期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 23, 期 7, 页码 1115-1122出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(02)00271-6
关键词
interfacial thermal barrier; SiC; sintering; thermal conductivity; thermal diffusivity; YAG
This study investigates the thermal diffusivity and conductivity of YAG/AIN-alloyed LPS-SiC as a function of composition and temperature using the laser-flash technique. Maxwell's model for the thermal conductivity of composites with spherical inclusions is adapted to typical features of the LPS-microstructure and its predictions are compared with experimental data. The results indicate that the thermal conductivity of LPS-SiC is controlled by (i) concentration of impurity atoms in the SiC-phase, (ii) fraction of bulk oxide phase and (iii) amorphous interphases which act as thermal resistance barriers. (C) 2002 Elsevier Science Ltd. All rights reserved.
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