Synthesis of single-phase Ti3SiC2 with the assistance of liquid phase formation
Synthesis of single-phase Ti3SiC2 with the assistance of liquid phase formation
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DOI：
10.1016/j.jallcom.2006.08.342
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发表时间：
2007-08
影响因子：
6.2
通讯作者：
Yong Zou;Zhengming Sun;Shuji Tada;H. Hashimoto
中科院分区：
文献类型：
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作者：
Yong Zou;Zhengming Sun;Shuji Tada;H. Hashimoto
采用脉冲放电烧结（PDS）技术，在1350-1400°C下烧结Ti/Si/TiC混合粉末（-0.15mm），短时间（20 min），成功地合成了单相、近全致密的三元化合物Ti 3SiC 2。发现Ti 3SiC 2是通过Ti 5Si 3、TiSi 2中间相与原料粉末反应生成的。通过对收缩位移曲线的研究，揭示了在Ti-Ti 5Si 3共晶温度以上存在Ti-Si液相反应的证据，认为该液相反应对三元相合成反应和致密化有很大的促进作用。
Single-phase, nearly fully dense ternary compound Ti3SiC2was successfully synthesized by pulse discharge sintering (PDS) Ti/Si/TiC powder mixture, where coarse Ti powder (−0.15mm) was used, at 1350–1400°C for a short time of 20min. Ti3SiC2was found to form through reaction among intermediate phases of Ti5Si3, TiSi2and the starting powders. Evidence of Ti–Si liquid reaction above Ti–Ti5Si3eutectic temperature was revealed by studying the shrinkage displacement curve, and this liquid reaction is believed to have greatly assisted the ternary phase synthesis reaction as well as densification.