激光重熔处理对含Al、Ti、TiO_2等离子喷涂热障涂层组织的影响  

Effect of Laser remelting on Structure of Plasma sprayed TBCs with Al,Ti and TiO 2

作　　者：陈国锋[1] 李金士 冯钟潮[3] 

机构地区：[1]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室,沈阳110015 [2]沈阳钢丝厂,沈阳110041 [3]中国科学院金属研究所,沈阳110015

出　　处：《金属热处理》1999年第9期10-11,共2页Heat Treatment of Metals

摘　　要：利用激光对含 Ａｌ、 Ｔｉ、 Ｔｉ Ｏ２ 等离子喷涂热障涂层进行了重熔处理。与不含 Ａｌ、 Ｔｉ、 Ｔｉ Ｏ２ 激光重熔 Ｚｒ Ｏ２ 涂层相比，一方面晶粒得到细化，另一方面由原来的柱状结构变为胞状结构。能谱分析结果表明， Ａｌ、 Ｔｉ 在胞晶之间发生了偏析。Plasma sprayed TBCs with Al,Ti and TiO 2 was remelted by laser.Much finer grain of ZrO 2 was obtained and cellular microstructure but not columnar microstructure which is the characteristic of laser remelting ZrO 2 without additive was also obtained.EDAX results showed that Al,Ti were segregated in the grain boundary.The effect of the additive on the microstructure was evaluated.

关 键 词：激光重熔 热障涂层 胞状结构 等离子喷涂 

分 类 号：TG174.442[金属学及工艺—金属表面处理]