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

• Main Authors: Jui-hung Chang, 張瑞宏
• Other Authors: Chang, Yuh-Ping
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/6j6tbn

碩士 === 崑山科技大學 === 機械工程研究所 === 97 === 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.