The purity evolution of Ti3AlC2 MAX phase synthesized by mechanochemical route: The effect of Al content and high-temperature annealing

被引:3
作者
Shahin, Nasir [1 ,3 ]
Heidarpour, Akbar [2 ]
Kazemi, Shahab [1 ]
机构
[1] Bu Ali Sina Univ, Fac Engn, Dept Mat Engn, Hamadan, Iran
[2] Hamedan Univ Technol, Dept Met & Mat Engn, Hamadan, Iran
[3] Bu Ali Sina Univ, Fac Engn, Dept Mat Engn, Hamadan 6517838695, Iran
关键词
high-temperature annealing; mechanochemical synthesis; nonstoichiometric milling; Ti3AlC2 MAX phase; MECHANICAL-PROPERTIES; TI; MICROSTRUCTURE; NANOCOMPOSITE; COMBUSTION; CARBIDE;
D O I
10.1002/eng2.12814
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
This study explores the effects of excess Al and annealing at high temperature on the purity of Ti3AlC2 MAX phase synthesized by the mechanochemical route. In this regard, a constant stoichiometric ratio of Ti: Al: C = 3: 1: 2 along with three blends of nonstoichiometric ratios with excess Al (Ti: Al: C = 3: X: 2, X = 1.1, 1.2, and 1.5) were ball milled. Then, to examine the annealing at high-temperature effects, the compacted ball-milled powders were heated at 900 and 1200 degrees C for 1 h. The phase identification revealed that 10 h of ball milling caused a reaction between the elemental powders, and Ti3AlC2 and TiC were formed. The mechanism of the reaction during the high-energy ball milling process is assigned to a mechanically induced self-propagating reaction. Addition of excess Al to primary powders caused to increase the purity of Ti3AlC2 significantly. Furthermore, annealing at high temperature leading to complete reactions of the ball-milled powders and increased Ti3AlC2 purity. The maximum Ti3AlC2 content of 88% was obtained of initial powder of Ti: Al: C = 3: 1.2: 2 ratio after annealing at 1200 degrees C.
引用
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页数:9
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