Influence of ferrite stabilizing elements and Co on structure and magnetic properties of carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet

Z. Karoly, J. Szépvölgyi, W. Kaszuwara, O. Łabędź, M. Bystrzejewski

Research output: Contribution to journalArticle

Abstract

The encapsulation of Fe nanoparticles in protective carbon coatings always leads to formation of undesired paramagnetic austenite phase. Various ferrite stabilizing elements were included in the synthesis process to verify whether their inclusion may minimize the austenite content in carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet. Eight ferrite stabilizing elements (Si, Al, Mo, Ti, Zr, Cr, W and V) and one austenite promoting additive (Co) were tested. Their influence on the synthesis yield, phase composition, morphology and magnetic properties of carbon-encapsulated iron nanoparticles was studied. It was found that the addition of ferrite stabilizers strongly influences the diameter distribution, graphitization degree, phase composition and magnetic properties. Contrary to the thermodynamic predictions the inclusion of ferrite stabilizing elements caused a substantial worsening of magnetic performance in carbon-encapsulated iron nanoparticles. It has been also shown that the subsequent heat treatment of carbon-encapsulated iron nanoparticles significantly improves their magnetic properties.

Original languageEnglish
Pages (from-to)592-600
Number of pages9
JournalJournal of Alloys and Compounds
Volume619
DOIs
Publication statusPublished - Jan 15 2015

Fingerprint

Plasma Gases
Plasma jets
Ferrite
Magnetic properties
Carbon
Iron
Nanoparticles
Austenite
Phase composition
Graphitization
Encapsulation
Heat treatment
Hot Temperature
Thermodynamics
Coatings

Keywords

  • Annealing
  • Austenite
  • Magnetic materials
  • Magnetic properties
  • Phase composition

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Influence of ferrite stabilizing elements and Co on structure and magnetic properties of carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet. / Karoly, Z.; Szépvölgyi, J.; Kaszuwara, W.; Łabędź, O.; Bystrzejewski, M.

In: Journal of Alloys and Compounds, Vol. 619, 15.01.2015, p. 592-600.

Research output: Contribution to journalArticle

@article{7497f57720cc41c1be407bd15bed3082,
title = "Influence of ferrite stabilizing elements and Co on structure and magnetic properties of carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet",
abstract = "The encapsulation of Fe nanoparticles in protective carbon coatings always leads to formation of undesired paramagnetic austenite phase. Various ferrite stabilizing elements were included in the synthesis process to verify whether their inclusion may minimize the austenite content in carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet. Eight ferrite stabilizing elements (Si, Al, Mo, Ti, Zr, Cr, W and V) and one austenite promoting additive (Co) were tested. Their influence on the synthesis yield, phase composition, morphology and magnetic properties of carbon-encapsulated iron nanoparticles was studied. It was found that the addition of ferrite stabilizers strongly influences the diameter distribution, graphitization degree, phase composition and magnetic properties. Contrary to the thermodynamic predictions the inclusion of ferrite stabilizing elements caused a substantial worsening of magnetic performance in carbon-encapsulated iron nanoparticles. It has been also shown that the subsequent heat treatment of carbon-encapsulated iron nanoparticles significantly improves their magnetic properties.",
keywords = "Annealing, Austenite, Magnetic materials, Magnetic properties, Phase composition",
author = "Z. Karoly and J. Sz{\'e}pv{\"o}lgyi and W. Kaszuwara and O. Łabędź and M. Bystrzejewski",
year = "2015",
month = "1",
day = "15",
doi = "10.1016/j.jallcom.2014.09.044",
language = "English",
volume = "619",
pages = "592--600",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Influence of ferrite stabilizing elements and Co on structure and magnetic properties of carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet

AU - Karoly, Z.

AU - Szépvölgyi, J.

AU - Kaszuwara, W.

AU - Łabędź, O.

AU - Bystrzejewski, M.

PY - 2015/1/15

Y1 - 2015/1/15

N2 - The encapsulation of Fe nanoparticles in protective carbon coatings always leads to formation of undesired paramagnetic austenite phase. Various ferrite stabilizing elements were included in the synthesis process to verify whether their inclusion may minimize the austenite content in carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet. Eight ferrite stabilizing elements (Si, Al, Mo, Ti, Zr, Cr, W and V) and one austenite promoting additive (Co) were tested. Their influence on the synthesis yield, phase composition, morphology and magnetic properties of carbon-encapsulated iron nanoparticles was studied. It was found that the addition of ferrite stabilizers strongly influences the diameter distribution, graphitization degree, phase composition and magnetic properties. Contrary to the thermodynamic predictions the inclusion of ferrite stabilizing elements caused a substantial worsening of magnetic performance in carbon-encapsulated iron nanoparticles. It has been also shown that the subsequent heat treatment of carbon-encapsulated iron nanoparticles significantly improves their magnetic properties.

AB - The encapsulation of Fe nanoparticles in protective carbon coatings always leads to formation of undesired paramagnetic austenite phase. Various ferrite stabilizing elements were included in the synthesis process to verify whether their inclusion may minimize the austenite content in carbon-encapsulated iron nanoparticles synthesized in thermal plasma jet. Eight ferrite stabilizing elements (Si, Al, Mo, Ti, Zr, Cr, W and V) and one austenite promoting additive (Co) were tested. Their influence on the synthesis yield, phase composition, morphology and magnetic properties of carbon-encapsulated iron nanoparticles was studied. It was found that the addition of ferrite stabilizers strongly influences the diameter distribution, graphitization degree, phase composition and magnetic properties. Contrary to the thermodynamic predictions the inclusion of ferrite stabilizing elements caused a substantial worsening of magnetic performance in carbon-encapsulated iron nanoparticles. It has been also shown that the subsequent heat treatment of carbon-encapsulated iron nanoparticles significantly improves their magnetic properties.

KW - Annealing

KW - Austenite

KW - Magnetic materials

KW - Magnetic properties

KW - Phase composition

UR - http://www.scopus.com/inward/record.url?scp=84907587694&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907587694&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2014.09.044

DO - 10.1016/j.jallcom.2014.09.044

M3 - Article

AN - SCOPUS:84907587694

VL - 619

SP - 592

EP - 600

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -