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

Synthesis and microstructure of Ti3AlC2 by mechanically activated sintering of elemental powders
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单质粉末机械活化烧结Ti3AlC2的合成及微观结构

DOI:
10.1016/j.ceramint.2005.07.024
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发表时间:
2007-03
影响因子:
5.2
通讯作者:
Zhai, Hong-Xiang
Zhai, Hong-Xiang
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhang, Zhi-Li;Zhou, Yang;Li, Shi-Bo;Bei, Guo-Ping;Zhai, Hong-Xiang

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采用机械活化烧结(MAS)工艺,以Ti、Al和石墨元素粉末为原料,合成了Ti 3AlC 2陶瓷。这些进行机械合金化与充电比(CR)分别为20:1和50:1。当配比为20:1时,球磨4 h可得到TiC、Ti_3AlC_2和Al_3Ti的细粉;当配比为50:1时,球磨1.5h可得到TiC、Ti_3AlC_2和Al_3Ti的细粉。机械合金化(MAed)粉末在不同温度下无压烧结。Ti_3AlC_2在1250°C开始形成,在1350°C含量增加。然而,它在1450°C分解为TiC。烧结试样的显微组织显示,大量Ti 3AlC 2晶粒发生分层和破碎。还发现了严重分层的Ti_3AlC_2晶粒,晶粒内部出现了弯折带。
The mechanically activated sintering (MAS) process has been adopted to synthesize Ti3AlC2by 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, Ti3AlC2and Al3Ti were obtained after milling for 4h with a CR of 20:1, and for 1.5h with a CR of 50:1. The mechanical alloyed (MAed) powders were pressureless sintered at different temperatures. Ti3AlC2started to form at 1250°C and its content increased at 1350°C. However, it decomposed to TiC at 1450°C. The microstructure of sintered samples showed that many Ti3AlC2grains were delaminated and broken. Some severely delaminated Ti3AlC2grains in which kink bands developed were also found.
DOI: 10.1007/bf02647559
发表时间: 1994-08
期刊: Journal of Phase Equilibria
影响因子: --
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