Effect of magnetron sputtered Al coating and anodization on the hot corrosion performance of Ti48Al2Nb2Cr alloy

被引：5
作者：
Li, Zhe-Xuan [1 ]
Liu, Yan-Hua [2 ]
Liu, Hui-Jun [3 ]
Wu, Lian-Kui [1 ]
Cao, Fa-He [1 ]
机构：
[1] Sun Yat sen Univ, Sch Mat, Shenzhen 518107, Peoples R China
[2] Zhejiang Univ, Ctr Micronano Fabricat, Hangzhou 310027, Peoples R China
[3] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2023年 / 36卷
基金：
中国国家自然科学基金;
关键词：
TiAl alloy; Hot corrosion; Magnetron sputtering; Anodization; Fluorine effect; GAMMA-TITANIUM ALUMINIDES; TI-46AL-8TA AT.PERCENT; OXIDATION RESISTANCE; TIAL ALLOY; BEHAVIOR; MICROSTRUCTURE; PROTECTION; SULFATE; NA2SO4; SALT;
D O I：
10.1016/j.mtcomm.2023.106524
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To enhance the hot corrosion resistance for Ti48Al2Nb2Cr alloy, an Al coating was magnetron sputtered first and then anodized in fluorine-containing ethylene glycol. Before being deposited with salt, the specimen was preoxidized in air to generate an Al2O3-based protective layer. The hot corrosion performance of the specimen contaminated with 75 wt% Na2SO4 and 25 wt% NaCl was evaluated at 700 degrees C. It is shown that anodization facilitates the formation of a compact Al2O3 layer, and the magnetron sputtered Al coating can provide Al element for the continuous generation of protective Al2O3, therefore acting as a diffusion barrier to the inward diffused oxygen and salt ions as well as the outward diffused matrix elements.
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页数：12
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