Zhuoke Zhang , Zhaofeng Chen , Le Lu , Wenjing Sun , Fei Wang , Shijie Chen , Qiankang Zheng , Guojian Liu , Lixia Yang , Yuming Xing
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Ceramic repair agents for damaged CMC: Assessing repair performance
In this paper, a low-temperature fast-curing repair agent with metal and ceramic powders composite modified with liquid sodium silicate was developed, which was optimized by composition to have high mechanical properties. After fabricating U-notches to remove cracks, the repair tolerance of Cf/SiC composites was investigated on the basis of relative residual flexural strength and notch depth, respectively. The fracture morphology of the repaired Cf/SiC parent material showed that the repair agent could fill the pores between the fiber bundles of the parent material better, and restored the flexural strength of the parent material from 91.07 MPa to 142.04 MPa, with a restoration rate as high as 55.96 %. This study is expected to be applied to the low-cost and rapid repair of ceramic matrix composites to increase the possibility of their application in aero engines.
期刊介绍：
The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.
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