Preparation and Mechanical Properties of Misch Metal Based Bulk Metallic Glasses
来源期刊：JOURNAL OF RARE EARTHS2005年第6期
论文作者：Suo Zhongyuan Meng Likai Qiu Keqiang Wu Xiaofeng Zhao Wei
Key words：bulk metallic glasses; misch metal; thermal analysis; mechanical properties; rare earths;
Abstract: The formation, thermal stability and mechanical properties of Misch metal (Mm)-based alloy bulk metallic glasses (BMGs) with composition of Mm55Al25Cu10Ni5Co5 were investigated by means of X-ray diffraction, differential scanning calorimetry, differential thermal analysis and compression test. The results indicate that the Mm-based BMGs exhibit a distinct glass transition and a wide supercooled liquid region △Tx( ＞ 60 K) before crystallization. The alloy can be fabricated into bulk glassy form of 3 mm in diameter by copper mold casting methods. Compared with the La55Al25Cu10 Ni5Co5 BMG, the Mm55Al25Cu10Ni5Co5 BMG shows higher compression fracture strength and lower cost. A new parameter γ and melting temperature T1 are closely correlated with the glass forming ability (GFA) of Mm-based alloys.
Suo Zhongyuan1，Meng Likai1，Qiu Keqiang1，Wu Xiaofeng1，Zhao Wei1
(1.Faculty of Materials and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China)
Abstract:The formation, thermal stability and mechanical properties of Misch metal (Mm)-based alloy bulk metallic glasses (BMGs) with composition of Mm55Al25Cu10Ni5Co5 were investigated by means of X-ray diffraction, differential scanning calorimetry, differential thermal analysis and compression test. The results indicate that the Mm-based BMGs exhibit a distinct glass transition and a wide supercooled liquid region △Tx( ＞ 60 K) before crystallization. The alloy can be fabricated into bulk glassy form of 3 mm in diameter by copper mold casting methods. Compared with the La55Al25Cu10 Ni5Co5 BMG, the Mm55Al25Cu10Ni5Co5 BMG shows higher compression fracture strength and lower cost. A new parameter γ and melting temperature T1 are closely correlated with the glass forming ability (GFA) of Mm-based alloys.
Key words:bulk metallic glasses; misch metal; thermal analysis; mechanical properties; rare earths;
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