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在三元Cu-Zr-Al非晶合金的基础上,通过运用等电子浓度和等原子尺寸成分设计规则来引入第四组元Ti,将合金系拓展到Cu-Zr-Al-Ti四元合金体系,并在该四元系的等电子浓度面和等原子尺寸面的交线上进行成分设计。对设计的合金成分采用铜模吸铸法得到直径为3 mm的棒状样品。对铸态样品微观组织的分析表明:在设计的六个合金成分中有两个成分(即:Cu58Zr33Al6 Ti3和Cu56.9 Zr31.5 Al5.6 Ti6)可以形成块体非晶合金。示差扫描量热(DSC)分析的结果表明:Cu58 Zr33 Al6 Ti3的非晶形成能力(GFA)大于Cu56.9Zr31.5Al5.6Ti6和基础成分Cu58.1Zr35.9Al6的GFA。采用X射线衍射(XRD)和透射电子显微镜(TEM)对块体非晶合金Cu58Zr33Al6Ti3的晶化过程进行了研究。结果表明,Cu58Zr33Al6Ti3块体非晶合金的晶化分两个阶段进行:合金的初始晶化主要是对应着Cu10Zr7相的析出;而晶化的第二阶段是Cu10Zr7、Cu8Zr3和AlCu2Zr(Ti)三个相同时析出。对非晶合金在等温退火过程中组织结构转变进行了分析和讨论。
Based on the ternary Cu-Zr-Al amorphous alloy, the fourth component Ti was introduced by using the rules of isoconcentration and isatomic composition design, and the alloy was extended to the Cu-Zr-Al-Ti quaternary alloy System, and in the quaternary system of electronic concentration and isomorphous surface of the line of intersection composition design. A 3 mm diameter rod sample was obtained by copper mold suction casting for the alloy composition. The microstructure of the as-cast sample shows that two of the six alloy components (ie, Cu58Zr33Al6Ti3 and Cu56.9Zr31.5Al5.6Ti6) can form bulk amorphous alloy. The results of differential scanning calorimetry (DSC) analysis show that the amorphous formation ability (GFA) of Cu58 Zr33 Al6 Ti3 is larger than that of Cu56.9Zr31.5Al5.6Ti6 and the base composition Cu58.1Zr35.9Al6. The crystallization process of Cu58Zr33Al6Ti3 bulk amorphous alloy was studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the crystallization of Cu58Zr33Al6Ti3 bulk amorphous alloy is carried out in two stages: the initial crystallization of the alloy mainly corresponds to the precipitation of Cu10Zr7 phase; and the second stage of crystallization is Cu10Zr7, Cu8Zr3 and AlCu2Zr (Ti) The same precipitation. The structural transformation of amorphous alloys during isothermal annealing was analyzed and discussed.