采用高温电阻炉制备了两组Cu-43％ Zn合金,利用蒸馏法、X射线衍射(XRD)、化学分析方法研究了在氮气和空气气氛下的熔炼过程中,Cu-Zn合金的质量损失与物相转变规律及低熔点合金组元Zn的蒸发、汽化过程.并采用差示扫描量热-热重分析连用(DSC-TGA)方法考察了该合金在氮气和空气气氛下升温状态的蒸发、氧化、汽化、造渣行为.通过采用蒸馏法和化学分析方法测量样品和基体Zn含量的质量损失随时间和温度的变化曲线,得出:试样质量和合金基体Zn含量均随着蒸发温度的升高和时间的延长而降低;在温度一定的条件下,试样质量和基体Zn含量降低到一定值时,保持相对恒定;温度越高,试样质量和Zn含量剩余越少.DSC-TGA的实验结果结合kissinger,Flynn-Wall-Ozawa方程得出:在氮气和空气气氛下Cu-Zn合金汽化峰的表观激活能依次为:5815.28,5107.05 kJ·mol-1.
Two groups of Cu-43％ Zn alloys were prepared by high temperature resistance furnace.The quality loss as well as phase transform law of Cu-Zn alloy in the process of melting under nitrogen and air atmosphere were studied by distillation method,X-ray diffraction (XRD),chemical analysis method,and the evaporation and vaporization process of Zn,low melting point alloy component,was revealed.Differential scanning calorimetry and thermogravimetric analysis (DSC-TGA) technology was used to investigate the evaporation,oxidation,vaporization and slagging behavior of Cu-Zn alloy in the atmosphere of nitrogen and air.Through analyzing the mass loss curve of sample and the content of Zn in the alloy matrix changing with temperature and time measured by distillation method and chemical analysis method,it was found that the sample quality and the content of Zn in the alloy matrix decreased with the increase of evaporation temperature and time;with certain temperature,the quality of sample and the content of Zn in the alloy matrix were reduced to a certain value;the higher the temperature,the less the quality of the sample and the content of Zn.The experimental results of DSC-TGA and Kissinger,Flynn-Wall-Ozawa equation showed that the average active energy of vaporization peak of Cu-Zn alloy was 5815.28 and 5107.05 kJ·mol-1 separately under the atmosphere of nitrogen and air.
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