Pressure Dependence of Elastic Constants and Debye Temperature for Zr_50.5Ti_4.8Cu_19.0Ni_11.4Al_14.3 Bulk Metallic Glass
Pressure Dependence of Elastic Constants and Debye Temperature for Zr_50.5Ti_4.8Cu_19.0Ni_11.4Al_14.3 Bulk Metallic Glass
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DOI：
10.1557/jmr.2002.0264
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发表时间：
2002-07
影响因子：
2.7
通讯作者：
P. Wen;Ru Ju Wang;Wei Hua Wang
中科院分区：
文献类型：
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作者：
P. Wen;Ru Ju Wang;Wei Hua Wang
用高分辨电子显微镜研究了Zr50.5Ti4.8Cu19.0Ni11.4Al14.3大块非晶合金的微观结构。BMG的显微组织成分均匀，具有短程有序结构。利用超声技术和脉冲回波重叠法，测量了BMG的声速随压力的变化，最高可达0.5 Gpa。得到了弹性常数及其与压力的关系。用Murnaghan形式确定了BMG的等温状态方程。根据弹性常数和金属组分弹性常数的结果，讨论了BMG的原子构型。
The microstructure of Zr_50.5Ti_4.8Cu_19.0Ni_11.4Al_14.3 bulk metallic glass (BMG) was investigated by high-resolution electron microscopy. The microstructure of the BMG is of homogeneous composition and short-range ordered microstructure. Using an ultrasonic technique with the pulse echo overlap method, the pressure-dependent acoustic velocities of the BMG have been measured up to 0.5 GPa. The elastic constants and their pressure dependence have been obtained. The isothermal equation of state (EOS) of the BMG is determined in terms of the Murnaghan form. With the results of the elastic constants and the EOS for those of its metallic components, the atomic configuration of the BMG is discussed.