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How do you fix a crack in a ceramic vase? 

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It is found that crack-healing can eliminate the pre-crack under stress below 64% fracture stress of the cracked specimen, if the ceramic components have an adequate crack-healing ability.
Nevertheless, the results show that these two conditions together with the isotropic damage assumption can always shield the main-crack tip, and therefore increase the ceramic toughness.
The main conclusions were obtained as follows: (a) Mullite/SiC composite ceramic has ability to heal crack.
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.
These observations may be applied to the problem of ‘crack-stopping’ in certain ceramic materials.
We show finally, that the method permits the detection of a crack located in an ovoid vase of the same French National museum of the Ceramics of Sevres.
Knowledge about the crack propagation parameters n and A are of great importance when preclinically predicting the clinical suitability of dental ceramic materials.
This paper quantitatively studies the thermal-shock crack growth of ceramic in real time and expands the scientific understanding of thermal shock cracking phenomenon of ceramic.
The present study leads to an improved understanding of the formation and evolution of thermal shock crack patterns in ceramics and can help engineers to assess the thermal shock failure of practical ceramic components.
These crack patterns are very useful to understand the failure mechanisms of ceramic materials in thermal shock.