本文選題：Cu-Zn合金 + 熔煉損耗��； 參考：《稀有金屬》2017年03期

【摘要】：采用高溫電阻爐制備了兩組Cu-43%Zn合金,利用蒸餾法、X射線衍射(XRD)、化學(xué)分析方法研究了在氮氣和空氣氣氛下的熔煉過程中,Cu-Zn合金的質(zhì)量損失與物相轉(zhuǎn)變規(guī)律及低熔點合金組元Zn的蒸發(fā)、汽化過程。并采用差示掃描量熱-熱重分析連用(DSC-TGA)方法考察了該合金在氮氣和空氣氣氛下升溫狀態(tài)的蒸發(fā)、氧化、汽化、造渣行為。通過采用蒸餾法和化學(xué)分析方法測量樣品和基體Zn含量的質(zhì)量損失隨時間和溫度的變化曲線,得出:試樣質(zhì)量和合金基體Zn含量均隨著蒸發(fā)溫度的升高和時間的延長而降低;在溫度一定的條件下,試樣質(zhì)量和基體Zn含量降低到一定值時,保持相對恒定;溫度越高,試樣質(zhì)量和Zn含量剩余越少。DSC-TGA的實驗結(jié)果結(jié)合kissinger,Flynn-WallOzawa方程得出:在氮氣和空氣氣氛下Cu-Zn合金汽化峰的表觀激活能依次為: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).
【作者單位】： 新疆大學(xué)物理科學(xué)與技術(shù)學(xué)院;西安交通大學(xué)能源動力與工程學(xué)院;
【基金】：新疆維吾爾自治區(qū)科技廳高技術(shù)發(fā)展計劃項目(201515106) 國家自然科學(xué)基金項目(51661031,11264037)資助
【分類號】：TG291

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本文編號：1997399