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Preparation and characterization of a sodium polyacrylate/sodium silicate binder used in oxidation resistant coating for titanium alloy at high temperature
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发布时间： 2019-03-09
发布时间：2019-03-09
论文类型：期刊论文
发表时间：2012-11-01
发表刊物：POWDER TECHNOLOGY
收录刊物：Scopus、EI、SCIE
卷号：230
页面范围：134-138
ISSN号：0032-5910
关键字：Titanium alloy; Glass-ceramic coating; Sodium polyacrylate/sodium silicate binder; Oxidation resistance
摘要：A sodium polyacrylate/sodium silicate binder used in oxidation resistant coating was investigated, and its effect on oxidation behavior of titanium alloy was studied at 800 degrees C in air. Glass-ceramic coating slurry mixed with the binder had good dispersity and stability. The coating was deposited on Ti-6Al-4V titanium alloy through the slurry-dipping method. Better oxidation resistance was obtained at an elevated temperature, and the thickness of the alpha-case layer was reduced by 71%. The microstructure of the binder consisted of spherical molecules, large molecules, and a stick organization. The phase was composed of several crystalline phases and an amorphous phase. At a temperature range of 100 degrees C to 1200 degrees C. the total weight loss was 28.3%. A stable state could be obtained at above 700 degrees C, which ensured a perfect barrier for protecting the alloy from oxidation. During cooling, the coating can be peeled off easily because of the mismatched coefficient of thermal expansion between the glass and substrate, and the carbon oxidation of the binder. (C) 2012 Elsevier By. All rights reserved.

付雪松

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性别： 男

毕业院校：大连理工大学

学位： 博士

所在单位：材料科学与工程学院

学科：材料加工工程

办公地点： 大连理工大学铸造中工程心

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