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首页> 外文期刊>Materials transactions >Formation of Metallic Glasses in Novel (Ti_(33)Zr_(33)Hf_(33))_(100-x-y)(Ni_(50)Cu_(50))_xAl_y Alloys
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Formation of Metallic Glasses in Novel (Ti_(33)Zr_(33)Hf_(33))_(100-x-y)(Ni_(50)Cu_(50))_xAl_y Alloys

机译：新型（Ti_（33）Zr_（33）Hf_（33））_（100-x-y）（Ni_（50）Cu_（50））_ xAl_y合金的金属玻璃形成

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摘要

The formation of metallic glasses by rapid solidification has been studied using an equiatomic substitution technique. This paper reports results on a series of (Ti_(33)Zr_(33)Hf_(33))_(100-x-y)(Ni_(50)Cu_(50))_xAl_y glassy alloys with compositions in the range x = 10-70 at percent and y = 10-30 at percent, and with a large supercooled liquid region in the range DELTA T = T_x- T_g = 40 to 124K where T_x = crystallization onset temperature and T_g = glass transition temperature. The crystallization of the glassy alloys was studied by a combination of X-ray diffraction and differential scanning calorimetry. For (Ni_(50)Cu_(50))-rich alloys with x = 50-70 at percent, crystallization took place with a single exothermic reaction, and for (Ti_(33)Zr_(33)Hf_(33))-rich alloys with x = 20=10 at percent, crystallization took place with a series of exothermic reactions. Increasing the Al content from y = 10 to 30 at percent decreased the glass forming ability of the amorphous phase for a wide range of transition metal compositions x = 40-70 at percent. The most stable amorphous alloy was (Ti_(33)Zr_(33)Hf_(33))_(40)(Ni_(50)Cu_(50))_(50)Al_(10) with a crystallization temperature of T_x = 818 K. However the amorphous alloy with the largest supercooled liquid region was (Ti_(33)Zr_(33)Hf_(33))_(60)(Ni_(50)Cu_(50))_(20)Al_(20) with a crystallization-glass transition temperature difference of T_x-T_g = 124K.
机译：已经使用等原子取代技术研究了通过快速凝固形成金属玻璃的过程。本文报告了一系列（Ti_（33）Zr_（33）Hf_（33））_（100-xy）（Ni_（50）Cu_（50））_ xAl_y玻璃态合金的结果，其组成范围为x = 10- 70 at百分比，y = 10-30 at百分比，并且在DELTA T = T_x- T_g = 40至124K的范围内具有较大的过冷液体区域，其中T_x =结晶起始温度，T_g =玻璃化转变温度。通过X射线衍射和差示扫描量热法的组合研究了玻璃态合金的结晶。对于x = 50-70 at％的（Ni_（50）Cu_（50））富合金，结晶是通过一个放热反应发生的，而对于（Ti_（33）Zr_（33）Hf_（33））富集的合金x = 20 = 10 at％的合金，结晶是通过一系列放热反应发生的。将Al的含量从y ＝ 10增加到30at％降低了对于宽范围的过渡金属组成x ＝ 40-70at％的非晶相的玻璃形成能力。最稳定的非晶态合金是（Ti_（33）Zr_（33）Hf_（33））_（40）（Ni_（50）Cu_（50））_（50）Al_（10），结晶温度为T_x = 818 K.但是过冷液体区域最大的非晶合金为（Ti_（33）Zr_（33）Hf_（33））_（60）（Ni_（50）Cu_（50））_（20）Al_（20）结晶玻璃化转变温度差为T_x-T_g = 124K。

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