{"title":"Microstructure and High Temperature Oxidation Behaviour of Zr-Doped Aluminide Coatings Fabricated on Nickel-based Super Alloy","authors":"I. Khakpour, R. Soltani, M. Heydarzadeh Sohi","doi":"10.1016/j.mspro.2015.11.011","DOIUrl":null,"url":null,"abstract":"<div><p>In recent years, addition of rare earth elements such as Zr, Y and Hf to pack diffused aluminide coatings has been studied and practiced aiming to improve high temperature oxidation resistance of the coatings. In this work cementation packs containing ZrOCl<sub>2</sub>.8H<sub>2</sub>O as the activator and source of zirconium as well as mechanically alloyed 30% Al -Cr compound as the source of aluminum plus alumina as filler material were used to produce zirconium doped aluminide coatings. The cyclic oxidation of the coatings was measured at 1100<!--> <!-->°C and each cycle was consisted of one hour heating in furnace and 10<!--> <!-->minutes cooling in the air.</p><p>The results showed that the Zr modified aluminide coatings provide a better resistance against high temperature oxidation and the highest resistance belonged to the coating that was achieved by 5<!--> <!-->hours diffusion process in a pack that contained 2% activator.</p></div>","PeriodicalId":101041,"journal":{"name":"Procedia Materials Science","volume":"11 ","pages":"Pages 515-521"},"PeriodicalIF":0.0000,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mspro.2015.11.011","citationCount":"17","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Procedia Materials Science","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2211812815003533","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 17
Abstract
In recent years, addition of rare earth elements such as Zr, Y and Hf to pack diffused aluminide coatings has been studied and practiced aiming to improve high temperature oxidation resistance of the coatings. In this work cementation packs containing ZrOCl2.8H2O as the activator and source of zirconium as well as mechanically alloyed 30% Al -Cr compound as the source of aluminum plus alumina as filler material were used to produce zirconium doped aluminide coatings. The cyclic oxidation of the coatings was measured at 1100 °C and each cycle was consisted of one hour heating in furnace and 10 minutes cooling in the air.
The results showed that the Zr modified aluminide coatings provide a better resistance against high temperature oxidation and the highest resistance belonged to the coating that was achieved by 5 hours diffusion process in a pack that contained 2% activator.
近年来，为了提高涂层的高温抗氧化性能，在扩散铝化物涂层中添加稀土元素Zr、Y和Hf进行了研究和实践。本文采用以ZrOCl2.8H2O为活化剂和锆源的胶结包，以及以机械合金化30% Al -Cr化合物为铝源，以氧化铝为填料的胶结包制备了掺锆铝化物涂层。在1100℃下测量涂层的循环氧化，每个循环由炉内加热1小时和空气冷却10分钟组成。结果表明，Zr改性铝化物涂层具有较好的耐高温氧化性能，在添加2%活化剂的包体中，经5小时扩散处理的涂层的耐高温氧化性能最高。
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