陕西科技大学学报（自然科学版）2008，Vol.26Issue(3)：11-14,44,5.
水热电泳沉积法制备硅酸钇涂层
OXIDATION RESISTANT YTTRIUM SILICATES COATINGS PREPARED BY A HYDROTHERMAL ELECTROPHORETIC DEPOSITION PROCESS FOR C/C COMPOSITES
摘要
Abstract
Yttrium silicates coatings were deposited on SiC-C/C composites surface by a noval hydrothermal electrophoretic deposition process using yttrium silicates nano-crystallites,iso-propanol and siodine as source materials,solvent and charging agent,respectively. The yt-trium silicates nano-crystallites were pre-prepared by a sonochemical process. Phase compo-sitions,surface and cross-section microstructures of the as-prepared multi-coatings were characterized by XRD and SEM. The influences of deposition temperatures on the micro-structures and oxidation resistance of the yttrium silicates coatings were particularly investi-gated. Results show that the as-prepared coatings are composed by yttrium silicates crystal-lites with the main phase of Y2Si2O7. The thickness and the density of the yttrium silicates coatings improve with the increase of deposition temperatures. Compared with SiC coating prepared by pack cementation,the multi-layer coatings prepared with a later hydrothermal electrophoretic deposition process exhibit better anti-oxidation property. The as-prepared multi-coatings could effectively protect C/C composites from oxidation at 1 773 K in air for 35 h with a weight loss of 0. 32×10-3 g/cm2.关键词
碳/碳复合材料/硅酸钇/水热电泳沉积Key words
carbon/carbon composites/yttrium silicates/hydrothermal electrophoretic depo-sition分类
通用工业技术引用本文复制引用
刘淼,黄剑锋,柳泽和道,张玉涛,邓飞,曹丽云,吴建鹏..水热电泳沉积法制备硅酸钇涂层[J].陕西科技大学学报（自然科学版）,2008,26(3):11-14,44,5.基金项目
国家自然科学基金(50772063)、教育部"新世纪优秀人才支持计划"(NECT-06-0893)和教育部博士点基金(20070708001)资助课题 （50772063）
