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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Strengthening of alumina by a low thermal expansion glass at surface
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Strengthening of alumina by a low thermal expansion glass at surface

机译：通过低热膨胀玻璃在表面增强氧化铝

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摘要

A low thermal expansion glass was melted on the sintered alumina. The molten glass penetrated into the surface region of the alumina along the grain boundaries. Thermal and elastic properties mismatch between the glass-penetrated surface region and the interior of alumina produced residual compression in the surface region during cooling. The glass penetration improved the strength by about 53% and also there was a significantly improvement in the thermal shock resistance of the alumina. The observed enhancement in the strength was found to be almost equal to the residual stress generated as a result of thermal and elastic properties mismatch.
机译：将低热膨胀玻璃熔化在烧结的氧化铝上。熔融玻璃沿晶界渗入氧化铝的表面区域。在玻璃渗透的表面区域和氧化铝内部之间的热和弹性性质不匹配，从而在冷却期间在表面区域中产生残余压缩。玻璃渗透性使强度提高了约53％，并且氧化铝的耐热冲击性也有了显着提高。发现观察到的强度增强几乎等于由于热和弹性特性不匹配而产生的残余应力。

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