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Effect of Al Addition on the Mechanical Properties and Microstructure of Zr35Ti30Cu7.5Be27.5 Bulk Metallic Glass
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Effect of Al Addition on the Mechanical Properties and Microstructure of Zr35Ti30Cu7.5Be27.5 Bulk Metallic Glass
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National Natural Sciences Foundation of China (51171160, 51171163); National Basic Research Priorities Program of China (2010CB731600); Natural Sciences Foundation of Hebei (E2010001176)

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    摘要:

    利用單軸壓縮試驗研究了用部分Al替代Zr對Zr35-xTi30Cu7.5Be27.5Alx (x=0，1，1.5，2，2.5，5，at%) 塊體金屬玻璃力學(xué)性能的影響。研究表明，當(dāng)添加Al含量為1.5 at%和2 at%時，所得到的塊體金屬玻璃的壓縮塑性從0.95% (x=0) 分別提高至15.10% (x=1.5) 和3.45% (x=2)。利用掃描電子顯微鏡 (SEM) 對金屬玻璃樣品的斷裂形貌進行了表面分析。利用透射電子顯微鏡 (TEM) 對不同Al含量的塊體金屬玻璃試樣進行了微觀結(jié)構(gòu)表征，結(jié)果顯示，Al含量為1.5 at %和2 at %的金屬玻璃樣品的微觀結(jié)構(gòu)呈現(xiàn)出了納米級別的“微觀不均勻性”。最后，結(jié)合臨界剪切應(yīng)力 (CSS) 討論了微觀結(jié)構(gòu)與塑性變形行為之間的關(guān)聯(lián)性

    Abstract:

    The effect of partial substitution of Al for Zr on the mechanical properties of Zr35-xTi30Cu7.5Be27.5Alx (x=0, 1, 1.5, 2, 2.5, 5, at%) bulk metallic glasses were studied by uniaxial compression test. The results showed that the compressive plasticity can be greatly improved from 0.95% (x=0) to 15.10% (x=1.5) and 3.45% (x=2) in Zr35Ti30Cu7.5Be27.5 bulk metallic glass. The fracture morphologies of the Zr35-xTi30Cu7.5Be27.5Alx bulk metallic glasses were characterized by means of scanning electron microscope (SEM). Transmission electron microscope (TEM) was employed to investigate the microstructures of the bulk metallic glasses containing different amounts of Al. It is found that the enhanced compressive plasticity could be attributed to the nanoscale heterogeneity in the bulk metallic glasses. The effect of Al addition on the microstructure and deformation behavior of the Zr-based bulk metallic glasses was discussed in terms of different critical shear stress (CSS).

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宗海濤,馬明臻,李立新,景 勤,張寶慶,劉日平. Effect of Al Addition on the Mechanical Properties and Microstructure of Zr35Ti30Cu7.5Be27.5 Bulk Metallic Glass[J].稀有金屬材料與工程,2013,42(3):470~473.[Zong Haitao, Ma Mingzhen, Li Lixin, Jing Qin, Zhang Baoqing, Liu Riping. Effect of Al Addition on the Mechanical Properties and Microstructure of Zr35Ti30Cu7.5Be27.5 Bulk Metallic Glass[J]. Rare Metal Materials and Engineering,2013,42(3):470~473.]
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  • 收稿日期:2012-11-11
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