The effect of intragranular microstress in Al2O3–SiC nanocomposites

doi:10.1088/1674-1056/21/6/066501

Abstract A theoretical model is established to investigate the intragranular particle residual stress in Al₂O₃-SiC nanocomposites. Using this model, we calculate the average compressive stress on the Al₂O₃ grain boundary (GB) and the average tensile stress within Al₂O₃ grains caused by SiC nanoparticles. The normal compressive stress strengthens the GB, and the average tensile stress weakens the grains. The model gives a reasonable interpretation of the strength changes of Al₂O₃-SiC nanocomposites with the number of SiC particles.

Keywords: nanocomposite grain boundary strengthening internal stress weakening

Received: 08 October 2011
Revised: 08 December 2011
Accepted manuscript online:

PACS:	65.80.-g	(Thermal properties of small particles, nanocrystals, nanotubes, and other related systems)
	78.67.Sc	(Nanoaggregates; nanocomposites)
	83.60.Hc	(Normal stress differences and their effects (e.g. rod climbing))
	61.16.-w

Fund: Project supported by the Tianjin Natural Science Foundation, China (Grant No. 09JCZDJC22500).

Corresponding Authors: Wu Yu-Gong
E-mail: wuyugong@tju.edu.cn

Cite this article:

Wang Zhi-Yuan(王志远), Wu Yu-Gong(吴裕功), Tong Shuai(佟帅), and Wu Si-Qi(吴斯骐) The effect of intragranular microstress in Al₂O₃–SiC nanocomposites 2012 Chin. Phys. B 21 066501

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The effect of intragranular microstress in Al2O3–SiC nanocomposites

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The effect of intragranular microstress in Al₂O₃–SiC nanocomposites