电热爆炸喷涂NiAl-TiB_2复合涂层  

NiAl-TiB_2 composite coatings prepared by electro-thermal explosion spraying technology

作　　者：侯世香[1] 刘宗德[1] 刘东雨[1] 刘泽[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：《材料热处理学报》2013年第1期139-143,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(10772066);教育部重点项目(106053)

摘　　要：利用电热爆炸超高速喷涂设备,在镍基高温合金基体上喷涂了含TiB2分别为0、10和20%(质量分数,%)的NiAl复合涂层。分析结果表明涂层均由亚微米晶粒组成,涂层与基体间为冶金结合。加入TiB2显著的提高了NiAl的硬度。在1000℃的等温氧化实验结果表明,NiAl涂层的抗氧化性高于NiAl-TiB2复合涂层。NiA1-TiB2 composite coatings with 0, 10 and 20% TiB2 were prepared on Ni-based superalloy substrate using electro-thermal explosion ultrahigh speed spraying technology. The results show that the coatings consist of submicron grains. The bond between coatings and substrate is metallurgical binding. TiB2 as effective reinforcement is doped in NiA1, which increases its hardness. The isothermal oxidation tests at 1000 ℃ in air show that the oxidation resistance of NiA1 coating is higher than that of NiAl-TiB2 composite coatings.

关 键 词：电热爆炸喷涂 NiAl-TiB2复合涂层 显微组织 抗氧化性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]