Synthesis and mechanical/magnetic properties of nano-grained iron-oxides prepared with an inert gas condensation and pulse electric current sintering process

Yong Ho Choa; Tatachika Nakayama; Tohru Sekino; Koichi Niihara

doi:10.1007/BF03026043

Synthesis and mechanical/magnetic properties of nano-grained iron-oxides prepared with an inert gas condensation and pulse electric current sintering process

Yong Ho Choa, Tatachika Nakayama, Tohru Sekino, Koichi Niihara

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

3 Citations (Scopus)

Abstract

Nanocrystalline iron-oxide powder was fabricated with an inert gas condensation (IGC) method combined with evaporation, and in-situ oxidation techniques. The particle size of iron-oxide powder was controlled by varying the helium gas pressure between 0.1 and 10 Torr, with the smallest one ≈10 nm at 0.1 Torr. The nanostructure was characterized by TEM. Nanocrystalline iron-oxide powder was sintered with the pulse electric current sintering (PECS) method to obtain densified γ-Fe₂O₃ materials, and suitably densified nano-grained γ-Fe₂O₃ materials (≈ 40 nm) of great hardness were obtained. The correlation between the nanostructure and magnetic properties of nanocrystalline powder and densified γ-Fe₂O₃ materials was also investigated.

Original language	English
Pages (from-to)	135-139
Number of pages	5
Journal	Metals and Materials International
Volume	5
Issue number	2
DOIs	https://doi.org/10.1007/BF03026043
Publication status	Published - 1999 Apr
Externally published	Yes

Keywords

Inert gas condensation method
Magnetic property
Mechanical property
Nanostructure
Pulse electric current process

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/BF03026043

Cite this

@article{965502adc87c4479940bed097e467249,

title = "Synthesis and mechanical/magnetic properties of nano-grained iron-oxides prepared with an inert gas condensation and pulse electric current sintering process",

abstract = "Nanocrystalline iron-oxide powder was fabricated with an inert gas condensation (IGC) method combined with evaporation, and in-situ oxidation techniques. The particle size of iron-oxide powder was controlled by varying the helium gas pressure between 0.1 and 10 Torr, with the smallest one ≈10 nm at 0.1 Torr. The nanostructure was characterized by TEM. Nanocrystalline iron-oxide powder was sintered with the pulse electric current sintering (PECS) method to obtain densified γ-Fe2O3 materials, and suitably densified nano-grained γ-Fe2O3 materials (≈ 40 nm) of great hardness were obtained. The correlation between the nanostructure and magnetic properties of nanocrystalline powder and densified γ-Fe2O3 materials was also investigated.",

keywords = "Inert gas condensation method, Magnetic property, Mechanical property, Nanostructure, Pulse electric current process",

author = "Choa, {Yong Ho} and Tatachika Nakayama and Tohru Sekino and Koichi Niihara",

year = "1999",

month = apr,

doi = "10.1007/BF03026043",

language = "English",

volume = "5",

pages = "135--139",

journal = "Metals and Materials International",

issn = "1598-9623",

publisher = "Korean Institute of Metals and Materials",

number = "2",

}

TY - JOUR

T1 - Synthesis and mechanical/magnetic properties of nano-grained iron-oxides prepared with an inert gas condensation and pulse electric current sintering process

AU - Choa, Yong Ho

AU - Nakayama, Tatachika

AU - Sekino, Tohru

AU - Niihara, Koichi

PY - 1999/4

Y1 - 1999/4

N2 - Nanocrystalline iron-oxide powder was fabricated with an inert gas condensation (IGC) method combined with evaporation, and in-situ oxidation techniques. The particle size of iron-oxide powder was controlled by varying the helium gas pressure between 0.1 and 10 Torr, with the smallest one ≈10 nm at 0.1 Torr. The nanostructure was characterized by TEM. Nanocrystalline iron-oxide powder was sintered with the pulse electric current sintering (PECS) method to obtain densified γ-Fe2O3 materials, and suitably densified nano-grained γ-Fe2O3 materials (≈ 40 nm) of great hardness were obtained. The correlation between the nanostructure and magnetic properties of nanocrystalline powder and densified γ-Fe2O3 materials was also investigated.

AB - Nanocrystalline iron-oxide powder was fabricated with an inert gas condensation (IGC) method combined with evaporation, and in-situ oxidation techniques. The particle size of iron-oxide powder was controlled by varying the helium gas pressure between 0.1 and 10 Torr, with the smallest one ≈10 nm at 0.1 Torr. The nanostructure was characterized by TEM. Nanocrystalline iron-oxide powder was sintered with the pulse electric current sintering (PECS) method to obtain densified γ-Fe2O3 materials, and suitably densified nano-grained γ-Fe2O3 materials (≈ 40 nm) of great hardness were obtained. The correlation between the nanostructure and magnetic properties of nanocrystalline powder and densified γ-Fe2O3 materials was also investigated.

KW - Inert gas condensation method

KW - Magnetic property

KW - Mechanical property

KW - Nanostructure

KW - Pulse electric current process

UR - http://www.scopus.com/inward/record.url?scp=0039446000&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0039446000&partnerID=8YFLogxK

U2 - 10.1007/BF03026043

DO - 10.1007/BF03026043

M3 - Article

AN - SCOPUS:0039446000

SN - 1598-9623

VL - 5

SP - 135

EP - 139

JO - Metals and Materials International

JF - Metals and Materials International

IS - 2

ER -

Synthesis and mechanical/magnetic properties of nano-grained iron-oxides prepared with an inert gas condensation and pulse electric current sintering process

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this