Kinetic analysis of Al3Ti intermetallic powder after mechanical treatment in hydrogen

被引：5

作者：

Illekova, Emilia ^{[1
]}

Svec, Peter

Wexler, David

Calka, Andrzej

机构：

[1] Slovak Acad Sci, Inst Phys, Bratislava 84511, Slovakia

[2] Univ Wollongong, Fac Engn, Wollongong, NSW 2522, Australia

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2007年 / 353卷 / 18-21期

基金：

澳大利亚研究理事会;

关键词：

mechanical alloying; crystallization; nanocrystals; electron diffraction/scattering; X-ray diffraction; TEM/STEM; powders; nanoparticles; calorimetry;

D O I：

10.1016/j.jnoncrysol.2007.01.061

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present results of mechanochemical processing experiments performed on intermetallic powder, Al3Ti milled under hydrogen and helium atmospheres using a magnetically controlled Uniball device. Milling products were investigated by X-ray diffractometry (XRD), transmission electron microscopy (TEM) and advanced differential thermal analysis (DTA and DSC). Milling in both H-2 and in He resulted in breakdown of the intermetallic structure and, after extended milling, formation of nanostructural products comprising, predominately, a solid solution of Ti in fcc Al, with some possible additional Al1+x,Ti1-x (x = 0.3) phase. Detailed kinetic analysis was preformed on the Al3Ti sample milled for 6 days in hydrogen. Under isothermal annealing, the crystallization of the Al5Ti2 was found to follow the JMA kinetics, with constant activation energy E-* and Avrami exponent n decreasing from 2.5 to 1.5. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1970 / 1974

页数：5

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