XAFS and XRD studies on local and long-range structures of mechanically alloyed AlxTi1-x solid solutions

被引：2

作者：

Wen, C ^{[1
]}

Yasue, K

Wei, SQ

Hu, TD

Oyanagi, H

机构：

[1] Beijing Univ Aeronaut & Astronaut, Dept Mater Sci & Eng, Beijing 100083, Peoples R China

[2] Natl Ind Res Inst Nagoya, Dept Mat Proc, Kita Ku, Nagoya, Aichi 4628510, Japan

[3] Electrotech Lab, Tsukuba, Ibaraki 305, Japan

[4] Beijing Synchrotron Radiat Fac, Beijing 100039, Peoples R China

来源：

JOURNAL OF SYNCHROTRON RADIATION | 1999年 / 6卷

关键词：

XAFS; AlxTi1-x; mechanical alloying;

D O I：

10.1107/S0909049598018123

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Local and long-range structures of mechanically alloyed AlxTi1-x alloys milled for 360 ks have been studied by XAFS and XRD. The XAFS results clearly show that there are similar radial distribution functions for Al0.10Ti0.90 and Al0.50Ti0.50 alloys. The Ti-Ti coordination number is 10.0 and 8.5 for Al0.10Ti0.90 and Al0.50Ti0.50 alloys, respectively. The Ti atoms in the Al0.50Ti0.50 alloy favor to be coordinated by Ti atoms in the first shell. The XRD results suggest that after milled for 360 ks the AlxTi1-x alloys form mixed phases of amorphous state and hcp Ti(Al)(ss) solid solution for x = 0.10 and 0.50, and a single phase of fee Al(Ti)(ss) solid solution for x = 0.75. The XRD result is in good agreement with that from XAFS. We propose that the mechanical alloying with a low power can drive the first nearest neighbor coordination around Ti atoms to produce a large defect, and extend AlxTi1-x amorphous alloy range to a lower Al concentration x = 0.10.

引用

页码：725 / 727

页数：3