Grain size dependence of fracture toughness for fine grained alumina

Wenlong Yao; Jing Liu; Troy B. Holland

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Grain size dependence of fracture toughness for fine grained alumina

机译：细颗粒氧化铝的断裂韧性与晶粒尺寸的关系

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The fracture toughness of a series of fully dense polycrystalline alumina samples prepared by electrical field assisted sintering with grain sizes varying from ～290 nm to ～3.3 urn was measured using the surface crack in flexure method. Fracture toughness values for different grain sizes were statistically analyzed based on the Weibull distribution. It was found that the fracture toughness in fine grained alumina is independent of grain size. The characteristic fracture toughness calculated from the Weibull distribution is 3.37 MPa m~(1/2).

机译：使用屈曲法的表面裂纹测量了一系列电场致密的全致密多晶氧化铝样品的断裂韧性，这些样品的晶粒尺寸从290nm到〜3.3um不等。根据威布尔分布统计分析不同晶粒尺寸的断裂韧性值。发现细粒氧化铝的断裂韧性与晶粒尺寸无关。根据威布尔分布计算的特征断裂韧性为3.37 MPa m〜（1/2）。

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《Scripta materialia》 |2011年第2期|共4页
作者
Wenlong Yao; Jing Liu; Troy B. Holland;
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正文语种 eng
中图分类冶金工业;
关键词
Ultrafine grained microstructure; Ceramics; Toughness; Weibull distribution;

机译：超细晶粒组织;陶瓷;韧性;Weibull分布;

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Grain size dependence of fracture toughness for fine grained alumina

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