Abstract: Zr₆₅Al_7.5Ni₁₀Cu_17.5 composite coatings on Ti substrate were produced by laser cladding. The microstructure of the coating was investigated by means of SEM，TEM and XRD. The results showed that the coatings mainly consisted of intermetallic phases，amorphous phase and nanocrystalline phase，of which the intermetallic phases were Al2Zr3，CuZr2 and Zr2Ni，and the nanocrystalline phase was Al2Zr3 with P42 structure，whose cell parameters were a=b=7.618 nm，c=6.985 nm. The coating could be divided into three layers according to the difference of microstructure morphology，viz，dendrite zone on the surface，fine crystalline zone in the middle，and bonding zone.

摘要： 在Ti基体上激光熔覆Zr₆₅Al_7.5Ni₁₀Cu_17.5合金粉末，得到含非晶、纳米晶复合涂层。分析表明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Al2Zr3、CuZr2和Zr2Ni，纳米晶为简单四方Al2Zr3相，晶格常数为：a=b=7.618 nm，c=6.985 nm。