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

被引：2

作者：

Choa, YH ^{[1
]}

Nakayama, T ^{[1
]}

Sekino, T ^{[1
]}

Niihara, K ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

METALS AND MATERIALS-KOREA | 1999年 / 5卷 / 02期

关键词：

nanostructure; inert gas condensation method; pulse electric current process; magnetic property; mechanical property;

D O I：

10.1007/BF03026043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 approximate to 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 gamma-Fe2O3 materials, and suitably densified nano-grained gamma-Fe2O3 materials (approximate to 40 nm) of great hardness were obtained. The correlation between the nanostructure and magnetic properties of nanocrystalline powder and densified gamma-Fe2O3 materials was also investigated.

引用

页码：135 / 139

页数：5

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