中文摘要：

采用冷喷涂技术制备了CoNiCrAlY过渡层及厚度约40μm的YSZ涂层,通过SEM、XRD、TEM观察了冷喷涂层的显微结构、物相组成、YSZ涂层及CoNiCrAlY过渡层的界面形貌及晶粒取向,通过金相显微镜、电子万能试验机测试了YSZ涂层的孔隙率、结合强度。研究发现,冷喷涂技术制备的热障涂层为明显的颗粒状结构,孔隙率仅约1.8%,远低于等离子喷涂相同材质涂层的孔隙率（约12.5%）。在冷喷涂高应变速率条件下,YSZ涂层与CoNiCrAlY过渡层界面实现了冶金结合,涂层界面比较稳定,结合强度达40 MPa。

英文摘要：

YSZ top coat with thickness about 40 μm and Co Ni Cr Al Y bond coat were prepared with the cold spray technology. Scanning electron microscope（ SEM）,X-ray diffraction（ XRD） and transition electron microscope（ TEM）were used to characterize the cold sprayed coating in terms of microstructure,phase constitution,interface bonding and grain orientation of cold sprayed coatings,respectively. Metallographic microscope and electronic tensile testing machine were used to characterize porosity and bonding strength of YSZ coatings. Dissimilar to plasma spray YSZ coatings with typical lamellar structure and high porosity up to 12. 5%,thermal barrier coatings fabricated by cold spray technology with porosity of just 1.8% showed an obvious granular structure. By the technique of cold spraying at high strain rate,a metallurgical bonding was realized between YSZ top coat and Co Ni Cr Al Y bond coat,with interface relatively stable and bonding strength up to 40 MPa.