润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2014年
3期
18-21
,共4页
电沉积%纳米晶%钴-镍合金%摩擦学性能
電沉積%納米晶%鈷-鎳閤金%摩抆學性能
전침적%납미정%고-얼합금%마찰학성능
eletrodeposition%nanocrystalline%Co-Ni alloy%triobological property
采用直流电、单脉冲和双脉冲制备纳米晶钴-镍（Co-Ni）合金薄膜。用原子力显微镜（AFM）和表面轮廓仪分析薄膜表面形貌与表面粗糙度，用MV-2T显微硬度计测试薄膜的硬度，用球盘式摩擦磨损试验机的评价Co-Ni合金薄膜的摩擦磨损性能，用扫描电子显微镜分析Co-Ni合金薄膜的摩擦磨损机制。研究发现，电沉积技术显著影响纳米Co-Ni薄膜的表面形貌、硬度和摩擦磨损性能与机制。直流电制备的Co-Ni合金薄膜柱状晶较粗，硬度较小，但其表面粗糙度较小；双脉冲制备的纳米Co-Ni合金薄膜柱状晶较细，硬度最高，且表面粗糙度最小。双脉冲制备的纳米晶Co-Ni合金薄膜的磨损率比直流电制备的降低了近一个数量级，直流电制备的Co-Ni合金的磨损机制为严重黏着磨损和磨粒磨损，而双脉冲制备的Co-Ni合金薄膜表现为轻微的疲劳磨损和磨粒磨损。
採用直流電、單脈遲和雙脈遲製備納米晶鈷-鎳（Co-Ni）閤金薄膜。用原子力顯微鏡（AFM）和錶麵輪廓儀分析薄膜錶麵形貌與錶麵粗糙度，用MV-2T顯微硬度計測試薄膜的硬度，用毬盤式摩抆磨損試驗機的評價Co-Ni閤金薄膜的摩抆磨損性能，用掃描電子顯微鏡分析Co-Ni閤金薄膜的摩抆磨損機製。研究髮現，電沉積技術顯著影響納米Co-Ni薄膜的錶麵形貌、硬度和摩抆磨損性能與機製。直流電製備的Co-Ni閤金薄膜柱狀晶較粗，硬度較小，但其錶麵粗糙度較小；雙脈遲製備的納米Co-Ni閤金薄膜柱狀晶較細，硬度最高，且錶麵粗糙度最小。雙脈遲製備的納米晶Co-Ni閤金薄膜的磨損率比直流電製備的降低瞭近一箇數量級，直流電製備的Co-Ni閤金的磨損機製為嚴重黏著磨損和磨粒磨損，而雙脈遲製備的Co-Ni閤金薄膜錶現為輕微的疲勞磨損和磨粒磨損。
채용직류전、단맥충화쌍맥충제비납미정고-얼（Co-Ni）합금박막。용원자력현미경（AFM）화표면륜곽의분석박막표면형모여표면조조도，용MV-2T현미경도계측시박막적경도，용구반식마찰마손시험궤적평개Co-Ni합금박막적마찰마손성능，용소묘전자현미경분석Co-Ni합금박막적마찰마손궤제。연구발현，전침적기술현저영향납미Co-Ni박막적표면형모、경도화마찰마손성능여궤제。직류전제비적Co-Ni합금박막주상정교조，경도교소，단기표면조조도교소；쌍맥충제비적납미Co-Ni합금박막주상정교세，경도최고，차표면조조도최소。쌍맥충제비적납미정Co-Ni합금박막적마손솔비직류전제비적강저료근일개수량급，직류전제비적Co-Ni합금적마손궤제위엄중점착마손화마립마손，이쌍맥충제비적Co-Ni합금박막표현위경미적피로마손화마립마손。
Nanocrystalline Co-Ni alloy coatings were prepared by direct current(DC),unipolar and bipolar pulse elec-trodeposition techniques.The surface morphology and surface roughness of the coatings were characterized with atomic force microscope(AFM)and a surface profile measurement system.The microhardness was measured on a MV-2T Vickers micro-hardness tester.The friction and wear properties of the coatings wear evaluated using a ball-on-disc tribometer and their worn surfaces were studied by SEM to illustrate their wear mechanisms.The results show that the morphology,hardness and the tribological properties of the nanocrystalline Co-Ni coatings are significantly affected by the electrodeposition tech-niques.DC electrodeposition results in the as-prepared Co-Ni coating having low surface roughness,low hardness,and the columnar crystal with big size.The Co-Ni coating produced by the bipolar pulse electrodeposition exhibits the highest hard-ness,the smallest surface roughness,and the columnar crystals with the smallest size.The wear resistance of the Co-Ni coating produced by the bipolar pulse electrodeposition is improved almost one order of magnitude when compared to the Co-Ni coating produced by DC eletrodeposition.The coating produced by DC eletrodeposition exhibits the severely adhesive and abrasive wear during the sliding process.However the coating produced by bipolar pulse eletrodeposition exhibits the slightly fatigue and abrasive wear.
