Crack‐healing behaviour of ZrO2/SiC composite ceramics
Crack‐healing behaviour of ZrO2/SiC composite ceramics
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DOI：
10.1108/17579861011023810
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发表时间：
2010-03
影响因子：
2.7
通讯作者：
K. Houjou;K. Ando;Koji Takahashi
中科院分区：
文献类型：
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作者：
K. Houjou;K. Ando;Koji Takahashi
用途-氧化锆陶瓷具有高强度和断裂韧性。本文的目的是研究氧化锆陶瓷中裂纹愈合的可能性。设计/方法/途径-烧结ZrO 2/SiC复合陶瓷并进行三点弯曲。在每个试样上形成直径为100 μm的表面裂纹。裂纹愈合和试样进行测试bending.Findings -该文件发现，ZrO 2/SiC复合陶瓷材料具有较高的裂纹愈合能力，在相当低的温度。例如，直径为100 μm的裂纹即使在600°C下也能愈合。研究限制/影响-该论文提供了低温愈合和裂纹愈合的新机制。独创性/价值-该论文显示了愈合温度和愈合所需的最短时间在600 - 800°C的温度下在Arrhenius图上显示出良好的比例关系。裂纹愈合是由愈合过程中产生的SiO2方石英引起的。
Purpose – Zirconia ceramics exhibit high strength and fracture toughness. The purpose of this paper is to research a possibility of crack healing in zirconia ceramics.Design/methodology/approach – ZrO2/SiC composite ceramics are sintered and subjected to three‐point bending. A surface crack of 100 μm in diameter is formed on each specimen. The cracks are healed and the specimens are tested under bending.Findings – The paper finds that ZrO2/SiC composite ceramic material had a high crack‐healing ability at a considerably low temperature. For example, a crack of 100 μm in diameter is healed even at 600°C.Research limitations/implications – The paper provides a low temperature healing and a new mechanism of crack healing.Originality/value – The paper shows the healing temperature and the minimum time required to heal showed a good proportional relation on the Arrhenius plot at temperatures of 600‐800°C. Moreover, the crack healing is caused by SiO2 cristobalite produced during the healing.