Oxidation Dominated High-Temperature Friction and Wear Behavior of Composite Coating NiCr-Cr3C2-BaF2/CaF2

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2025-04-01 DOI:10.1007/s11666-025-01984-8

Kaili Feng, Tianmin Shao

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引用次数: 0

Abstract

NiCr-Cr₃C₂-BaF₂/CaF₂ is a commonly used self-lubricating composite coating prepared on the surface of the moving components operating at high temperatures. The role of oxidation in high-temperature friction and wear behavior was studied in NiCr-Cr₃C₂-BaF₂/CaF₂ composite coatings. The coefficient of friction and wear rate of as-sprayed composite coatings decreased with increasing temperature from 600 to 800 °C due to the formation of tribo-layer mainly containing BaCrO₄ and CaCrO₄. However, the wear resistance of coatings decreased significantly as the oxidation time increased at 800 °C. The supporting effect of the near surface on the upper tribo-layer was weakened due to the generation of voids near the surface of composite coating after prolonged oxidation. The present study helps further understand the failure mechanism of NiCr-Cr₃C₂-BaF₂/CaF₂ coating in long service and provides an insight into the interactions between oxidation and wear in the sliding interface for multi-phase composite coatings.

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NiCr-Cr3C2-BaF2/CaF2复合涂层的高温摩擦磨损性能

NiCr-Cr3C2-BaF2/CaF2是制备在高温运动部件表面的一种常用的自润滑复合涂层。研究了氧化对NiCr-Cr3C2-BaF2/CaF2复合涂层高温摩擦磨损性能的影响。在600 ~ 800℃范围内，随着温度的升高，喷涂复合涂层的摩擦系数和磨损率下降，主要是由于形成了以BaCrO4和CaCrO4为主的摩擦层。在800℃时，随着氧化时间的延长，涂层的耐磨性明显下降。由于复合涂层在长时间氧化后在表面附近产生孔洞，近表面对上摩擦层的支撑作用减弱。本研究有助于进一步了解NiCr-Cr3C2-BaF2/CaF2涂层在长期使用中的失效机理，并为多相复合涂层滑动界面中氧化与磨损的相互作用提供了新的思路。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.