Microstructure and oxidation resistance of a multiphase Mo-Si-B ceramic coating on Mo substrates deposited by a plasma transferred arc process
Microstructure and oxidation resistance of a multiphase Mo-Si-B ceramic coating on Mo substrates deposited by a plasma transferred arc process
复制标题
等离子转移弧工艺沉积 Mo 基体上多相 Mo-Si-B 陶瓷涂层的微观结构和抗氧化性能
DOI：
10.1016/j.ceramint.2018.09.182
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发表时间：
2019-01
影响因子：
5.2
通讯作者：
Cao Qian
中科院分区：
文献类型：
--
作者：
Deng Xinke;Zhang Guojun;Wang Tao;Ren Shuai;Shi Yao;Bai Zhonglian;Cao Qian
为了提高钼基体的抗氧化性能，采用等离子弧（PTA）工艺制备了Mo-Si-B复相陶瓷涂层。研究了涂层的相组成、显微组织和抗氧化性能。结果表明，Mo-Si-B涂层的组织为棒状Mo 5SiB 2枝晶、Mo 3Si/Mo 5SiB 2二元共晶的片层结构和胞状Mo 5Si 3枝晶。与Mo基体相比，Mo-Si-B涂层在1300 °C空气气氛下的抗氧化性能有显著提高。这主要是由于在Mo-Si-B涂层的表面上形成的致密且连续的硼硅酸盐层，其充当氧扩散阻挡层。此外，据观察，Mo 5SiB 2枝晶表现出更高的抗氧化性相比，Mo 3Si/Mo 5SiB 2共晶在高温氧化暴露。根据氧化动力学和氧化后Mo-Si-B试样的截面显微组织分析，讨论了Mo-Si-B的氧化行为。
To improve the oxidation resistance of a Mo substrate, a multiphase Mo-Si-B ceramic coating was deposited using a plasma transferred arc (PTA) process. The phase constituents, microstructure, and oxidation resistance of the coating were investigated. The results show that the microstructure of the Mo-Si-B coating is characterised by rod-like Mo5SiB2dendrites, a lamellar structure of Mo3Si/Mo5SiB2binary eutectics, and cellular Mo5Si3dendrites. Compared with the Mo substrate, the Mo-Si-B coating exhibits a significant improvement in the oxidation resistance at 1300 °C in an air atmosphere. This is mainly owing to a dense and continuous borosilicate layer formed on the surface of the Mo-Si-B coating, which acts as an oxygen diffusion barrier. Moreover, it is observed that the Mo5SiB2dendrites exhibit a higher oxidation resistance compared to Mo3Si/Mo5SiB2eutectics during high-temperature oxidation exposure. The oxidation behaviour is discussed based on the oxidation kinetics and a cross-sectional microstructure analysis of the oxidised Mo-Si-B specimen.
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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
影响因子：
8.3
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
I. P. Downs;J. Perepezko;R. Sakidja;S. R. Choi
影响因子：
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作者：
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影响因子：
2.6
作者：
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通讯作者：
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