Thermal and Mechanical Properties of Cu-Based Cu-Zr-Ti-Y Bulk Glassy Alloys.
Thermal and Mechanical Properties of Cu-Based Cu-Zr-Ti-Y Bulk Glassy Alloys.
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DOI：
10.2320/matertrans.42.1149
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发表时间：
2001-06
影响因子：
1.2
通讯作者：
Tao Zhang;K. Kurosaka;A. Inoue
中科院分区：
文献类型：
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作者：
Tao Zhang;K. Kurosaka;A. Inoue
以（Cu 0.6 Zr 0.3 Ti 0.1） 98 y2合金为基体，采用铜模铸造方法制备了抗拉断裂强度在2000 MPa以上的Cu基块状非晶合金。Cu 60 Zr 30 Ti 10形成玻璃的最大样品厚度为4 mm，含2% y的合金则增加到5 mm。2%Y的加入也使过冷液区（ΔT x = T x - T g）从36 K增加到50 K，玻璃化转变温度（T g /T l）从0.62增加到0.63。玻璃形成能力（GFA）的增加可能是由于ΔT x和Tg/T的增加。整体玻璃态（Cu 0.6 Zr 0.3 Ti 0.1） 98 y2合金的屈服强度为1780 MPa，抗拉断裂强度为2030 MPa，抗压断裂强度为2100 MPa，弹性伸长率为1.7%，塑性伸长率为1.5%。明显的塑性伸长率表明cu基大块玻璃合金具有良好的延展性。新型cu基大块玻璃合金的成功合成具有高GFA和良好的力学性能，使我们期待作为一种新型工程材料的应用领域的扩展。
A new Cu-based bulk glassy alloy with high tensile fracture strength above 2000 MPa was formed in a (Cu 0.6 Zr 0.3 Ti 0.1 ) 98 Y 2 alloy by copper mold casting. The maximum sample thickness for glass formation is 4 mm for Cu 60 Zr 30 Ti 10 and increases to 5 mm for the 2%Y-containing alloy. The addition of 2%Y also causes an increase in the supercooled liquid region (ΔT x = T x - T g ) from 36 to 50 K and in the reduced glass transition temperature (T g /T l ) from 0.62 to 0.63. The increase in the glass-forming ability (GFA) is presumably due to the increase in ΔT x and Tg/T. The bulk glassy (Cu 0.6 Zr 0.3 Ti 0.1 ) 98 Y 2 alloy exhibits good mechanical properties, i.e., 1780 MPa for yield strength, 2030 MPa for tensile fracture strength, 2100 MPa for compressive fracture strength, 1.7% for elastic elongation and 1.5% for plastic elongation. The distinct plastic elongation indicates good ductile nature of the Cu-based bulk glassy alloy. The success of synthesizing the new Cu-based bulk glassy alloy with high GFA and good mechanical properties allows us to expect the extension of application fields as a new engineering material.