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首页> 外文期刊>Materials transactions >Preparation of Bulk Glassy Pd_(40)Ni_(10)Cu_(30)P_(20) Alloy of 40 mm in Diameter by Water Quenching
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Preparation of Bulk Glassy Pd_(40)Ni_(10)Cu_(30)P_(20) Alloy of 40 mm in Diameter by Water Quenching

机译：水淬法制备直径40mm的块状玻璃态Pd_（40）Ni_（10）Cu_（30）P_（20）合金

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摘要

Cylindrical glassy alloys with diameters up to 40 mm were prepared for a Pd_(40)Ni_(10)Cu_(30)P_(20) alloy with a high reduced glass transition temperature (T_g/T_m) of 0.71 by water quenching the molten alloy in the quartz tube. The bulk glassy alloy with a diameter of 40 mm exhibits good metallic luster on the outer surface. Neither cavities nor voids are seen over the whole inner region and no contrast revealing a crystalline phase is seen over the transverse cross section. The glass transition temperature (T_g), crystallization temperature (T_x), the temperature interval of the supercooled liquid region (#DELTA#T_x= T_x- T_g) and the melting temperature (T_m) are measured to be 575, 95 and 804K, respectively, for the Pd_(40)Ni_(10)Cu_(30)P_(20) alloy with a diameter of 40 mm. The deviation of Cu content from 30 at percent Cu in the Pd_(40)Ni_(40-x)Cu_xP_(20) system causes a steep increase in Tm and a decrease in T_g/T_m, leading to the decrease in the glass-forming ability. The successes of finding the new Pd-Cu base alloy composition with the large #DELTA#T_x and T_g/T_m values and preparing the bulk glassy alloy with a diameter of 40 mm are encouraging for the future development of glassy alloys.
机译：通过水淬使熔融合金淬火，制备出Pd_（40）Ni_（10）Cu_（30）P_（20）合金，其最大玻璃化转变温度（T_g / T_m）降低至0.71，制备直径最大为40 mm的圆柱形玻璃合金在石英管中。直径为40毫米的块状玻璃合金在其外表面上具有良好的金属光泽。在整个内部区域都没有看到孔洞或空隙，并且在横截面上没有看到显示出结晶相的对比度。玻璃化转变温度（T_g），结晶温度（T_x），过冷液体区域的温度间隔（＃DELTA＃T_x = T_x-T_g）和熔融温度（T_m）分别测量为575、95和804K。 ，用于直径为40 mm的Pd_（40）Ni_（10）Cu_（30）P_（20）合金。在Pd_（40）Ni_（40-x）Cu_xP_（20）系统中，Cu含量偏离30at％的Cu会导致Tm急剧增加而T_g / T_m减少，从而导致玻璃形成的减少能力。找到具有大＃DELTA＃T_x和T_g / T_m值的新型Pd-Cu基合金成分以及制备直径为40 mm的块状玻璃态合金的成功，对于玻璃态合金的未来发展是令人鼓舞的。

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