{"title":"Excellent CMAS Corrosion Resistance of a Novel Multicomponent High-Entropy Rare Earth (Yb0.25Sc0.25Er0.25Tm0.25)2Si2O7 Disilicate","authors":"Sehreish Abrar, Faisal Nazeer, Abdul Malik","doi":"10.1007/s11085-025-10330-w","DOIUrl":null,"url":null,"abstract":"<div><p>A novel high-entropy rare earth (Yb<sub>0.25</sub>Sc<sub>0.25</sub>Er<sub>0.25</sub>Tm<sub>0.25</sub>)<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> or 4(YSET)<sub>0.25</sub> disilicate was fabricated through a solid-solution method to protect the underlying SiC substrate from harsh environment at elevated temperature. XRD analysis showed that the newly fabricated 4(YSET)<sub>0.25</sub> exactly matched with the constituent base Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> having a single stable <i>β</i> phase. The microstructure analysis showed that the powder was uniformly mixed. A CMAS exposure test was done to check the corrosion properties of 4(YSET)<sub>0.25</sub> at 1300 °C for 4 h and 48 h. The 4(YSET)<sub>0.25</sub> showed better resistance against CMAS after 48 h at 1300 °C, and a negligible amount of Ca was able to penetrate toward the 4(YSET)<sub>0.25</sub> substrate. The overall performance of 4(YSET)<sub>0.25</sub> against CMAS was far better than their single constituent elements.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"102 2","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-025-10330-w","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
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Abstract
A novel high-entropy rare earth (Yb0.25Sc0.25Er0.25Tm0.25)2Si2O7 or 4(YSET)0.25 disilicate was fabricated through a solid-solution method to protect the underlying SiC substrate from harsh environment at elevated temperature. XRD analysis showed that the newly fabricated 4(YSET)0.25 exactly matched with the constituent base Yb2Si2O7 having a single stable β phase. The microstructure analysis showed that the powder was uniformly mixed. A CMAS exposure test was done to check the corrosion properties of 4(YSET)0.25 at 1300 °C for 4 h and 48 h. The 4(YSET)0.25 showed better resistance against CMAS after 48 h at 1300 °C, and a negligible amount of Ca was able to penetrate toward the 4(YSET)0.25 substrate. The overall performance of 4(YSET)0.25 against CMAS was far better than their single constituent elements.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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