摘要
通过复合电铸工艺制备Ni-ZrO2纳米复合电铸层,用SEM和TEM对其表面形貌、组织结构进行了分析。研究了镀液中纳米颗粒悬浮量对纳米复合电铸层在干摩擦状态下耐磨性的影响,并观察了纳米复合电铸层磨损后的表面形貌,探讨了磨损机理。结果表明:纳米ZrO2颗粒细化了基质金属的晶粒,使复合电铸层表面光滑平整;复合电铸层由微Ni单晶和多晶以及ZrO2颗粒所组成;纳米颗粒的强化作用使复合电铸层表现出优良的耐磨性,耐磨性的高低取决于纳米颗粒的复合量。
The Ni-ZrO2 nano-composite electroformings were prepared by composite electroforming.The surface morphology and microstructure were analyzed by SEM and TEM.Under dry friction conditions,the effect of nano-particle content in solution on the wear resistance of the nano-composite electroformings was studied.Furthermore,the surface morphology of worn surface and abrasion mechanism were investigated.The study results show that owing to the existence of nano-ZrO2 particles in the composite electroformings,the grain size of the metallic matrix is decreased greatly,and the nano-composite electroformings has a flat surface and compact microstructure.The nano-composite electroformings are composed by Ni single crystal and polycrystal,nano-ZrO2 particles.Because of the strengthening effect of nano-particle,nano-composite electroformings exhibit an excellent wear resistance,and changes in their abrasion mechanism take place.The wear resistance of nano-composite electroformings depends on nano-particle content in them.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2010年第4期21-24,共4页
Surface Technology
基金
江苏省高校自然科学重大基础研究资助项目(09KJA460001)
关键词
纳米复合电铸层
表面形貌
微观结构
耐磨性
磨损机理
nano-composite electroforming
surface morphology
microstructure
wear resistance
abrasion mechanism
