气体爆燃喷涂铁铝涂层显微结构研究  

Study of microstructure of Fe-Al coating sprayed by gas detonation-gun

作　　者：辛钢[1] 高阳[2] 黑祖昆[2] 

机构地区：[1]大连理工大学化工学院,辽宁大连116024 [2]大连海事大学材料工艺研究所,辽宁大连116026

出　　处：《大连理工大学学报》2005年第2期191-193,共3页Journal of Dalian University of Technology

摘　　要：采用气体爆燃喷涂技术制备的铁铝涂层具有良好的耐蚀性能.该涂层与铁铝粉末原料相比较,其成分、结构均存在较大的差异.对该涂层的微观结构进行分析,能够为涂层的耐蚀性能研究提供可靠的实验依据.按照已确定的气体爆燃喷涂(DGS)工艺,制备了耐蚀的铁铝涂层.使用光学显微镜、XRD、TEM、电子探针分析了涂层的微观结构和各相的成分.结果表明,涂层中含有Fe4Al13、FeAl和Al2O3相;喷涂后原料粉末发生了复杂的相变,由Fe4Al13相大部分转变成为FeAl相组织和Al2O3合金颗粒,生成了非晶组织和细小晶粒组织;以上各相具有良好的耐腐蚀性能.The Fe-Al coating sprayed by gas detonation-gun has a good property of resistant-corrosion. Its microstructure and component are different from those of the raw Fe-Al powder. Study of microstructure of the Fe-Al coating could provide dependable evidence for the research on resistant-corrosion. So the best resistant-corrosion Fe-Al coating was sprayed by gas detonation-gun. The microstructure of the coating was studied with optical microscope, XRD and TEM. The ingredient was analyzed by the electronic microprobe. The results show that the coating consists of Fe4Al13, FeAl and Al2O3. FeAl and Al2O3 phases are transformed from the Fe4Al13 phase in the powder after spraying. Meanwhile the structures of non-crystal and micro-crystal are found in the coating. All of the phases in the coating have good property of resistant-corrosion.

关 键 词：气体爆燃喷涂 铁铝涂层 结构研究 Al2O3 电子探针分析 微观结构 FEAL 光学显微镜 粉末原料 喷涂技术 性能研究 原料粉末 合金颗粒 非晶组织 腐蚀性能 XRD TEM 相组织 制备 成分 

分 类 号：TG456.6[金属学及工艺—焊接] TG174.442