氮及氧氣作用下動態監控鈦表面反應生成物之研究

A study on dynamic monitoring the chemical reactions of titanium under oxygen and nitrogen gas flow

張瑞宏(Jui-hung Chang)

指導教授 ： 張育斌

共同指導教授 ： 周煥銘

崑山科技大學/工程學院/機械工程研究所/碩士(2009年)

摘要

由於鈦金屬在空氣中之化學反應物至少包括二氧化鈦及氮化鈦等組織，生成機制也相當複雜，至今學理依然不明。且由於鈦金屬在工業上之應用潛力很大，更值得進一步深入研究。本研究團隊過去已成功發展摩擦帶電機制成為動態監控金屬薄膜磨潤特性的新方法，並且發現不管是就靈敏性或判別性之考量，上述此種新方法均優於傳統以摩擦係數監控的方式，但卻因導電特性之限制而只侷限在導體對導體材料之配對。
因此，本研究擬進一步在上述理論基礎上利用往復摩擦試驗機暨量測系統，於動態的摩擦過程中，量測接觸電阻及摩擦係數，以動態監控鈦金屬之化學反應生成物。並且，在摩擦試驗後，使用精密微量天秤量測磨耗損失量，以及利用電子顯微鏡(SEM)觀察其微奈米級材料轉移之結構及組成成份。根據初步評估測試結果可知，同時動態量測接觸電阻及摩擦係數之實驗方法，確實可以動態監控鈦金屬界面之化學反應生成物與變化機制。

關鍵字

接觸電阻 ； 動態監控 ； 化學反應

並列摘要

The chemical reactions between the frictional interfaces for the titanium specimen in the air include at least two organizations: TiN and TiO2. Moreover, the chemical mechanisms are very complex and still unclear up to now. On the other hand, it is also well known that the titanium is very widely applied in the industry. Therefore, it is worth deeply investigating the dynamic chemical reactions of the titanium specimen in the friction process. Moreover, the variations of the tribo-electrification voltage had been successfully applied to monitor the tribological properties between the metal films by our laboratory members. In fact, the novel method of using continuous tribo-electrification variations for monitoring the tribological properties between the soft metal films is more “sensitive” and “discriminative” than that by the continuous friction coefficient variations as usual. However, this novel method was only suitable for the conduct materials.
Therefore, this study is based on the above results to further develop this novel method for dynamic monitoring the chemical reactions of titanium in the friction process. The experiment was conducted by the self-developed friction tester and its measure system. The dynamic electrical contact resistance and friction coefficient were measured for monitoring the chemical reactions of the titanium in the friction process. Moreover, the wear loss was measured by an accuracy balance and the SEM was used to observe the structures of material transfer after the friction test. According to the experimental results, the method of using dynamic electrical contact resistance and friction coefficient variations to monitor the chemical reactions of titanium is feasible.

並列關鍵字

Electrical contact resistance ； Dynamic monitoring ； Chemical reactions

參考文獻

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