Microstructure and oxidation resistance of Mo–Si–B coating on Nb based in situ composites

Microstructure and oxidation resistance of Mo–Si–B coating on Nb based in situ composites
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铌基原位复合材料Mo-Si-B涂层的显微组织和抗氧化性能

DOI:
10.1016/j.corsci.2014.07.006
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发表时间:
2014-10
期刊:
影响因子:
8.3
通讯作者:
Chungen Zhou
Chungen Zhou
中科院分区:
材料科学1区
文献类型:
--
作者:
Jingyan Wu;Wan Wang;Chungen Zhou

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以Mo-Si-B系两步法涂层为例,对Nb-Si基合金高温抗氧化涂层的发展进行了评价。结果表明,涂层由外层含MoSi2的硼化物弥散体和内层未反应的Mo组成。在1250℃干燥空气中氧化100h后,基体和Mo-Si-B涂层的质量增重率分别为190.08和1.28mgcm−2。涂层良好的抗氧化性归功于形成了连续的硼硅酸盐玻璃覆盖层。
The development of robust high temperature oxidation resistant coatings for Nb–Si based alloy was evaluated for a Mo–Si–B coating system that was applied by a two step process. It is observed that the coating is composed of an outer layer of MoSi2containing boride dispersoids and an inner layer of unreacted Mo. The mass gain of substrate and Mo–Si–B coating is 190.08 and 1.28 mg cm−2after oxidation at 1250 °C in dry air for 100 h, respectively. The good oxidation resistance of the coating is attributed to the formation of a continuous borosilicate glass coverage.
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