On physical and thermochemical properties of high-purity Ti3SiC2

被引：103
作者：
Gao, NF
Miyamoto, Y
Zhang, D
机构：
[1] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China
来源：
MATERIALS LETTERS | 2002年 / 55卷 / 1-2期
关键词：
Ti3SiC2; physical properties; mechanical properties; thermochernical properties; oxidation; HIP;
D O I：
10.1016/S0167-577X(01)00620-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dense polycrystalline Ti3SiC2 of high purity was successfully fabricated from Ti/Si/2TiC powders by reactive hot-isostatic pressing (HIPing) at 1688 K, 100 MPa for 7.2 ks. A flexural strength of 537 +/- 16 MPa and a Vickers hardness of 4.0 +/- 0.2 GPa. was obtained. The partial pressure of Si is important to maintain the stability of Ti3SiC2 at high temperatures. Ti3SiC2 tended to decompose in N-2, O-2 or C atmosphere at temperatures above 1623 K. The isothermal oxidation kinetics of Ti3SiC2 became parabolic in the temperature range of 1423-1523 K with an activation energy of 295 +/- 20 kJ/mol. At temperatures above 1573 K, the oxidation kinetics became linear. (C) 2002 Elsevier Science B.V, All rights reserved.
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页码：61 / 66
页数：6
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