Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/9814
標題: 以氧化硼為中間層之氧化鋁陶瓷暫態液相擴散接合
Investigation on the Transient Liquid Phase Bonding of Al2O3 Ceramic by B2O3 Interlayer
作者: 黃健峰
Huang, Chien-Feng
關鍵字: Alumina;氧化鋁;Transient Liquid Phase Bonding;boron oxide;暫態液相接合;氧化硼
出版社: 材料工程學研究所
摘要: 
精密陶瓷擁有高熔點、耐磨耗等之特性,使其被廣泛的應用在工業上。然而在製造較大尺寸或較複雜之構件時,無法一體成型,而必須將不同零組件加以接合而為成品,此時便需借助於陶瓷接合技術。
本研究將氧化鋁表面各蒸鍍上一層厚度約3μm的氧化硼層,在空氣中,不同溫度、時間及壓力之下進行接合,對接合後之界面進行微結構觀察、電子探針微區成分分析、四點彎曲強度測試及X-ray相組成鑑定。
結果顯示,接合中間層的厚度隨著加熱溫度與時間的增加而減少,在接合條件為800℃、6小時及1500Pa下的橫截面觀察中看出接合界面最為緻密;在接合時間為6小時下,溫度達700℃以上始有化合物產生。接合強度在溫度800°C、時間15小時及荷重1500Pa之條件下為最大,其平均強度為71MPa。界面化合物之產生則隨著溫度上升,先形成3Al2O3-B2O3相,再形成2Al2O3-B2O3穩定相,接著兩相漸漸消失形成9Al2O3-2B2O3。而在破斷面SEM中可發現,Al2O3與B2O3之化合物在界面以針狀形成。

Alumina bulks coated with a 3m thick layer of boron oxide were bonded at various temperatures, times and loading in air. The properties of the bonding interface were investigated microstructurally by scanning electron microscopy (SEM), chemically by means of electron probe microanalysis, and mechanically by four point bending test. After, that the fracture surfaces were observed microstructures by SEM, and phases are determined by low angle X-ray diffraction.
It was found that the thickness of bonding interlayer decreases with increasing bonding temperature and time. The best compactability of bonding interlayer cross-section microstructure was reached at the bonding condition of 800℃, 6 hours and 1500Pa. The average bonding strength reaches the maximum value of 71MPa in this study at the bonding condition of 800℃, 15 hours and 1500Pa. Ceramic compounds form at the interface via bonding at temperature above 700℃. The phase analysis showed that the formation of compounds begin with the formation of 3Al2O3-B2O3 metastable phase. The compound transforms into 2Al2O3-B2O3 and 9Al2O3-2B2O3 stable phases with increasing temperature. Then they become 9Al2O3-2B2O3 stable phases. It was also found that needle-like structure of ceramic compounds form at the interlayer.
URI: http://hdl.handle.net/11455/9814
Appears in Collections:材料科學與工程學系

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