The effect of intragranular microstress in Al<sub>2</sub>O<sub>3</sub>-SiC nanocomposites |
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| Authors: | Wang Zhi-Yuan ab Wu Yu-Gong ab Tong Shuai ab and Wu Si-Qi |
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| Institution: | School of Electronic and Information Engineering,Tianjin University;Key Laboratory of Advanced Ceramics and Machining Technology,Ministry of Education(Tianjin University) |
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| 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. |
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| Keywords: | nanocomposite grain boundary strengthening internal stress weakening |
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