Interfacial bonding mechanism and properties of HVOF-sprayed Fe-based amorphous coatings on LA141 magnesium alloy substrate

被引：45
作者：
Sun, Y. J. [1 ]
Yang, R. [1 ]
Xie, L. [2 ]
Wang, W. R. [2 ]
Li, Y. B. [3 ]
Wang, S. L. [4 ]
Li, H. X. [1 ]
Zhang, J. M. [2 ]
Zhang, J. S. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
[3] Beijing Natl Innovat Inst Lightweight Ltd, State Key Lab Adv Forming Technol & Equipment, Beijing 100083, Peoples R China
[4] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, Nanchang 330000, Jiangxi, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2021年 / 426卷 / 426期
基金：
中国国家自然科学基金;
关键词：
LA141 magnesium alloy substrate; Fe-based amorphous coatings; High velocity oxygen-fuel (HVOF) spraying; Bonding strength; Corrosion and wear resistance; PLASMA ELECTROLYTIC OXIDATION; MG-LI ALLOY; CORROSION-RESISTANCE; COLD SPRAY; COMPOSITE COATINGS; CERAMIC COATINGS; HEAT-TREATMENT; WEAR BEHAVIOR; PROTECTION; MICROSTRUCTURE;
D O I：
10.1016/j.surfcoat.2021.127801
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Due to poor corrosion and wear resistance, Mg-Li alloys often experience the premature failure during their service. In order to improve the corrosion and wear resistance of Mg-Li alloys, Fe-based amorphous coatings were firstly prepared on the LA141 magnesium alloy substrate by high velocity oxygen-fuel spraying technology (HVOF) in this study. It is noticed that by introducing the Ni60 interlayer with the thickness of 150 mu m, the bonding strength of the Fe-based amorphous coating on LA141 alloy substrate can reach 56.9 MPa, which is currently the highest value of Fe-based amorphous coatings on magnesium alloys reported so far. It is found that the improvement of bonding strength is attributed to the localized metallurgical bonding at the interfaces of Fe-based amorphous coating/Ni60 and Ni60/LA141 and the compactness of Fe-based amorphous coatings. Moreover, the corrosion and wear resistance of the LA141 magnesium alloy with the Fe-based amorphous coatings are 34 times and 170 times higher than those of the bare LA141 magnesium alloy substrate, respectively. Finally, the failure mechanisms of the Fe-based amorphous coatings during tension and wear are discussed. This study can provide an alternative method for the surface protection of Mg-Li alloys.
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页数：13
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