Cu-Zr-Al-Nb块体金属玻璃的非晶形成能力和力学性能（英文）

发布时间：2018-04-11 04:29

本文选题：块体非晶合金 + 非晶形成能力　；参考：《稀有金属材料与工程》2015年04期

【摘要】：采用悬浮熔炼-水冷铜模吸铸法制备不同直径的Cu46Zr44Al5Nb5非晶合金,并研究其非晶形成能力和力学性能。XRD分析、DSC曲线和透射电镜的选区电子衍射花样结果表明,直径分别为3,4,6 mm的合金棒均为全非晶结构,该合金成分具有良好的玻璃形成能力和热稳定性,其过冷液相区宽度和约化玻璃转变温度分别为52 K和0.60。由TTT曲线计算得出合金的玻璃形成临界冷却速率为3.985 K/s。不同尺寸合金棒凝固过程中的冷却速率不同,导致制得不同直径合金棒的X衍射峰强度、晶化焓和断裂强度呈现显著差异。
[Abstract]:Cu46Zr44Al5Nb5 amorphous alloys with different diameters were prepared by suspension smelting and water-cooled copper mold suction casting. The amorphous forming ability and mechanical properties of the alloys were studied.The alloy rods with diameter of 3 ~ 4 ~ 6 mm are all amorphous. The alloy has good glass forming ability and thermal stability. The width of the supercooled liquid zone and the transition temperature of the reduced glass are 52 K and 0.60 K, respectively.The critical cooling rate of glass formation is 3.985 K / s calculated from the TTT curve.The difference of cooling rate during solidification of different sizes leads to significant differences in X-ray diffraction peak strength, crystallization enthalpy and fracture strength of the alloy rods with different diameters.
【作者单位】：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室;兰州理工大学温州泵阀工程研究院;
【基金】：National Natural Science Foundation of China(50961008,51061008) “973”Program(2011CB612203) Research Fund for the Doctoral Program of Higher Education of China(20116201120003) Natural Science Foundation of Gansu Province of China(1107RJYA275);Natural Science Foundation of Zhejiang Province of China(LQ13E010002)
【分类号】：TG139.8

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