Synthesis of TiB2-TiC-Ti3SiC2 Composites by Reactive Hot Pressing of B4C-SiC-Ti Powder Mixtures

被引：5
|
作者：
Taimatsu, Hitoshi [1 ]
Sugiyama, Shigeaki [2 ]
Koseki, Shuhou [1 ]
机构：
[1] Akita Univ, Fac Engn & Resource Sci, Dept Mat Sci & Engn, Akita 0108502, Japan
[2] Akita Prefectural Res & Dev Ctr, Akita 0101623, Japan
来源：
MATERIALS TRANSACTIONS | 2008年 / 49卷 / 10期
关键词：
titanium boride; titanium carbide; titanium silicon carbide; reaction sintering; solid state reactions;
D O I：
10.2320/matertrans.MRA2008174
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
TiB2-TiC-Ti3SiC2 composites were reaction-sintered from B4C-xSiC-(3 + 2x)Ti (x = 0 to 1) powder mixtures using reactive hot pressing. and the phase relation of reaction products and sintering behavior were investigated. The reaction B4C + xSiC + (3 + 2x)Ti -> 2TiB(2) + (1 - x)TiC + xTi(3)SiC(2) proceeded fundamentally during hot pressing. Although the reaction demands no production of TiC phase at x = 1, TiC phase was formed due to the nonstoichiometry of TiC and Ti3SiC2 phases produced. The hot-pressed composites containing the layered compound Ti3SiC2 had no preferential texture. Both TiB, and TiC were first produced near 960 degrees C during heating, and then Ti3SiC2 near 1200 degrees C. The product Ti3SiC2 contributed effectively to the densification of the composites above 1450 degrees C. [doi: 10.2320/matertrans.MRA2008174]
引用
收藏
页码：2335 / 2340
页数：6
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