Yao-Can Zhu, Y. Zhang, X. Li, K. Fujita, N. Iwamoto
{"title":"The Influence of Magnetron-sputtered SiO2 Coatings on the Cyclic Oxidation Behavior of γ-TiAl Alloys","authors":"Yao-Can Zhu, Y. Zhang, X. Li, K. Fujita, N. Iwamoto","doi":"10.2320/MATERTRANS1989.41.1118","DOIUrl":null,"url":null,"abstract":"A SiO 2 coating of about 2 μm was deposited onto γ-TiAl alloys by using a magnetron-sputtering coating method. The cyclic oxidation behavior of γ-TiAl alloys was investigated at 1123 K in air. The uncoated γ-TiAl specimen showed a high oxidation rate during the initially transient period of up to 220 ks, after which, a rapid mass loss was observed due to the partial scale spallation. In contrast, the SiO 2 -coated TiAl specimen exhibited an extremely low oxidation rate. It was found that the SiO 2 coating acted as an external barrier coating, thereby being capable of significantly suppressing the oxidation of γ-TiAl alloys.","PeriodicalId":18264,"journal":{"name":"Materials Transactions Jim","volume":"219 1","pages":"1118-1120"},"PeriodicalIF":0.0000,"publicationDate":"2000-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Transactions Jim","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2320/MATERTRANS1989.41.1118","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
Abstract
A SiO 2 coating of about 2 μm was deposited onto γ-TiAl alloys by using a magnetron-sputtering coating method. The cyclic oxidation behavior of γ-TiAl alloys was investigated at 1123 K in air. The uncoated γ-TiAl specimen showed a high oxidation rate during the initially transient period of up to 220 ks, after which, a rapid mass loss was observed due to the partial scale spallation. In contrast, the SiO 2 -coated TiAl specimen exhibited an extremely low oxidation rate. It was found that the SiO 2 coating acted as an external barrier coating, thereby being capable of significantly suppressing the oxidation of γ-TiAl alloys.
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