High temperature corrosion of carbon/carbon composites in Zr–Ti melts during liquid metal infiltration
High temperature corrosion of carbon/carbon composites in Zr–Ti melts during liquid metal infiltration
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DOI：
10.1016/j.corsci.2015.05.014
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发表时间：
2015-09
影响因子：
8.3
通讯作者：
Yi-hui Zeng;X. Xiong;Dini Wang;Liang Wu;Z. Chen;Wei Sun;Yalei Wang;P. Xiao
中科院分区：
文献类型：
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作者：
Yi-hui Zeng;X. Xiong;Dini Wang;Liang Wu;Z. Chen;Wei Sun;Yalei Wang;P. Xiao
采用液态金属浸渗（LMI）工艺制备了Zr-Ti-C/C复合材料。研究了碳基体在锆钛合金熔体中的化学腐蚀和热应力损伤。提出了腐蚀机理和修复缺陷材料的方法。结果表明，Zr-Ti熔体及其蒸汽对复合材料内部碳基体没有腐蚀作用。然而，接触熔体的表面基质被严重消耗。此外，热应力的释放也是产生缺陷的原因。通过在缺陷处沉积新的热解碳，可以提高LMI后样品的弯曲强度。
The carbon/carbon composites with Zr–Ti–C were prepared by liquid metal infiltration (LMI) process. The chemical corrosion and thermal stress damage of carbon matrices in Zr–Ti melts were investigated. A corrosion mechanism and a method of rehabilitating defective materials were proposed. The results indicated that the internal carbon matrices of composites were not corroded by the Zr–Ti melts and their vapours. However, the superficial matrices contacting the melts were severely consumed. In addition, the release of thermal stress produced the defects. The flexural strength of the samples after LMI could be improved via a new deposition of pyrocarbon in the defects.