Cu47Ti34Zr11Ni8块体非晶合金的热稳定性和力学性能

来源期刊：中国有色金属学报2004年第9期

论文作者：孔见 陈光 王志华 孙强金

文章页码：1585 - 1585

关键词：块体非晶合金； 玻璃形成能力； 力学性能

Key words：bulk amorphous alloy; glass-forming ability(GFA); mechanical properties

摘    要：采用差压铸造法成功制备了Cu47Ti34Zr11Ni8块体非晶合金， 研究了其热稳定性和力学性能。 结果表明： 该块体非晶合金的玻璃转变温度T_g=672 K， 晶化温度T_x1=735 K， 过冷液相区ΔT_x=63 K, 约化玻璃温度T_rg=0.575， 弯曲断裂强度高达2 350 MPa， 断裂前弹性变形量为2.1%， 弯曲模量为102 GPa； 淬态微米级结晶相的出现使合金的三点弯曲断裂强度下降至1 100 MPa。

Abstract: Cu47Ti34Zr11Ni8 bulk amorphous alloy was prepared by differential pressure casting. Thermal stability and mechanical properties were studied. The results show that the glass transition temperature(T_g), crystallization temperature(T_x1), temperature interval of supercooled liquid region ΔT_x(=T_x1-T_g) and reduced glass transition temperature(T_rg) are proved to be 672 K, 735 K, 63 K, and 0.575, respectively. The bulk glass also exhibits high three point-bending flexural strength of 2 350 MPa, flexural modulus of 102 GPa and fracture strain of 2.1%. The three point-bending flexural strength of the alloys declines to 1 100 MPa with the appearance of a micron-size quenched-in crystallization.