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首页> 外文会议>MRS Meeting >Self-diffusion in Zr{sub}55Al{sub}10Ni{sub}10Cu{sub}25 and Pd{sub}40Cu{sub}30Ni{sub}10P{sub}20 bulk metallic glass
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Self-diffusion in Zr{sub}55Al{sub}10Ni{sub}10Cu{sub}25 and Pd{sub}40Cu{sub}30Ni{sub}10P{sub}20 bulk metallic glass

机译：以Zr {子} 55Al {子} {10Ni系子} 10Cu {子} 25和Pd {子} 40Cu {子} 30Ni {子} 10P {子} 20块状金属玻璃自扩散

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摘要

Self-diffusion coefficients of Ni in Zr{sub}(55)AL{sub}(10)Ni{sub}(10)Cu{sub}(25) and of Ni and Pd in Pd{sub}40)Cu{sub}(3s0)Ni{sub}(10)P{sub}(20) bulk metallic glass below and above the glass transition temperature T{sub}g have been measured with an ion-beam sputter-sectioning technique using the radioactive isotope (63){sup left}Ni and (103){sup left}Pd. The diffusion coefficients in the supercooled liquid region are much higher than those extrapolated from low temperature data in the amorphous region. The temperature dependence of the diffusion coefficients exhibits non-Arrhenius behavior in the supercooled liquid phase. Such a deviation from the Arrhenius plots is interpreted by a cooperation of moving tracer atom with the surrounding atoms. The difference of the diffusion behavior in between Zr-Al-Ni-Cu and Pd-Cu-Ni-P glasses is attributed to the different structural stability of both glasses.
机译：Ni的自扩散系数在Zr {sub}（55）α（10）ni {sub}（10）Cu {sub}（25）和Pd {sub} 40中的Ni和Pd）Cu {sub }（3S0）Ni {Sub}（10）P {Sub}（20）玻璃化转变温度下方和上方的块状金属玻璃已经用离子束溅射切片技术使用放射性同位素（ 63）{sup left} ni和（103）{sup离开} pd。过冷液位区域中的扩散系数远高于非晶区域中的低温数据的那些。扩散系数的温度依赖性在过冷液相中表现出非Arrhenius行为。与arrhenius图的这种偏差是通过与周围原子的移动示踪原子的协作来解释。 Zr-Al-Ni-Cu和Pd-Cu-Ni-P玻璃之间的扩散行为的差异归因于两个眼镜的不同结构稳定性。

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