【作者】 张强； 王秀茹； 杨冠军； 李成新； 李长久；

【Author】 Qiang Zhang Xiu-Ru Wang Guan-Jun Yang Cheng-Xin Li Chang-Jiu Li (State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an,710049,China)

【机构】 西安交通大学金属材料强度国家重点实验室材料科学与工程学院；

【摘要】 以Ni与Al原子比为1:1的镍铝混合粉末为喷涂粉末,通过冷喷涂在IN738镍基高温合金基体上制备Ni//Al复合涂层,EDS分析表明,复合涂层中的Ni和Al的原子比约为2:3。对复合涂层进行热扩散处理,采用扫描电镜观察涂层的断面组织,结果表明,热扩散涂层组织均匀并且致密。XRD分析结果表明,Ni/ Al复合涂层经热扩散处理后,涂层内部主要是Ni₂Al₃,与涂层的原始成分基本相当,这表明热扩散处理原位反应可以获得金属间化合物涂层。更多还原

【Abstract】 Ni/Al composite coating was deposited on the super -alloy Inconel 738 substrate by cold spraying using Ni/Al.mixed powder with atomic ratio 1:1.The microstructure,composition and phase composition of the Ni/Al composite coating and NiA1 thermal-diffused coatings was characterized by scanning electron microscopy,EDS and X-ray diffraction analysis.EDX analysis shows that Ni and A1 atomic ratio is roughly 2:3 in the composite coating.After thermal diffusion treatment,Ni/A1 composite coating with atomic ratio 1:1 converts to NiA1 intermetallic compound coating.The results show that Ni/Al composite coating converted to NiAI intermetallic compound coating composed of Ni₂Al₃ after thermal-diffused treatment.更多还原