三元Mg-Cu-Dy块状非晶合金的制备与力学性能  

Preparation and Mechanical Property of Ternary Mg-Cu-Dy Bulk Metallic Glass

作　　者：孟力凯[1] 康阳[1] 武晓峰[1] 

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《热加工工艺》2010年第10期125-128,共4页Hot Working Technology

摘　　要：用铜模铸造法成功制备出直径为8 mm的Mg60Cu27Dy13镁基三元块状非晶合金。利用XRD和DSC等手段对Mg-Cu-Dy合金系的非晶形成能力进行了分析并对其力学性能进行了测定。结果表明,Mg87-xCuxDy13(x=17,22,27,32)合金具有明显的玻璃转变温度Tg、较宽的过冷液相区ΔTx=Tx-Tg及较高的约化玻璃转变温度Trg=Tg/Tl,其中以Mg60Cu27Dy13合金的非晶形成能力最强。该非晶合金的压缩断裂强度(σf)为640 MPa。参数γ与这类合金的非晶形成能力具有良好的对应关系。Mg60Cu27Dy13 bulk metallic glass（BMG） with φ8 mm was prepared by copper mould casting.The glass forming ability（GFA） and thermal stability of Mg-Cu-Dy alloys were investigated by differential scanning calorimetry（DSC） and X-ray diffraction（XRD）,and the mechanical properties were measured.The results show that Mg87-xCuxDy13（x=17,22,27,32） alloys in Mg-Cu-Dy alloy system exhibit distinct glass transition temperature Tg,large supercooled liquid region ΔTx and high reduced glass transition temperature Trg.Mg60Cu27Dy13 alloy has the largest GFA.And its compressive facture strength（σf） is 640 MPa.Parameter γ shows a relatively good agreement with the GFA of BGMs.

关 键 词：镁基块状非晶合金 Mg-Cu-Dy 非晶形成能力 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]