激光熔覆Zr_(65)Al_(7.5)Ni_(10)Cu_(17.5)复合涂层组织结构  

Microstructure of Zr_(65)Al_(7.5)Ni_(10)Cu_(17.5) composite coatings produced by laser cladding

作　　者：李刚[1] 王彦芳[1] 王存山[1] 夏元良[1] 董闯[1] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室,大连116023

出　　处：《激光技术》2003年第1期21-23,共3页Laser Technology

摘　　要：在Ti基体上激光熔覆Zr65Al7.5Ni10 Cu17.5合金粉末 ,得到含非晶、纳米晶复合涂层。涂层由金属间化合物和非晶、纳米晶构成。涂层按组织形貌分为 3层 :表面枝晶区、中部细晶区和结合区枝晶区。金属间化合物为Al2 Zr3 ,CuZr2 和Zr2 Ni,纳米晶为简单四方Al2 Zr3 相 ,晶格常数为 :a =b=76 .18nm ,c =6 9.85nm。Zr 65 Al 7.5 Ni 10 Cu 17.5 composite coatings on a Ti substrate were produced by laser cladding. The micro- structure of the coating was investigated by means of SEM,TEM and XRD. The results show that the coatings mainly consist of intermetallic phases,amorphous phase and nanocrystallitic phase.The intermetallic phases are Al 2Zr 3,CuZr 2 and Zr 2Ni.The nanocrystallitic phase is Al 2Zr 3 with P4 2 structure,whose cell parameters are a=b =76.18nm, c =69.85nm. The coating can be divided into three layers according to the difference of microstructure morphology:dendrite zone on the surface,fine crystallitic zone in the middle and bonding zone.

关 键 词：复合涂层 激光熔覆 ZR65AL7.5NI10CU17.5 金属间化合物 非晶 纳米晶 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]