电热爆炸喷涂法制备TiC涂层的特性分析  

TiC coating by sprayed electrothermal explosion

作　　者：黄强[1] 刘宗德[1] 安江英[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2009年第5期46-49,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：采用电热爆炸定向喷涂工艺在镍合金基体上制备TiC涂层,借助光学显微镜、显微硬度计分别对涂层显微组织、涂层硬度进行了测试。利用图像分析软件对涂层的晶粒尺寸进行了测量。结果表明,电热爆炸定向喷涂制备的涂层组织晶粒明显细化,涂层组织为典型的快速凝固组织。涂层组织比原始喷涂材料镍合金组织细小、均匀;TiC涂层中大晶粒所占涂层面积为93.6%,小晶粒所占面积为6.4%;大晶粒的弦长平均值为500 nm左右,小晶粒的弦长平均值为81 nm左右;表层有些孔隙;涂层硬度均明显高于基体材料镍合金的硬度,其最高硬度达到了582.5 HV。Preparationing of TiC coating on Nickel alloy by novel electrothermal explosion spray. Mierostructure and interface bonding status of TiC coating were analyzed by optical microscope and micro- hardness tester. Use of image analysis software to measure the grain size of coatings . Results show that the Organization of the grain of coating is obvious thin; and the Coating was a typical rapid organizationthe of the solidification organization of Spray coating material was smaller and uniformer than the original nickel alloy . The area of Large - Grained of TiC coating was 93. 6%, while the size of Proportion of small grain was 6. 4% ; The.average chord length of Large grains was about 500 nm, while the average chord length of the small grains was about 81 nm . The coating was dense with some holes in the surface; The hardness of Coating was significantly higher than the nickel alloy material, the maximum The hardness of Coating was up to 582. 5HV.

关 键 词：电热爆炸喷涂 TIC涂层 显微组织 

分 类 号：O389[理学—流体力学]