Preparation of Fe-Pt Powders from Ingot by a Simple and Cost-Effective Spark Erosion Device

Pelin Tozman; Yukiko Takahashi; Munuswamy Venkatesan; Lorena Monzon; Michael Coey; Orhan Kamer

doi:10.1002/crat.202200117

Preparation of Fe-Pt Powders from Ingot by a Simple and Cost-Effective Spark Erosion Device

Pelin Tozman^*, Yukiko Takahashi, Munuswamy Venkatesan, Lorena Monzon, Michael Coey, Orhan Kamer

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

FePt powders with 1 µm average particle size have been synthesized from bulk ingot with no need for cryogenic temperatures or conventional powder processing. This is achieved with a compact, cost-effective spark erosion device which is simple to assemble, with no need of a mechanical workshop. The as-synthesized powders show a disordered A1 phase with curie temperature, T_c = 300 °C. The effect of annealing on the transition from the disordered to the ordered phase and on the magnetic properties are investigated in situ by magnetic susceptibility measurements. The phase transition to the L1₀ phase (T_c = 445 °C) is complete at 630 °C where the coercivity increases from 0 to 0.3 T. A urther increase of the heating temperature has no effect on the magnetic and crystallographic properties.

Original language	English
Article number	2200117
Journal	Crystal Research and Technology
Volume	57
Issue number	11
DOIs	https://doi.org/10.1002/crat.202200117
Publication status	Published - 2022 Nov
Externally published	Yes

Keywords

FePt
coercivity
cost-effective powder processing
particle sizes
spark erosion
sustainability

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1002/crat.202200117

Cite this

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title = "Preparation of Fe-Pt Powders from Ingot by a Simple and Cost-Effective Spark Erosion Device",

abstract = "FePt powders with 1 µm average particle size have been synthesized from bulk ingot with no need for cryogenic temperatures or conventional powder processing. This is achieved with a compact, cost-effective spark erosion device which is simple to assemble, with no need of a mechanical workshop. The as-synthesized powders show a disordered A1 phase with curie temperature, Tc = 300 °C. The effect of annealing on the transition from the disordered to the ordered phase and on the magnetic properties are investigated in situ by magnetic susceptibility measurements. The phase transition to the L10 phase (Tc = 445 °C) is complete at 630 °C where the coercivity increases from 0 to 0.3 T. A urther increase of the heating temperature has no effect on the magnetic and crystallographic properties.",

keywords = "FePt, coercivity, cost-effective powder processing, particle sizes, spark erosion, sustainability",

author = "Pelin Tozman and Yukiko Takahashi and Munuswamy Venkatesan and Lorena Monzon and Michael Coey and Orhan Kamer",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors. Crystal Research and Technology published by Wiley-VCH GmbH.",

year = "2022",

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doi = "10.1002/crat.202200117",

language = "English",

volume = "57",

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AU - Tozman, Pelin

AU - Takahashi, Yukiko

AU - Venkatesan, Munuswamy

AU - Monzon, Lorena

AU - Coey, Michael

AU - Kamer, Orhan

PY - 2022/11

Y1 - 2022/11

N2 - FePt powders with 1 µm average particle size have been synthesized from bulk ingot with no need for cryogenic temperatures or conventional powder processing. This is achieved with a compact, cost-effective spark erosion device which is simple to assemble, with no need of a mechanical workshop. The as-synthesized powders show a disordered A1 phase with curie temperature, Tc = 300 °C. The effect of annealing on the transition from the disordered to the ordered phase and on the magnetic properties are investigated in situ by magnetic susceptibility measurements. The phase transition to the L10 phase (Tc = 445 °C) is complete at 630 °C where the coercivity increases from 0 to 0.3 T. A urther increase of the heating temperature has no effect on the magnetic and crystallographic properties.

AB - FePt powders with 1 µm average particle size have been synthesized from bulk ingot with no need for cryogenic temperatures or conventional powder processing. This is achieved with a compact, cost-effective spark erosion device which is simple to assemble, with no need of a mechanical workshop. The as-synthesized powders show a disordered A1 phase with curie temperature, Tc = 300 °C. The effect of annealing on the transition from the disordered to the ordered phase and on the magnetic properties are investigated in situ by magnetic susceptibility measurements. The phase transition to the L10 phase (Tc = 445 °C) is complete at 630 °C where the coercivity increases from 0 to 0.3 T. A urther increase of the heating temperature has no effect on the magnetic and crystallographic properties.

KW - FePt

KW - coercivity

KW - cost-effective powder processing

KW - particle sizes

KW - spark erosion

KW - sustainability

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Preparation of Fe-Pt Powders from Ingot by a Simple and Cost-Effective Spark Erosion Device

Abstract

Keywords

ASJC Scopus subject areas

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