Phase change of CoTi and Co3Ti induced by MeV-scale electron irradiation

被引：5

作者：

Anada, Satoshi ^{[1
]}

Zensho, Akihiro ^{[2
]}

Yasuda, Hidehiro ^{[1
,2
]}

Mori, Hirotaro ^{[1
]}

机构：

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

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Osaka, Japan

来源：

PHILOSOPHICAL MAGAZINE | 2016年 / 96卷 / 19期

关键词：

Irradiation effects; electron irradiation; phase transformations; solid phase reactions; in situ electron microscopy; transmission electron microscopy; intermetallic compounds; MECHANICALLY ALLOYED CO75TI25; TI; TRANSFORMATIONS; AMORPHIZATION; MICROSCOPES; TRANSITION; DISORDER; POWDERS; SYSTEM;

D O I：

10.1080/14786435.2016.1185187

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigates equilibrium-to-nonequilibrium solid phase transitions induced by MeV-scale electron irradiation in B2-CoTi and L1(2)-Co3Ti intermetallic compounds by means of high-voltage electron microscopy. Under MeV-scale electron irradiation, B2-CoTi transforms into a body-centered cubic solid solution through chemical disordering and eventually transforms into an amorphous phase. The critical temperature for amorphisation is found to be 110K. L1(2)-Co3Ti also exhibits chemical disordering at temperatures below 700K. However, its amorphisation does not occur even at a low temperature of 20K. The dominant factor in these solid phase transitions is discussed in terms of the Gibbs free energy.

引用

页码：2027 / 2039

页数：13

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