the phenomena that occur at micro- and macroscopic scale. With this aim in view, an interdisciplinary and complementary consortium as concerns the scientific background and the laboratory equipment has been established.
Read more
Reserches on synthesis of spark plasma sintered nanocomposite compacts of Permalloy/Fe-Si type using mechanically alloyed powders
Call name:
Programul de actiuni Integrate Romania-Franta (bilaterale)
PN-II-CT-RO-FR-2012-1-0056
2012
-
Role in this project:
Project coordinator
Coordinating institution:
Universitatea Tehnica din Cluj-Napoca
Project partners:
Universitatea Tehnica din Cluj-Napoca (RO)
Affiliation:
Project website:
Abstract:
Proiectul este dedicat obţinerii şi caracterizării de pulberi nanocristaline/nanometrice magnetic moi şi totodată obţinerii de compacte magnetice nanocomposite. Se urmăreşte obţinerea prin mecanosinteză de pulberi nanocristaline/nanometrice din sistemul Fe-Si pornind de la pulberi elementale de Fe şi Si, precum şi caracterizarea proprietăţilor acestora. Pulberile astfel obţinute vor fi utilizate pentru obţinerea compactelor nanocompozite de tipul Permalloy/Fe-Si prin omogenizare/măcinare mecanică urmata de sinterizare in plasma (Spark Plasma Sintering - SPS). Pentru obţinerea acestor compacte pulberile nanocristaline cu granulaţie fină de Fe-Si vor fi omogenizate/măcinate cu pulberi nanocristaline de Permalloy cu granulaţie mare, astfel încât particulele din pulbere de Permalloy să fie înconjurate cu particule fine de Fe-Si. În urma sinterizării materialul va consta dintr-o matrice continuă/cvasicontinuă de Fe-Si, cu rezistivitate ridicată, în care vor fi dispersate particule de Permalloy cu permeabilitate magnetică mai ridicată. Se urmăreşte astfel obţinerea de materiale nanocompozite de tipul Permalloy/Fe-Si care vor îmbina proprietăţilor magnetice şi electrice caracteristice aliajului Permalloy şi aliajelor Fe-Si. Se anticipează obţinerea unor compacte compozite cu o rezistivitate mai mare comparativ cu cea a aliajelor Permalloy şi cu o permeabilitate mai mare comparativ cu cea a aliajelor fier-siliciu.
Read more
FILE DESCRIPTION
DOCUMENT
List of research grants as project coordinator
Download (258.41 kb) 06/06/2017
List of research grants as partner team leader
Download (123.39 kb) 06/06/2017
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
Download (128.03 kb) 06/06/2017
R&D activities in enterprises
Peer-review activity for international programs/projects
Download (101.76 kb) 06/06/2017
[T: 0.7423, O: 307]