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不同介質(zhì)中Si3N4陶瓷的靜疲勞與循環(huán)疲勞
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TQ174.4

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Static Fatigue and Cyclic Fatigue Behaviour of Si3N4 Ceramics in Different Environment Medias
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    摘要:

    系統(tǒng)研究了Si3N4陶瓷在空氣、水、煤油3種介質(zhì)中的靜疲勞及循環(huán)疲勞特性。結(jié)果發(fā)現(xiàn),在不同介質(zhì)條件下,循環(huán)疲勞的應(yīng)力腐蝕指數(shù)(n)相差不大,且遠(yuǎn)遠(yuǎn)低于相同介質(zhì)條件下靜疲勞的應(yīng)力腐蝕指數(shù)。經(jīng)分析發(fā)現(xiàn),循環(huán)載荷部分或全部消除了顯微組織屏蔽作用,對材料造成附加損傷,導(dǎo)致其疲勞壽命遠(yuǎn)遠(yuǎn)低于靜疲勞壽命。

    Abstract:

    The static fatigue and cyclic fatigue behaviour of Si3N4 ceramics in different environments (air, H2O and kerosene) were studied systematically. The results show that the stress corrosion index(n) under cyclic loading is almost the same in the various medias, and much higher than that in the same media under static loading. Mechanical cycling was deduced to introduce an additional failure mechanism that caused the cyclic fatigue life to be much shorter than static fatigue life.

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王紅潔 王永蘭 金志浩.不同介質(zhì)中Si3N4陶瓷的靜疲勞與循環(huán)疲勞[J].稀有金屬材料與工程,2003,(8):639~642.[Wang Hongjie, Wang Yonglan, Jin Zhihao. Static Fatigue and Cyclic Fatigue Behaviour of Si3N4 Ceramics in Different Environment Medias[J]. Rare Metal Materials and Engineering,2003,(8):639~642.]
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  • 最后修改日期:2000-12-05
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