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采用差示扫描量热仪以连续加热的方式研究了Zr50Ti5Cu18Ni17Al10块体金属玻璃的热稳定性。其玻璃转变激活能(Eg)以及晶化激活能(Ep1和Ep2)分别为438±11,284±8和323±11kJ/mol。采用压缩试验研究了金属玻璃的室温力学性能,初始应变速率为1×10-4s-1。直径为3mm的金属玻璃棒呈现良好的力学性能,最大塑性应变达3%,杨氏模量和断裂强度的最大值分别为90GPa和1968MPa。多条剪切带的交织、分叉和滑移以及宽度为60?m的较大临界剪切台阶是Zr50Ti5Cu18Ni17Al10块体金属玻璃具有较高压缩塑性的主要原因。
The thermal stability of Zr50Ti5Cu18Ni17Al10 bulk metallic glass was investigated by differential scanning calorimetry (DSC). The glass transition activation energy (Eg) and the crystallization activation energy (Ep1 and Ep2) were 438 ± 11,284 ± 8 and 323 ± 11kJ / mol, respectively. The compressive test was used to study the room-temperature mechanical properties of metallic glass. The initial strain rate was 1 × 10-4s-1. Glass rods with a diameter of 3 mm exhibited good mechanical properties with a maximum plastic strain of 3% and a maximum Young’s modulus and breaking strength of 90 GPa and 1968 MPa, respectively. The interlacing, bifurcation and slippage of multiple shear bands and the large critical shear step with a width of 60 μm are the main reasons for the high compressive plasticity of Zr50Ti5Cu18Ni17Al10 bulk metallic glass.