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題名 | 微量Sc對Zr-Cu-Al-Ni合金顯微結構及機械性質之影響=Effects of Minor Scandium on the Microstructures and Mechanical Properties of Zr-Cu-Al-Ni Amorphous Alloys |
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作者 | 陳適範; 林新亮; 戴鵬桓; 陳貞光; 林於隆; 薄慧雲; | 書刊名 | 鑄造工程學刊 |
卷期 | 37:1=148 2011.03[民100.03] |
頁次 | 頁27-35 |
分類號 | 440.35 |
關鍵詞 | 金屬玻璃; 機械性質; 破斷面形貌; Metallic glass; Mechanical properties; Fractography; |
語文 | 中文(Chinese) |
中文摘要 | 本研究將(Zr50Cu35Ni6Al9)(下標 100-X)Sc(下標 X)(X=0, 0.02, 0.05, 0.1, 0.5,及1 at.%)以熔射鑄造法製備成直徑3mm的棒材,在X=0.02與1 at.%時,其XRD繞射光譜為一寬廣繞射峰,且SEM圖中未觀測到結晶相,顯示其為非晶質結構。X=0,0.05,0.1及0.5 at.%時,XRD繞射圖樣除了寬廣的繞射峰外,還增加許多特徵繞射峰意味著非晶質基地中微小結晶組織的存在。其中,含Sc 1 at.%的棒材其△Tx為105K,高於先前學者發表之Zr基材料研究,顯示此合金棒材具有良好的玻璃形成能力。由X=0.02與1 at.%非晶棒材的微硬度試驗中,可測得其硬度分別為575及580 Hv,優於其他成分之棒材;單軸壓縮試驗方面,X=0.02與1 at.%的非晶合金棒材其壓縮強度分別為1750MPa及1800MPa,為合金系統中最高之壓縮強度,以上顯示非晶結構之合金棒材具有優異的硬度與壓縮強度。破斷面分析方面,所有棒材皆可觀察到非晶特有之脈絡狀破斷面形貌,經進一步倍率放大後,可觀察到屬脆性破裂的河川紋特徵。 |
英文摘要 | The 3mm diameter alloy rods of (Zr50Cu35Ni6Al9)(subscript 100-X)Sc(subscript X) (X=0, 0.02, 0.05, 0.1, 0.5 and 1at.%) were produced by injection casting method. In the rods where Sc addition were 0.02 and 1 at.%, their XRD spectra consisted of only broad diffraction peaks without any sharp Bragg peaks, indicating they are amorphous in structure. For the rods of X=0, 0.05, 0.1 and 0.5 at.%, their XRD spectra showed characteristic Bragg peaks on top of the broad diffraction peaks meaning that they were glassy matrix composites. The 1at.% Sc containing rod had △Tx as high as 105 K showing its excellent glass forming ability. Among all alloys investigated, the alloy rods of X=0.02 and 1at.% gave rise to the highest microhardness of 575 and 580 Hv respectively. Their uniaxial compressive strengths were also the highest and reached 1750MPa and 1800MPa respectively. The vein-like fracture characteristics were found to dominate the fracture surfaces of all uniaxial compressive test specimens. However, in the regions nearby these vein-like fractures, typical brittle river patterns were also observed. |
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