Development of the New Process for Preparing Bulk Metallic Glass

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簡歷

基本資料

Project title

Code/計畫編號

NSC98-2622-E019-010-CC3

Translated Name/計畫中文名

塊狀金屬玻璃之新製程開發研究

Project Coordinator/計畫主持人

Pee-Yew Lee

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Optoelectronics and Materials Technology

Website

https://www.grb.gov.tw/search/planDetail?id=1934448

Year

2009

Start date/計畫起

01-11-2009

Expected Completion/計畫迄

31-10-2010

Bugetid/研究經費

441千元

ResearchField/研究領域

材料科技

塊狀金屬玻璃材料其原子結構類似液體狀態呈現無序的排列，因此擁有良好的導磁率、電阻、硬度和抗拉強度以以及抗γ輻射損傷與腐蝕等許多獨特的特性，上述特性之組合使得塊狀金屬玻璃在各種技術應用上皆具有其吸引力，此例如結合高硬度、高強度及高抗蝕特質使此等材料可用於高爾夫球頭、手機外殼、感測器塗層、醫學植入組件、微型精密齒輪及乾式軸承等產品之製造，然為能有效提升塊狀金屬玻璃之生產速率以因應潛在之商業利益，實有必要開發展出具時效性之小型量產級製程；故本計劃之目的是針對現有的真空落鑄式熔煉設備，將其改良成兼具落鑄/吸鑄式功效的熔鑄設備，藉此開發一可製造出具不同形狀及尺寸的新型塊狀金屬玻璃製程，修改方案是針對包含電極與銅模的爐壁水冷系統、坩堝幾何形狀進行改良以提高銅模冷卻功能，除此外亦將真空系統設計成由一主幫浦及二輔助幫浦組成，藉此提升真空度以避免熔液冷卻時產生驟熱現象降低冷卻速率，在材料選用檢測方面則依據合成塊狀金屬玻璃的三必要條件選取四元銅鋯鋁銀合金，利用改良之落鑄/吸鑄式熔鑄設備進行塊狀銅鋯鋁銀金屬玻璃的製備，所合成之銅基塊狀金屬玻璃，均將進行XRD、DSC、SEM、TEM/HRTEM、硬度等檢測以瞭解其相關特性，詳細評估所得之數據資料後，將可獲知以落鑄/吸鑄式熔鑄設備製備銅鋯鋁銀金屬玻璃塊材的最佳化條件，因此期望經由本計劃之進行，即早建立國內業界製備塊狀金屬玻璃的自製能量。Owing to their disordered or amorphous structure, bulk metallic glasses (BMG) possess some unique characteristics like high magnetic permeability, electrical resistivity, hardness and tensile strength, resistance to gamma radiation damage and corrosion. A combination of these properties in BMG makes them attractive for various technological applications. For example, their high hardness coupled with high strength and corrosion resistance indicates their potential in many industrial applications such as golf head, cell phone case, sensor coating, biomedical parts, microgear and dry bearing. In order to effectively increase the production rate of BMGs for potentially commercial benefitin, it is critical to develop the capability to process them on the pilot scale, in a timely and efficient manner. Therefore, in the present study, the feasibility for development of a drop/suction machine with the capability to manufacture bulk metallic glass (BMG) castings with a wide range of geometries and dimensions is explored. The design methodology is modified an existing arc melter by (a) redefine geometrical constraints; (b) design of copper tooling to satisfy geometrical, mechanical, and electrical constraints; and (c) redesign of the vacuum system. The focus of this design was to improve the capabilities and simplicity of existing laboratory-scale metallic-glass casting machines, as well as to combine two major casting processes currently being utilized for the fabrication of bulk-metallic glasses. Processing experiments on the glass-forming alloy Cu-Zr-Al-Ag alloys will be processed. The characterization of the as-cast ingot will be performed by X-ray, DSC, SEM, TEM and hardness measurement. It is expected that the capability for preparing BMG by this new machine can be fully understand after comprehensive evaluation of all the experimental results obtained in this work.

Keyword(s)

塊狀金屬玻璃
落鑄/吸鑄
銅基
冷卻

DSpace CRIS

Development of the New Process for Preparing Bulk Metallic Glass

基本資料

Description