安宇龙,陈建敏,周惠娣,魏家俊.莫来石/SiO2复合涂层的制备及微观组织研究[J].表面技术,2010,39(5):1-3,76
莫来石/SiO2复合涂层的制备及微观组织研究
Preparation and Microstructure of Mullite/SiO2Composite Coating
投稿时间:2010-06-23  修订日期:2010-10-10
DOI:
中文关键词:  红柱石  莫来石  喷雾干燥  大气等离子喷涂
英文关键词:andalusite  mullite  spray-dry  atmosphere plasma spray
基金项目:国家自然科学基金委创新研究群体科学基金资助项目(50421502)
作者单位
安宇龙 1.中科院兰州化学物理研究所固体润滑国家重点实验室,兰州730000;2.中国科学院北京研究生院,北京100049 
陈建敏 中科院兰州化学物理研究所固体润滑国家重点实验室,兰州730000 
周惠娣 中科院兰州化学物理研究所固体润滑国家重点实验室,兰州730000 
魏家俊 甘肃紫鑫矿业煤化工有限公司,兰州730000 
AuthorInstitution
AN Yu-long 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China;2.Graduate School of Chinese Academy of Science, Beijing 100049, China 
CHEN Jian-min State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China 
ZHOU Hui-di State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China 
WEI Jia-jun Gansu Zixin Mining Industry and Coal Chemistry Industry Company Ltd., Lanzhou 730000, China 
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中文摘要:
      以天然红柱石为原料,采用高温煅烧使其发生莫来石化转变,然后经喷雾造粒、热处理,得到热喷涂用球形莫来石/SiO2复合粉末。采用大气等离子喷涂工艺在1Cr18Ni9Ti不锈钢上喷涂莫来石/SiO2粉末制得涂层,对涂层的微观组织、硬度和相成分进行了分析。研究结果表明:天然红柱石粉末莫来石化后,其相组成主要为莫来石和游离态SiO2;喷雾造粒粉末在1 000℃热处理后,松装密度得到改善;涂层具有良好的微观形貌,表面显微硬度较高,主要由莫来石、石英和非晶玻璃相构成。
英文摘要:
      Natural andalusite powders as raw material were heated at high temperature in air allowing mullitization. The resultant mullitized powder was spray-dried and heat treated to attain spherical mullite/SiO2composite powder. The mullite/SiO2composite powder was then plasma sprayed onto stainless steel(1Cr18Ni9Ti)to form coatings. The microstructural, microhardness and phase structure of as-sprayed mullite coatings were analysed. Results show that the mullitized andalusite powder consists of mullite and a small amount of free SiO2. The apparent density of spray-dried powders is improved after thermal treatment at 1 000℃ .The as-sprayed coating has fine microstructure and higher microhardness. The phase component of as-sprayed coating consistes of crystalline mullite, quartz and amorphous glass phase.
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