Cu-Zn合金熔炼损耗与蒸发过程的动力学研究

发布时间：2018-06-08 22:18

本文选题：Cu-Zn合金 + 熔炼损耗　；参考：《稀有金属》2017年03期

【摘要】：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-WallOzawa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 k J·mol~(-1)。
[Abstract]:Two sets of Cu-43 Zn alloys were prepared by high temperature resistance furnace. The mass loss and phase transition of Cu-Zn alloy in nitrogen and air atmosphere and the evaporation and vaporization of Zn in low melting point alloy were studied by means of X-ray diffraction and chemical analysis. The evaporation, oxidation, vaporization and slagging behavior of the alloy in nitrogen and air atmosphere were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (DSC-TGA). The mass loss curves of Zn content in samples and matrix with time and temperature were measured by distillation and chemical analysis. The results showed that both sample mass and Zn content of alloy matrix decreased with the increase of evaporation temperature and the prolongation of time. When the mass of the sample and Zn content of the matrix decrease to a certain value at a certain temperature, the sample remains relatively constant, and the higher the temperature, the higher the temperature. The experimental results of DSC-TGA combined with kissingernn-WallOzawa equation show that the apparent activation energy of the vaporization peak of Cu-Zn alloy in nitrogen and air atmosphere is 5107.05 kJ / mol ~ (-1) ~ (-1).
【作者单位】：新疆大学物理科学与技术学院;西安交通大学能源动力与工程学院;
【基金】：新疆维吾尔自治区科技厅高技术发展计划项目(201515106) 国家自然科学基金项目(51661031,11264037)资助
【分类号】：TG291

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