Constitutive Equations for the Creep of a Silicon Carbide Whisker‐Reinforced Polycrystalline Alumina Composite Material
作者:
Gladius Lewis,
Arnfinn Ostvoll,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 12
页码: 3481-3484
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb04455.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Theθ‐projection parametric method is used to analyze the creep strain‐versus‐time data, obtained in four‐point flexure, for a 25 wt% silicon whisker‐reinforced polycrystalline alumina composite material. The results, used in conjunction with a suggested value of the activation energy for the creep‐rate‐controlling process for this material of about 620 kJ/mol, led to a postulate that grain‐boundary sliding is the rate‐determining mechanism. In addition, the use of the results in obtaining the values of relevant design creep parameters (namely, life or stra
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