摘要
制备了分别含有氧化铝、氧化硅、碳化硅、氧化钛和金刚石5种不同纳米颗粒的复合刷镀层,测试了各复合刷镀层的硬度、耐磨性、抗接触疲劳性能及高温性能,并探讨了纳米颗粒复合刷镀层的强化机制.结果表明:纳米颗粒复合刷镀层的硬度是不含纳米颗粒的快速镍刷镀层的1.5～1.7倍、耐磨性是1.6~2.5倍,抗接触疲劳寿命提高到106周次、可服役温度提高到400 oC;纳米颗粒复合刷镀层的强化机制主要为细晶强化、弥散强化和位错强化.
Five composite coatings containing different nanoparticles, such as n-Al2O3/Ni、n-SiO2/Ni、n-SiC/Ni、n-TiO2/Ni、n-Diam/Ni, were prepareded by electro-brush plating technique. Their hardness, wear resistance , contact-fatigue resistance and high-temperature properties were determined, and the strengthening mechanism was also discussed. The composite coatings showed hardness of 1.5~1.7 times that of the Ni coating without nanoparticles, and wear resistance of 1.6~2.5 times that of the Ni coating. Their contact fatigue life could reach 106 cycles, and service temperature could be up to 400C. The strengthening mechanism of the composite coatings mainly involved fine-crystal effect, nanoparticle dispersion effect and dislocation effect.
出处
《中国表面工程》
EI
CAS
CSCD
2003年第3期17-21,共5页
China Surface Engineering
基金
国家973项目子项目(G1999065009)
国家自然科学基金重点项目(50235030)
中英政府科技合作项目(2002/209M3)
装备维修研究与改革项目(2001ZB06)
关键词
纳米颗粒
刷镀层
性能
强化机制
nanoparticles
electro-brush plated coatings
properties
strengthening mechanism
