{"title":"Effect of toughening with Y2O3 and YAG on the tribological properties of Al2O3 coatings","authors":"","doi":"10.1016/j.triboint.2024.110012","DOIUrl":null,"url":null,"abstract":"<div><p>Coatings of Al<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>-Y<sub>2</sub>O<sub>3</sub>, and Al<sub>2</sub>O<sub>3</sub>-YAG were developed using atmospheric plasma spraying techniques. Both composite coatings improved the toughness of the base Al<sub>2</sub>O<sub>3</sub> coating, with the Al<sub>2</sub>O<sub>3</sub>-YAG showing the most significant enhancement. During friction tests with steel balls, adhesive wear was predominant, and the Al<sub>2</sub>O<sub>3</sub>-YAG coating demonstrated the lowest wear rate. However, when tested against WC balls, abrasive wear was more prevalent. The composite coatings reduced the friction coefficient and mitigated crack initiation and propagation, yet they showed higher wear rates. During the friction process, a phase transformation from α-Al<sub>2</sub>O<sub>3</sub> to γ-Al<sub>2</sub>O<sub>3</sub> was noted in the Al<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub>-Y<sub>2</sub>O<sub>3</sub> coatings. In contrast, the Al<sub>2</sub>O<sub>3</sub>-YAG coating remained structurally stable without crystallization.</p></div>","PeriodicalId":23238,"journal":{"name":"Tribology International","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2024-07-19","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/S0301679X24007643","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}
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Abstract
Coatings of Al2O3, Al2O3-Y2O3, and Al2O3-YAG were developed using atmospheric plasma spraying techniques. Both composite coatings improved the toughness of the base Al2O3 coating, with the Al2O3-YAG showing the most significant enhancement. During friction tests with steel balls, adhesive wear was predominant, and the Al2O3-YAG coating demonstrated the lowest wear rate. However, when tested against WC balls, abrasive wear was more prevalent. The composite coatings reduced the friction coefficient and mitigated crack initiation and propagation, yet they showed higher wear rates. During the friction process, a phase transformation from α-Al2O3 to γ-Al2O3 was noted in the Al2O3 and Al2O3-Y2O3 coatings. In contrast, the Al2O3-YAG coating remained structurally stable without crystallization.
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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