本篇研究使用具有快速冷卻效果的¬噴覆成型製程來製備Mg-Cu-Gd塊狀玻璃金屬。所噴覆出的Mg-Cu-Gd玻璃金屬直徑有300mm及最大厚度有10mm。利用X光繞射分析(XRD)及穿透式電子顯微鏡(TEM)來檢測所噴覆出的材料之結構，並確定為非晶質材料。熱差式掃描分析(DSC)檢測此材料之上下區的玻璃轉換溫度及結晶溫度，而等溫熱差式掃描分析用來決定此材料在不同持溫溫度的潛伏時間，並計算其結晶活化能。此塊狀玻璃金屬的玻璃形成能力由Trg及γ等參數來做比較。掃描式(SEM)顯微鏡以及電子微探儀(EPMA)觀察其微結構及化學組成，其組成為Mg68Cu22.6Gd9.4。在不同位置的微硬度由維氏硬度試驗檢測。壓縮方面，進行三種不同的應變速率(5×10-2、5×10-3、5×10-4)下，得到所噴覆出的塊狀玻璃金屬之壓縮應力應變曲線。兩種型態的表面粗糙度也在壓縮實驗時比較其表面影響。為探討其加工成型，有在過冷液體的溫度範圍下(Tg<T<Tx) 進行壓縮試驗，並計算出此材料之Strain rate sensitivity，高溫壓縮後的試片亦進行TEM的檢測，觀察其奈米結晶的情況。最後進行擠型比例9以及36的背向式擠型，將擠型數據與熱壓數據進行比較分析。

The Mg-Cu-Gd bulk metallic glass (BMG) was synthesized by the spray forming process, a rapid solidification process. The spray-formed Mg-Cu-Gd BMG has a diameter of 300 mm and a maximum thickness of 10mm.The degree of crystallization and structure was determined by X-Ray Diffraction analyses and TEM, which shows amorphous structure. Differential Scanning Calorimeter analyses were performed to establish the glass transition and crystallization temperatures of the spray-formed Mg-Cu-Gd BMGs at top, and bottom positions. Isothermal DSC was also performed to determine the incubation times at various temperatures and its activation energy. The GFA (Glass Forming Ability) was determined with various glass forming criteria such as Trg and γ. Microstructures and chemical compositions were characterized and analyzed by SEM and EPMA, which has composition of Mg68Cu22.6Gd9.4 MHV hardnesses at different locations were measured by micro-Vickers hardness tester. The compressive stress vs. strain relationships of the spray-formed BMGs were obtained by compressive testing at various strain rates, 5×10-2, 5×10-3 and 5×10-4. Two types of the specimen surface roughness were prepared for the compressive tests. The effects of the strain rate and the specimen surface roughness on the compressive properties were studied. To know the workability, the compression test at temperature between glass transforming and crystallization was studied. TEM was used to confirm the structure and the nanocrystal. Final, there was a backward extrusion test by ratio of 9 and 36. The data was compare with hot compression test.

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