摘要
采用化学镀的方法在Al2O3颗粒表面包覆镍或铜,研究了颗粒包覆对Al2O3/青铜复合材料界面结合模式及性能的影响。XRD结果表明,包镍后,复合材料的界面有化学反应发生,生成Ni2Al3相,复合材料的界面结合强度因此而增加;包铜后,复合材料的界面无化学反应发生,但因机械锁合作用加强,也使复合材料的界面结合加强。颗粒包覆使复合材料的界面结合模式改善。研究表明,Al2O3颗粒表面包覆镍或铜对复合材料的致密度和力学性能(硬度。
Al_2O_3 particles were coated with nickel or copper by means of electroless plating technique in this study The influence of metallic coatings of Al_2O_3 particles on the interface structural models and properties of Al_2O_3bronze composite was studied XRD results indicated that a intermetallic compound Ni2Al3 existed at the interface of the nickelcoated Al2O3bronze composite due to a chemical reaction, thus increasing the interfacial bonding strength Coppercoated Al2O3bronze composite, without chemical reaction, also exhibited some increased interfacial bonding strength due to a tighter interlocking between matrix and coated reinforcement Furthermore, composite with coated particles had better interfacial structure than that had uncoated ones Results showed metallic coatings on the surface of Al2O3 particles could greatly affect the density, hardness, tensile strength and wear resistance of the composite
出处
《材料工程》
EI
CAS
CSCD
北大核心
1998年第3期3-6,共4页
Journal of Materials Engineering
基金
国家教委博士点基金
关键词
金属基
复合材料
青铜
界面结构模式
氧化铝
electroless plating metal matrix composites Al2O3 particles bronze interface structural model