{"title":"High-temperature tribological properties of NiCr-Cr3C2 cermet coatings in fluoride molten salts","authors":"","doi":"10.1016/j.triboint.2024.110150","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, the NiCr-Cr<sub>3</sub>C<sub>2</sub> coatings with different Cr<sub>3</sub>C<sub>2</sub> contents were prepared via high-speed laser cladding. The relationships between the composition, microstructure, and high-temperature tribological properties in fluoride molten salts were systematically studied. The results suggest that with the increase of Cr<sub>3</sub>C<sub>2</sub> content, the friction coefficient tends to decrease and stabilize, while the wear rate initially decreases and then increases. Especially for the coating with 60 wt% Cr<sub>3</sub>C<sub>2</sub>, it exhibits a favorable tribological performance mainly due to the enhanced hardness imparted by Cr<sub>3</sub>C<sub>2</sub>, with an average friction coefficient of 0.12 and a wear rate of 2.78 × 10<sup>−6</sup> mm<sup>3</sup>/Nm. However, the coating experiences delamination damage at 70 wt% Cr<sub>3</sub>C<sub>2</sub> content, leading to an increase in wear rate.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tribology International","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301679X24009022","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, the NiCr-Cr3C2 coatings with different Cr3C2 contents were prepared via high-speed laser cladding. The relationships between the composition, microstructure, and high-temperature tribological properties in fluoride molten salts were systematically studied. The results suggest that with the increase of Cr3C2 content, the friction coefficient tends to decrease and stabilize, while the wear rate initially decreases and then increases. Especially for the coating with 60 wt% Cr3C2, it exhibits a favorable tribological performance mainly due to the enhanced hardness imparted by Cr3C2, with an average friction coefficient of 0.12 and a wear rate of 2.78 × 10−6 mm3/Nm. However, the coating experiences delamination damage at 70 wt% Cr3C2 content, leading to an increase in wear rate.
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.
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