Synthesis and microstructure of Ti3AlC2 by mechanically activated sintering of elemental powders

被引：56

作者：

Li, Shi-Bo ^{[1
]}

Zhai, Hong-Xiang ^{[1
]}

Bei, Guo-Ping ^{[1
]}

Zhou, Yang ^{[1
]}

Zhang, Zhi-Li ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Mech & Elect Control Engn, Beijing 100044, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2007年 / 33卷 / 02期

关键词：

milling; sintering; microstructure; Ti3AlC2;

D O I：

10.1016/j.ceramint.2005.07.024

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：

The mechanically activated sintering (MAS) process has been adopted to synthesize Ti3AlC2 by using Ti, Al and graphite elemental powders. These were subjected to mechanical alloying with charge ratios (CR) of 20:1 and 50:1, respectively. Fine powders containing TiC, Ti3AlC2 and Al3Ti were obtained after milling for 4 h with a CR of 20:1, and for 1.5 h with a CR of 50:1. The mechanical alloyed (MAed) powders were pressureless sintered at different temperatures. Ti3AlC2 started to form at 1250 degrees C and its content increased at 1350 degrees C. However, it decomposed to TiC at 1450 degrees C. The microstructure of sintered samples showed that many Ti3AlC2 grains were delaminated and broken. Some severely delaminated Ti3AlC2 grains in which kink bands developed were also found. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：169 / 173

页数：5

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