DIFFRACTION STUDY ON THE THERMAL STABILITY OF Ti3SiC2/TiC/TiSi2 COMPOSITES IN VACUUM

被引：2
作者：
Pang, W. K. [1 ]
Low, I. M. [1 ]
O'Connor, B. H. [1 ]
Studer, A. J. [2 ]
Peterson, V. K. [2 ]
Palmquist, J. -P. [3 ]
机构：
[1] Curtin Univ Technol, Dept Imaging & Appl Phys, Ctr Mat Res, GPO Box U 1987, Perth, WA, Australia
[2] ANSTO, Bragg Inst, Menai, NSW 2234, Australia
[3] Kanthal AB, Heating Syst R&D, SE-73427 Hallstahammar, Sweden
来源：
NEUTRON AND X-RAY SCATTERING ADVANCING MATERIALS RESEARCH | 2009年 / 1202卷
基金：
澳大利亚研究理事会;
关键词：
Ti3SiC2; thermal stability; in-situ neutron diffraction; GRAIN-SIZE; TI3SIC2; TEMPERATURE; TOLERANT; PHASES; DAMAGE; AIR;
D O I：
10.1063/1.3295608
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Titanium silicon carbide (Ti3SiC2) possesses a unique combination of properties of both metals and ceramics, for it is thermally shock resistant, thermally and electrically conductive, damage tolerant, lightweight, highly oxidation resistant, elastically stiff, and mechanically machinable. In this paper, the effect of high vacuum annealing on the phase stability and phase transitions of Ti3SiC2/TiC/TiSi2 composites at up to 1550 degrees C was studied using in-situ neutron diffraction. The role of TiC and TiSi2 on the thermal stability of Ti3SiC2 during vacuum annealing is discussed. TiC reacts with TiSi2 between 1400-1450 degrees C to form Ti3SiC2. Above 1400 degrees C, decomposition of Ti3SiC2 into TiC commenced and the rate increased with increased temperature and dwell time. Furthermore, the activation energy for the formation and decomposition of Ti3SiC2 was determined.
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页码：44 / +
页数：2
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