Effect of Reinforcement Particle Size on the Thermal Conductivity of a Particulate‐Silicon Carbide‐Reinforced Aluminum Matrix Composite
作者:
D. P. H. Hasselman,
Kimberly Y. Donaldson,
Alan L. Geiger,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 11
页码: 3137-3140
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb04400.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
The thermal conductivity of a 40 vol% silicon carbide‐particulate‐reinforced aluminum matrix composite was determined as a function of silicon carbide mean particle size ranging from 0.7 to 28 μm. A size dependence was found consisting of a decrease in thermal conductivity with decreasing SiC particle size. This effect is in accordance with theoretical expectations for composites with an interfacial thermal barrier at the dispersion–matrix interface. At the finest particle size of the silicon carbide, the composite thermal conductivity approached the value for the matrix with pores, as expected from theory. Only at the largest SiC particle size did the composite thermal conductivity exceed the value for the matrix. These results suggest that in maximizing the thermal conductivity of composites with an interfacial thermal barrier, the reinforcement particle size should be as large as practically po
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