超音速等离子喷涂层的组织及性能分析  

Microstructure and mechanical properties of supersonic plasma sprayed coating

作　　者：王海斗[1] 徐滨士[1] 姜祎[1,2] 刘明[1] 孙明喜[2] 

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]海军飞行学院,葫芦岛125101

出　　处：《焊接学报》2011年第9期1-4,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金重点资助项目(50735006);国家自然科学基金面上项目(50675223);国家973计划资助项目(2007CB607601);国家科技支撑计划资助项目(2008BAK42B03)

摘　　要：用超音速等离子喷涂技术制备了NiCrBSi涂层,并对涂层的组织性能进行了综合分析.用扫描电镜和能谱仪分析了涂层的内部组织,用纳米压痕法测试了硬度和弹性模量,用拉伸试验法测试了涂层与基体的结合强度,用X射线应力仪测定了涂层沿厚度方向的残余应力的分布.结果表明,涂层内部比较均匀,具有较低的孔隙率和氧化物含量,涂层的纳米显微硬度达到15 GPa,纳米弹性模量达到200 GPa,涂层与基体的结合强度接近50 MPa,涂层具有很好的耐磨性和优异的力学性能.涂层内部分布着拉应力状态的残余应力,其随着距离涂层顶部距离的增加而逐渐降低.NiCrBSi coating was sprayed by supersonic plasma spraying technology,and microstructure and mechanical properties of NiCrBSi coating were analyzed.Microstructure of coating was investigated by scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS),hardness and elastic modulus were measured by nano-indention method.Bonding strength between coating and substrate was investigated by tensile test.The distribution of residual stress alongside the coating thickness was measured by X-ray diffraction method.The results showed that the coating structures were uniform and had a low porosity and oxide.Nano-hardness was near to 15 GPa,nano elastic modulus was 200 GPa and boding strength was close to 50 MPa.It is concluded that the coating has good wear-resistance and excellent mechanical properties.Residual stress in the coating is tensile,and decreases with the incrense of the distance from the coating surface.

关 键 词：超音速等离子喷涂 残余应力 微观组织 力学性能 

分 类 号：TG156.99[金属学及工艺—热处理]