窒化けい素セラミックスの静疲労き裂進展挙動に及ぼす微細構造の影響

DOI Web Site 被引用文献1件 参考文献11件

書誌事項

タイトル別名
  • Influence of Microstructure on the Static Fatigue Crack Growth of Silicon Nitride Ceramics.
  • チッカ ケイソ セラミックス ノ セイヒロウ キレツ シンテン キョドウ ニ

この論文をさがす

抄録

Static fatigue crack growth tests of several silicon nitride ceramics with various microstructures were carried out by a constant moment method. Correlations between the static fatigue crack growth behavior and microstructures, such as the size and distribution of grains and the fraction of rod-like grains, were investigated.<br>The experimental results showed the following tendency. The larger average grain size, the higher fatigue crack growth resistance. The more uniform distribution of grain size, the higher gradient of fatigue crack growth resistance curve for crack length ranging to about 5mm. And the fraction of rod-like grains was not so correlative to crack growth resistance.<br>Furthermore, a grain bridging model which may explain the influence of microstructure on fatigue crack growth behavior was proposed. In this model, the bridging force reducing effective stress intensity is described as a function of crack opening displacement and size and interval of bridging grains. The simulation showed that the more uniform distribution of grain size, the higher fatigue crack growth resistance. Also, the larger average grain size and the more fraction of rod-like grains, the higher fatigue crack growth resistance. These results were conformed qualitatively by the experimental results.

収録刊行物

  • 材料

    材料 46 (3), 282-287, 1997

    公益社団法人 日本材料学会

被引用文献 (1)*注記

もっと見る

参考文献 (11)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ