標題: | 氧化鋯內添加不同比例氧化鈣與鈦金屬高溫擴散 Interfacial Phenomenon between Titanium and Calcia Stabilized Zirconia |
作者: | 曾淵愈 Tseng, Yuan-Yu 林健正 Lin, Chien-Cheng 材料科學與工程學系 |
關鍵字: | 氧化鋯;氧化鈣;鈦;zirconia;calcia;titanium |
公開日期: | 2008 |
摘要: | 以熱壓法製備不同組成之CaO/ZrO2(Calcia/Zirconia)陶瓷試片,與鈦(Titanium, Ti)在1atm 氬(Ar)氣氛下,進行1550℃/6 hr之擴散反應,探討CaO含量對CaO/ZrO2系陶瓷材料與鈦金屬高溫擴散介面反應之影響。本實驗利用X光繞射(x-ray diffraction, XRD)、掃描式電子顯微鏡(Scanning Electron Microscopy/Energy Dispersive Spectroscopy, SEM/EDS),分析擴散反應後介面之微觀結構。實驗結果顯示,在5mole% CaO/ZrO2與鈦高溫擴散反應後,介面擴散反應受到抑制,鈦側發現僅有一層反應層,厚度約2μm之TiO反應層,而在氧化鋯側發現有大量的α-Zr與t-ZrO2-x的產生,可知反應層TiO的產生像一層擴散阻擋(barrier)層,使Ti、Zr的擴散明顯受到抑制。
CaO/ZrO2陶瓷試片9mole%與17mole%,分別與鈦高溫擴散反應後,發現Ti與Zr之間有相當劇烈的擴散反應,而Zr、O大量固溶於Ti中,在鈦側發現有三層反應層,依序為α-Ti+Ti2ZrO、β΄-Ti+α-Ti+Ti2ZrO及β΄-Ti+acicular α-Ti,而在氧化鋯側接近介面處則發現有β΄-Ti與CaZrO3共存,而在遠離介面處之陶瓷側影響區則有大量α-Zr與c-ZrO2-x的產生。但在17mole% CaO/ZrO2中,在遠離介面之陶瓷影響區,除了有α-Zr與c-ZrO2-x的產生,有少量CaZrO3會存在於晶界上。在陶瓷側α-Zr析出量隨CaO含量增加而有明顯減少。 Various CaO/ZrO2 hot press sample was reacted with titanium at 1550℃/6 hr. in argon Investigate the ratio of the CaO/ZrO2 can be effective to control the interfacial reaction. The microstructure of the reaction interface was characterized using x-ray diffraction(XRD) and analytical electron microscopy(SEM/EDS). A few reactions take place at interface between Ti and 5mole% CaO/ZrO2. Interfacial reactions were effectively suppressed by incorporating less than 5mole% CaO. TiO reaction layer effectively obstruct Ti and Zr diffuse mutually. TiO layer function was like a reaction barrier phase and found in the Ti side. 9mole% and 17mole% CaO/ZrO2 react with Ti at 1550℃ 6 hr gave rise to strong reaction. A large amount of Zr and O was dissolved into Ti . Product three reactive layers of α-Ti+Ti2ZrO、β΄-Ti+α-Ti+Ti2ZrO及β΄-Ti+acicular α-Ti in the Ti side. And on the zirconia side near the original interface were found β΄-Ti and CaZrO3 coexist, result in Ti and Ca cannot mutual solubility. In region of far away the original interface, α-Zr, c-ZrO2-x, and/or residual CaZrO3 were found in the ceramic side. More than 17mole% CaO/ZrO2 the amount of α-Zr decreased with increasing CaO. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079618527 http://hdl.handle.net/11536/42325 |
顯示於類別: | 畢業論文 |