Spark plasma sintering of TiAl-Ti3AlC2 composite

被引：84
作者：
Akhlaghi, Maryam [1 ]
Tayebifard, Seyed Ali [1 ]
Salahi, Esmaeil [2 ]
Asl, Mehdi Shahedi [3 ]
机构：
[1] MERC, Semicond Dept, Karaj, Iran
[2] MERC, Dept Ceram, Karaj, Iran
[3] Univ Mohaghegh Ardabili, Dept Mech Engn, Ardebil, Iran
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷 / 17期
关键词：
Spark plasma sintering; Composite; TiAl; Ti3AlC2; Microstructure; Mechanical properties; IN-SITU COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEMPERATURE; PARTICLES; CERAMICS; ALLOYS;
D O I：
10.1016/j.ceramint.2018.08.272
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：
A TiAl-15 wt% Ti3AlC2 composite was fabricated by spark plasma sintering (SPS) method, using as-purchased Ti and Al powders as well as as-synthesized Ti3AlC2 MAX phase. Ti3AlC2 was synthesized via mechanically-activated self-propagating high-temperature synthesis of Ti, Al, and C powders in a tubular furnace. The mixture of Ti, Al and Ti3AlC2 was ball-milled and spark plasma sintered at 1000 degrees C for a dwell time of 15 min under an external pressure of 40 MPa in vacuum atmosphere. The microstructure and phase evolution as well as the mechanical properties of the as-sintered composite were studied. A relative density of similar to 95%, Vickers hardness of similar to 4.5 GPa, fracture toughness of 11.9 MPa m(1/2), and flexural strength of 336 MPa were obtained by such a low-temperature SPS route.
引用
收藏
页码：21759 / 21764
页数：6
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