脱合金反应制备原位富Ta相增强Zr-Cu基复合材料

利用金属熔体中的脱合金反应制备了原位自生富Ta相增强Zr-Cu非晶基复合材料,研究了传统电弧熔炼法和新型脱合金法制备复合材料的第二相差异,并比较了不同脱合金反应温度对第二相的影响。与传统电弧熔炼方法相比,脱合金化法制备的复合材料第二相尺寸更细小,数密度更高,单位界面面积更大,更有利于材料强度和塑性的提高。同时,随着脱合金反应温度提高,第二相的尺寸和体积分数逐渐降低,非晶基体和第二相的硬度随之提高。

Preparation of In-situ Ta-rich Phase Reinforced Zr-Cu Amorphous Matrix Composites Based by Dealloying Method

In-situ formation of Ta-rich reinforced Zr-Cu amorphous matrix composites was performed by dealloying method.The difference of the second phase in composites prepared by the conventional arc-melting method and novel dealloying method was analyzed comparatively,and effects of dealloying on the second phase at different temperatures were expounded comparatively.Compared with that in the composites prepared by the conventional arc-melting method,the second phase in the composites prepared by the dealloying method presents finer in size,higher number density and larger in unit interface area,which is beneficial to the improvement of strength and plasticity.Meanwhile,as the dealloying reaction temperature increases,the size and volume content of the second phase are decreased,and hardness of the amorphous matrix and the second phase are increased.