高效能超音速等离子喷涂制备NiCr-Cr_3C_2涂层特点  

Property Investigation of NiCr-Cr_3C_2 Coating Deposited by Supersonic Plasma Spray

作　　者：王海军[1] 杨振凯[1] 刘明[1] 李国禄[2] 许中林 王晶晨 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072 [2]河北工业大学材料科学与工程学院,天津300130

出　　处：《热喷涂技术》2015年第1期21-26,共6页Thermal Spray Technology

基　　金：国家自然科学基金(51175513);国家自然科学基金(51275151)

摘　　要：采用高效能超音速等离子喷涂系统(HEPJet)制备了Ni Cr-Cr3C2涂层,并对涂层性能进行了测试。结果表明采用高效能超音速等离子喷涂方法制备的Ni Cr-Cr3C2涂层结构致密,孔隙率约为1%左右,显微硬度约为986HV0.3,涂层具有明显的双相结构。EDS分析结果认为,涂层由Ni Cr和Cr3C2相交替组成。Ni Cr-Cr3C2涂层的结合强度达到68MPa,与超音速火焰(HVOF)喷涂制备的Ni Cr-Cr3C2涂层结合强度相近。超音速等离子喷涂Ni Cr-Cr3C2涂层的沉积效率测定结果约为63.8%。The NiCr-CraC2coating was fabricated by high efficiency plasma spraying technology. The properties, such as bonding strength, micro-hardness, micro-structure et al were measured. Results show that the NiCr-Cr3C2 coating is deposited with high density, the micro-hardness of the coating is 986HV03 and the porosity is about 1% measured by image analysis （IMA） method. The SEM results shows that the coating is constituted with two-phase, the bright phase is mainly composited with NiCr, while the gray phase is mainly composited with CraC2 analysis by EDS. The bonding strength of the NiCr-Cr3C2 coating is about 68MPa.Which is close to the NiCr-Cr3C2 coating deposited by high velocity of fuel （HVOF）. The deposition efficiency of NiCr-Cr3C2 coating is about 63.8%.

关 键 词：超音速等离子喷涂 NiCr-Cr3C2 结合强度 XPS 

分 类 号：TG174.4[金属学及工艺—金属表面处理]