Cu60Zr30Ti10塊狀非晶合金在300-500℃空氣下之氧化行為研究

The Oxidation Behavior of Cu60Zr30Ti10 Bulk Metallic Glass at 300-500℃

本研究主要在探討銅基非晶合金（Cu-30Zr-10Ti）及其晶質化合金（以下分別簡稱為Cu3與XCu3），在300-500℃空氣下之氧化行為。研究結果顯示，兩種合金之氧化動力學皆遵守拋物線型定律，且氧化速率隨溫度的上升而加快，而XCu3之抗氧化性優於Cu3非晶合金材料。由XRD分析結果得知，兩種合金之主要氧化生成物為CuO/Cu2O及少量立方晶之ZrO2，而Cu3亦生成少量ZrTiO4。。觀察Cu3在400℃氧化後之基材已有微量繞射峰生成，可知氧化的過程伴隨著相變化的發生。

A copper-base bulk metallic glass, Cu60Zr30Ti10 (Cu3), and its crystalline counterpart (XCu3) were oxidized in air at 300-500℃. The oxidation kinetics generally followed the parabolic law, and the oxidation rate constants increased with increasing temperature. It was found that the oxidation resistance of XCu3 is superior to that of Cu3. Based on XRD analyses, the scales formed on the XCu3 were composed of mostly CuO and Cu2O, while minor amounts of cubic-ZrO2 and ZrTiO4 were also detected for the Cu3. XRD peaks detected on the substrate of Cu3, indicating phase transformation was taken place after oxidation at 400℃.