High-temperature tribological performance of (NiCr-20Cr3C2)-2Al-XAg coatings in chloride molten salts

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-01-16 DOI:10.1016/j.triboint.2025.110542

Min Zheng , Zhiao Bian , Qichun Sun , Zongxiao Zhu , Jun Cheng , Hui Tan , Jun Yang

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引用次数: 0

Abstract

In this work, the friction-reduction and anti-wear (NiCr-20Cr₃C₂)-2Al-XAg coatings were prepared by laser cladding. The correlations among composition, microstructure, hardness and tribological performance in chloride molten salts at high temperature were investigated. The coatings exhibit a dense microstructure, with Ag notably enriching at the overlap regions. As the Ag content increases, both the friction coefficient and wear rate initially decrease and then rise. The synergistic effects of the ceramic phase, lubricating Ag, and corrosion-resistant phases of Al₂O₃ and Cr₂O₃ significantly enhance the tribological performance of the coatings in chloride molten salts. Among these, the (NiCr-20Cr₃C₂)-2Al-5Ag coating demonstrates outstanding friction-reducing and anti-wear properties, exhibiting an average friction coefficient of 0.11 and a wear rate of 9.8 × 10⁻⁶ mm³/N·m.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.