Preparation and Mechanical Properties of Misch Metal Based Bulk Metallic Glasses  

作　　者：武晓峰 邱克强 孟力凯 赵威 索忠源 

机构地区：[1]Faculty of Materials and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China [2]Faculty

出　　处：《Journal of Rare Earths》2005年第6期727-731,共5页稀土学报（英文版）

基　　金：ProjectsupportedbyNaturalScienceFoundationofLiaoningProvince(20032137)

摘　　要：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 Δ 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 Tl are closely correlated with the glass forming ability （GFA） of Mm-based alloys.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 Δ 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 Tl are closely correlated with the glass forming ability （GFA） of Mm-based alloys.

关 键 词：bulk metallic glasses misch metal thermal analysis mechanical properties rare earths 

分 类 号：TG139.8[一般工业技术—材料科学与工程]