纳米α-Al_2O_3和γ-Al_2O_3颗粒增强镍-磷复合镀层的性能对比  

Properties Comparison of α-Al_2O_3 Particles and γ-Al_2O_3 Particles Reinfcrced Ni-P Nano-composite Coatings

作　　者：冷楠[1] 赵福国[1] 黄昊[1] 王登科[1] 董星龙(指导)[1] 

机构地区：[1]大连理工大学三束改性国家重点实验室,材料科学与工程学院,大连116023

出　　处：《机械工程材料》2009年第7期56-60,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金国际(地区)合作与交流资助项目(NS-FC-KOSEF)(50611140546);教育部“新世纪优秀人才支持计划”资助项目(NCET-05-0283)

摘　　要：采用化学镀技术制备了纳米α-Al2O3和γ-Al2O3颗粒增强的镍-磷复合镀层,利用X射线衍射仪、扫描电子显微镜、电子探针等对复合镀层的物相结构、表面形貌、成分分布进行了分析,还对比了复合镀层与镍-磷镀层的显微硬度、耐磨性和耐腐蚀性。结果表明:与镍-磷镀层相比,纳米Al2O3颗粒的加入没有改变镀层的晶体结构,但使镀层的显微硬度明显提高;纳米α-Al2O3颗粒的加入提高了镀层的耐腐蚀性和耐磨性,而纳米γ-Al2O3颗粒的加入反而使镀层耐磨性和耐腐蚀性下降。The α-Al2O3/Ni-P and Y-Al2O3/Ni-P nano-composite coatings were prepared by electroless deposition with embedded nanometer-sized α-Al2O3 and Y-Al2O3 particles. The phase structure, surface morphology and element distribution of nano-coatings were studied by means of XRD, SEM, EPMA. The micro-hardness, tribological properties and corrosion resistance were investigated and compared with those of Ni-P mating. The retults show that in comparison to the conventional Ni-P coating, the structure of the coating was not changed due to the addition of nano α-Al2O3 particles, but the co-deposited nano-coatings had higher micro-hardness. The wear resistance and corrosion resistance of the coating with nano α-Al2O3 particles were improved, but that with Y-Al2O3 were decreased.

关 键 词：化学镀 镍-磷镀层 纳米Al2O3颗粒 

分 类 号：TB43[一般工业技术]