Grain size effect on creep deformation of alumina-silicon carbide composites

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作者：
Oak Ridge Natl Lab, Oak Ridge, United States [1 ]
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来源：
J Am Ceram Soc | / 6卷 / 1530-1536期
关键词：
Alumina - Amorphous materials - Creep - Crystal whiskers - Effects - Grain boundaries - Grain size and shape - Hot pressing - Interfaces (materials) - Nucleation - Rheology - Silicon carbide;
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摘要：
A study of the flexural creep response of aluminas reinforced with 10 vol% SiC whiskers was conducted at 1200° and 1300°C at stresses from 50 to 230 MPa in air to evaluate the effect of matrix grain size. The average matrix grain size was varied from 1.2 to 8.0 μm by controlling the hot-pressing conditions. The results provide an understanding of the relationship between grain size and creep rate for an alumina-SiC composite with constant whisker content.
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