Temperature Profile Analysis in Combustion Synthesis: II, Experimental Observations
作者:
Stephen D. Dunmead,
Zuhair A. Munir,
J. Birch Holt,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 1
页码: 180-188
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb05462.x
出版商: Blackwell Publishing Ltd
关键词: combustion synthesis;temperature;kinetics;ziroconium;boron
数据来源: WILEY
摘要:
The temperature profiles associated with the passing of a self‐propagating wave in the combustion synthesis of zirconium boride were investigated. The use of these profiles in the determination of the kinetics of the associated synthesis reaction was investigated. From profile analysis an activation energy of 144.5 ± 15 kJ · mol−1was calculated and was found to agree very well with the corresponding value obtained from wave velocity measurements, 148.6 ± 12 kJ · mol−1. From these analyses, the thermal diffusivity of the reactants was also calculated. The thermal diffusivity decreased slightly with increasing combustion temperature, with the values ranging from 2.10 × 10−3to 1.79 × 10−3over the range of 2609 to 2909
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