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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/13585

Title: 塊狀金屬玻璃非晶質相之接合研究
The Study of Amorphous State Joining for Bulk Metallic Glasses
Authors: Pei-Hung Kuo
Contributors: NTOU:Institute of Materials Engineering
Keywords: 非晶質;塊狀金屬玻璃;電弧銲接;擴散接合
amoephous;bulk metallic glass;arc welding;diffusion bonding
Date: 2006
Issue Date: 2011-06-30T07:23:28Z
Abstract: 本論文分兩個階段,首先使用脈衝式惰性氣體鎢極電弧銲接鋯基塊狀金屬玻璃Zr55Cu30Ni5Al10,分別採用不同的兩種降溫速率(空冷及液態氮強制冷卻)來討論非晶質相銲接的可能性,並添加微量鈧金屬,進一步探討金屬玻璃成形能力對於銲接的影響,並成功的銲接含微量鈧的塊狀金屬玻璃且沒有產生結晶(配合液態氮強制冷卻)。第二階段,利用塊狀金屬玻璃的過冷液態區,當溫度介於玻璃轉化溫度及再結晶溫度之間,塊狀金屬玻璃黏度會隨著溫度上升而下降。藉此,本研究使用擴散銲接的製程於三種不同非晶材料Cu60Zr30Ti10 (S1),Zr47.5Cu47.5Al5 (S2)和 Zr52.5Cu17.9Ni14.6Al10Ti5 (S3),並探討同質與異質結合的可能性且維持於非晶質相狀態的製程。
Abstract The pulsed direct current autogeneous inert gas tungsten arc welding was conducted on the rod of bulk metallic glasses (BMGs) Zr55Cu30Ni5Al10 and (Zr55Cu30Ni5Al10)99.98Sc0.02 with two different cooling conditions. In spite of the cooling rate, the crystalline precipitates in the fusion zone of BMG Zr55Cu30Ni5Al10 has been confirmed by the micro-focused x-ray diffraction pattern as Zr2Ni and Zr2(Cu,Al) intermetallic compounds. In contrast, BMG with Sc addition (Zr55Cu30Ni5Al10)99.98Sc0.02 shows an excellent stable glass forming ability. The fusion zone of BMG (Zr55Cu30Ni5Al10)99.98Sc0.02 remains in the same amorphous state as of the amorphous base metal when the weld is cooled with accelerated cooling. Similar and dissimilar bonding was performed on three different BMGs, Cu60Zr30Ti10 (S1), Zr47.5Cu47.5Al5 (S2), and Zr52.5Cu17.9Ni14.6Al10Ti5 (S3). The crystallization of Zr2Cu and Zr2Al compound formation is detrimental to the joining. The viscosity of surface Newtonian flow has been calculated and affirms the viscous flow as the mechanism of solid state joining process. Keywords: bulk metallic glass, arc welding, diffusion bonding
URI: http://ethesys.lib.ntou.edu.tw/cdrfb3/record/#G0M94550022
Appears in Collections:[材料工程研究所] 博碩士論文

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