Spontaneous alloying in nanometer-sized ultra-fine particles

被引：9

作者：

Mori, H ^{[1
]}

Yasuda, H ^{[1
]}

机构：

[1] Osaka Univ, Ultra High Voltage Electron Microscopy Res Ctr, Suita, Osaka 565, Japan

来源：

MECHANICALLY ALLOYED, METASTABLE AND NANOCRYSTALLINE MATERIALS, PART 1 | 1998年 / 269-2卷

关键词：

nanometer-sized ultra-fine particle; spontaneous alloying; transmission electron microscopy;

D O I：

10.4028/www.scientific.net/MSF.269-272.327

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The alloying behavior in nanometer(nm)-sized particles has been studied by transmission electron microscopy (TEM). When solute atoms are vapor-deposited onto nm-sized particles kept at room temperature, rapid dissolution of solute atoms into particles takes place and solid solution or compound particles are successfully formed. Such spontaneous alloying occurs even between nm-sized particles of different elements. Results can be summarized as follows. (1) Spontaneous alloying takes place via a solid-state process. (2) Spontaneous alloying becomes more difficult with increasing particle size. (3) Spontaneous alloying is not an artifact originating from the temperature rise in particles which might be induced by the heat of condensation. (4) The critical size of initial particles below which alloy particles are successfully formed by spontaneous alloying increases with increasing heat of alloy formation.

引用

页码：327 / 332

页数：6