High-Performance HVOF-Sprayed Fe-Based Amorphous Coating on LA141 Magnesium Alloy via Optimizing Oxygen Flow and Kerosene Flow

被引：15

作者：

Sun, Yijiao ^{[1
]}

Wang, Weichao ^{[1
]}

Li, Hongxiang ^{[1
]}

Xie, Lu ^{[2
]}

Li, Yongbing ^{[3
]}

Wang, Shanlin ^{[4
]}

Wang, Wenrui ^{[2
]}

Zhang, Jiaming ^{[2
]}

Zhang, Jishan ^{[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 330063, Jiangxi, Peoples R China

来源：

MATERIALS | 2021年 / 14卷 / 17期

基金：

中国国家自然科学基金;

关键词：

LA141 magnesium alloy; Fe-based amorphous coatings; high-velocity oxygen-fuel (HVOF) spraying; corrosion and wear resistance; bonding strength; CORROSION-RESISTANCE; BEHAVIOR; POROSITY; CRYSTALLIZATION; EVOLUTION; DEFECTS; MILD;

D O I：

10.3390/ma14174786

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To solve the problem of poor corrosion and wear resistance of Mg-Li alloys, Fe-based amorphous coatings were prepared by high velocity oxygen-fuel spraying technology (HVOF) on the LA141 magnesium alloy substrate with a Ni60 intermediate layer. The microstructure and performance of Fe-based amorphous coatings with different oxygen flow and kerosene flow were characterized and analyzed. The results demonstrate that there is an optimal oxygen/kerosene ratio where the porosity of Fe-based amorphous coating is the lowest. Moreover, the amorphous content increases with the decrease in the oxygen/kerosene ratio. In particular, when the oxygen flow is 53.8 m(3)/h and the kerosene flow is 26.5 L/h, the Fe-based amorphous coating possesses the lowest porosity (0.87%), the highest hardness (801 HV0.(1)), the highest bonding strength (56.9 MPa), and an excellent corrosion and wear resistance. Additionally, it can be seen that the Fe-based amorphous coating is composed of amorphous splats and amorphous oxides, but the Ni60 intermediate layer exhibits an amorphous and crystalline multi-phase structure. The high bonding strength of the coating is attributed to the low porosity of Fe-based amorphous coating and the localized metallurgical bonding between different layers. Finally, the mechanisms on corrosion and wear of Fe-based amorphous coatings are also discussed.

引用

页数：17

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