- 學位論文
無電鍍鎳對經微弧氧化處理之7075鋁合金耐磨耗特性
Electroless nickel plating on wear resistance of 7075 aluminum alloy by micro-arc oxidation
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摘要
本實驗以7075鋁合金經過微弧氧化表面改質的試片為基材，使用無電鍍鎳方式進行四種不同析鍍時間之處理，然後進一步分析與比較無電鍍鎳膜層的特性如結構、粗糙度、硬度等，了解無電鍍鎳對基材的機械性質及耐磨特性的影響。因析鍍時間長短造成無電鍍鎳鍍層的厚度不同，結果顯示隨著鍍層厚度的上升，試片硬度逐漸上升，磨耗的損失因硬度上升而減少。經由掃描式電子顯微鏡觀察其表面形貌，發現析鍍時間越長有較大表面顆粒，表面粗糙度應是隨之上升，但量測時顯示數據無法得證，而在觀察斷面之顯微結構時，鍍層會隨著微弧氧化的多孔層形成，導致鎳層表面起伏造成表面粗糙度不會隨著鍍層厚度增加而上升。
並列摘要
In this study, micro-arc oxidation of 7075 aluminum alloy was used as substrate to deposit ENi plating with the different time by electroless nickel technology. And then characteristics of electroless nickel plating, such as structure, roughness and hardness behaviors of the plated specimens were analyzed and compared. Mechanical properties and wear resistance were analyzed in order to understand the effect of ENi plating for the specimens. The plating thickness is increased with increasing hardness, , and wear resistance also increased because hardness. Microstructures of surface can be observed that plating time increased with increasing the surface of particles. The surface roughness should rise in theory, but the results were not. Observed the section of microstructure found plating with the micro-arc oxidized layer formation. ENi plating surface relief caused by surface roughness does not increase with increasing thickness of the coating.
參考文獻
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