- 學位論文
電氧化製程參數對鈦金屬鍍膜性質影響之探討
The Study of Electro-oxidation Process Parameters on the Titanium Coating Properties
摘要
為了解在微弧氧化以及陽極處理的差異性，本論文先針對電氧化在不同的製程參數以及不同加工時間下對純鈦金屬所生成的氧化膜性質比較。透過試片表面顏色、SEM表面形貌圖、表面粗糙度、微硬度、EDX元素成分分析，來了解不同的製程參數對於膜層的形成影響。 本實驗分成兩個部分，第一個部分主要討論直流與脈衝條件在定電壓350V下對於膜層的關係表現，而直流與脈衝參數設定為占空比(Duty ratio，Dr)分別為100%、67%、50%、33%、20%。而加工時間採用作用時間(acting time，Ta)為10、30、60、90s，藉以來觀察膜層成長變化的狀況。實驗結果發現Duty ratio為50%的時候在此電壓條件下，表面膜層最為平整。而占空比為33%則是觀察到的熔融現象最為明顯。 第二部分主要討論脈衝條件在不同電壓下的長膜狀況，為了更近一步探討電壓，故選擇了一組直流以及兩組脈衝條件。分別是占空比為99%、50%、33%在不同的電壓100V以及600V的狀況下隨作用時間為10、30、60、90s的膜層變化狀況。藉以了解電壓在不同脈衝條件下對膜層的成長影響。結果發現在100V的電壓條件下，直流以及脈衝條件對於膜層沒有太大的改變。而在600V的電壓條件下，三種參數轉化成類似陶瓷氧化膜，但占空比為99%所形成的膜層表面高低差較多，且孔洞較大。而占空比為50%所形成的膜層表面最為均勻且孔洞數少。 在低電壓以及作用時間短的時候，直流與脈衝的條件對於膜層的成長影響並不是很大，只有在作用時間長以及高電壓等大能量累積的情況，直流與脈衝隊表面的才會漸漸產生差別。並且在高電壓的情況下，電解液的離子會少許的熔入膜層表面裡。
並列摘要
It’s compared the qualities of the titanium oxide layer modified by electro-oxidation under different process conditions, they were comapared with applied voltage, acting time, and duty ratio of voltage pulse. From obeservating the surface color, surface topography of SEM, surface roughness, microhardness, elemental composition analysis of EDX,it is shown impact of the different process conditions to the qualities of titanium oxide layer. Moreover, it can be demonstrated the optimization conditions to generate the titanium oxide layer by electro-oxidation. The experiments are divided into the two parts. In the first part, it was designed to the five duty ratio conditions at the constant voltage 350V，and four acting time 10、30、60、90s as the acting time were chosen to observe the film quality. The results show that generating the best ceramic oxide film at duty ratio is 50%., it has the most obvious characteristics of melting surface at duty ratio is 33% In second part, the good pulse conditions of film growth at different voltages. To determine the good pulse conditions, we pick the results of first experiment. Duty ratio were 99%、50%、33% at different voltage 100V and 600V, and the acting time is the same as first part. It was found that at 100 V, all duty ratio have no different in film. At 600V, all duty ratio can convert film to the ceramic oxide film, but when Duty ratio is 100%, it has bigger cavities and large height difference. Hence, it forms the most uniform surface of film and less cavities at Duty ratio of 50%. Therefore, all duty ratio have no significant effect on the growing influence of the film at low voltage or short acting time. However, the difference of duty ratio will gradually make the difference in surface of film at high voltage or long acting time. Eventually, electrolyte ions will melt into the surface of film at high voltage condition