Development and oxidation resistance of air plasma sprayed Mo–Si–Al coating on an Nbss/Nb5Si3 in situ composite
Development and oxidation resistance of air plasma sprayed Mo–Si–Al coating on an Nbss/Nb5Si3 in situ composite
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DOI：
10.1016/j.corsci.2010.04.008
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发表时间：
2010-08
影响因子：
8.3
通讯作者：
Dengzun Yao;W. Gong;Chungen Zhou
中科院分区：
文献类型：
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作者：
Dengzun Yao;W. Gong;Chungen Zhou
为保护Nbss/Nb5Si3原位复合材料，研制了一种以Mo(Si，Al)2和Mo5(Si，Al)3为主要成分的Mo-Si-Al涂层。在1250℃氧化后，氧化曲线符合抛物线规律，即使氧化100h，Mo-Si-Al涂层的增重率仍为8.24 mg/cm2。随着氧化时间的延长，二氧化硅玻璃的形成使氧化后的样品表面变得更加平整、光滑。此外，氧化后Mo-Si-Al涂层的组织发生了变化，在基材-涂层界面形成了层状互扩散带。
A Mo–Si–Al coating, which is mainly composed of Mo(Si,Al)2and Mo5(Si,Al)3, was developed to protect a Nbss/Nb5Si3in situ composite by air plasma spraying. After oxidation at 1250°C, the oxidation curve followed parabolic law and even after oxidation for 100h, the weight gain of Mo–Si–Al coating was 8.24mg/cm2. The surface of the oxidized samples became flatter and smoother as time increased due to the formation of SiO2glass. Moreover, the microstructure of Mo–Si–Al coating changed and a layer structured interdiffusion zone was formed at the substrate-coating interface after oxidation.