Viscous glass crack bridging forces in a sintered glassy alumina at elevated temperatures

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作者：
机构：
[1] Jakus, Karl
[2] Ritter, John E.
[3] Schwillinski, Roland H.
来源：
Jakus, Karl | 1600年 / 76期
关键词：
Crack propagation - Toughening - Vitrification;
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摘要：
Time-dependent crack bridging forces were measured at temperatures from 1150° to 1275°C in a vitreous bonded alumina using the rear-notched, short double cantilever beam technique. Glassy ligaments were observed to bridge the crack even after the crack entered the rear notch. The crack bridging force exhibited both a temperature and displacement placement rate dependency. A model was developed that describes this temperature and time dependence of the bridging forces that result from the viscous glass bridges.
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