【摘要】 利用动态机械分析法（DMA）研究了锆基非晶合金Zr_60.6Cu_18.6Ni_11.7Al_9.1和Zr_54.45Cu_29.7Al_9.9Ni_4.95Y₁的弹性性能随温度的变化以及与结构弛豫有关的弹性异常和能量衰减。通过差示扫描量热法（DSC）确定了玻璃转变温度T_g分别为689K和654K,晶化温度T_x分别为733K和724K。X射线衍射（XRD）分析表明结构均为非晶结构。DMA结果表明,储能模量在T_g附近出现拐点或谷。损耗模量和损耗因子在T_g附近出现峰值,且随着频率的升高,峰值幅度减小,峰值温度基本不变。β弛豫表现为额外的翼。更多还原

【Abstract】 The temperature dependence of elastic properties,elastic anomalies and energy loss associated with structure relaxation of Zr-based bulk metallic glasses（BMGs）Zr_60.6Cu_18.6Ni_11.7Al_9.1and Zr_54.45Cu_29.7Al_9.9Ni_4.95Y₁ was investigated using dynamic mechanical analysis（DMA）.The glass transition temperature T_gand the crystallization temperature T_xwere determined to be 689K,654K,733Kand 724Kby differential scanning calorimetry（DSC）.X-ray diffraction（XRD）analysis indicates that both the structures exhibit amorphous.DMA results indicate that kinks or valleys in the storage moduli occur near T_g.Peaks of the loss moduli and the loss factor occur near T_g.With the increase of the frequency,the peak amplitudes are decreased,and the peak temperature basically remains the constant value.βrelaxation is indicated by the excess wings.更多还原