具有大过冷液相温度区间的Cu基大块非晶合金的制备和机械性能

材料导报, 2007, 21(z2): 196-198.

具有大过冷液相温度区间的Cu基大块非晶合金的制备和机械性能

曹鹏军 ^1, , 仵海东 ^2, , 范培耕 ^3, , 周安若 ^4,

1.重庆科技学院冶金与材料工程学院,重庆,400050

2.重庆科技学院冶金与材料工程学院,重庆,400050

3.重庆科技学院冶金与材料工程学院,重庆,400050

4.重庆科技学院冶金与材料工程学院,重庆,400050

基金项目: 重庆市自然科学基金(2005BB4163)

关键词： Cu基大块非晶合金 , 过冷液相温度区间 , 玻璃形成能力 , 机械性能 , 添加元素

Preparation and Mechanical Strength of Cu-based Bulk Glassy Alloys with Large Supercooled Liquid Region

Keywords： copper-based bulk glassy alloys , supercooled liquid region , glass-forming ability , mechanical properties , additional element

利用铜模铸造方法制备了具有大过冷液相温度区间的Cu-Zr-Ti-Ni系高强度Cu基大块非晶合金,对于Cu55Zr55Ti15Ni5合金,最大直径达5mm.过冷液相区温度范围ΔTx达45.48～70.98 K.Cu基玻璃合金棒表现出非常高的机械性能和明显的塑性,对于Cu50Zr25Ti15Ni10、Cu55Zr25Ti15Ni5和Cu54Zr22Ti18Ni6合金,压缩断裂强度分别达2155MPa、2026MPa和1904MPa,维氏硬度分别达674、678和685.加入Co元素扩大了CuZr-Ti-Ni系合金的ΔTx,Cu50Zr22Ti18Ni6Co4合金的ΔTx高达74.5K.

High-strength Cu-based bulk glassy alloys with a large supercooled liquid region in Cu-Zr-Ti-Nisystems are prepared by means of copper mold casting. The maximum diameter is 5.0 mm for the Cu55Zr25Ti15Ni5 alloy. The temperature interval of supercooled liquid region (ΔTx) is as large as 45.48～70.98 K. The Cu-based glassy alloys rods exhibited the very high mechanical properties and the distinct plastic strains, the compressive fracture strength is 2155 MPa for Cu50Zr25Ti15Ni10, 2026 MPa for Cu55Zr25Ti15Ni5 and 1904 MPa for Cu54Zr22Ti18Ni6. The vickers hardness is 678 for Cu55Zr25Ti15Ni5 glassy alloy, 685 for Cu54Zr22Ti18Ni6 glassy alloy and 674 for Cu50Zr25Ti15Ni10 glassy alloy. The addition Co element to Cu-Zr-Ti-Ni alloy expand the ΔTx, when Co content is 4 at%, the ΔTx is 74.5 K for Cu50Zr22Ti18Ni6Co4 alloy.

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