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Mg-6Zn-1Mn鎂合金中MgZn相析出的熱力學(xué)計(jì)算
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“973”項(xiàng)目（2007CB613700）；國家“十一五”科技支撐計(jì)劃(2006BAE04B03，2007BAQ00134-04)；國家杰出青年科學(xué)基金 (50725413)


Thermodynamic Calculation of the Precipitation Reaction of MgZn Phase in Mg-6Zn-1Mn Magnesium Alloy
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    摘要:

    以Miedema生成熱模型和Toop模型為基礎(chǔ)，參考三元合金溶體中金屬間化合物析出行為的熱力學(xué)模型，計(jì)算Mg-6Zn-1Mn（質(zhì)量分?jǐn)?shù)，下同）三元合金體系中Mg和Zn的活度，進(jìn)而求出重要強(qiáng)化相MgZn析出反應(yīng)的Gibbs自由能變化與溫度的關(guān)系，并得出其析出溫度為580 K。MgZn析出溫度的計(jì)算結(jié)果與該合金所取均勻化處理溫度相符，并得到了熱分析實(shí)驗(yàn)的進(jìn)一步驗(yàn)證

    Abstract:

    Based on the Miedema model and the Toop model, the activities of Mg and Zn in the Mg-6Zn-1Mn alloy were calculated by a thermodynamic calculation model for predicting the precipitation behaviors of the intermetallic compounds in ternary metallic alloys. The relationship between the temperatures and the Gibbs free energy change during the precipitation reaction of the primary strengthening phase MgZn was deduced. According to the calculation, the precipitating temperature of MgZn phase is 580 K, in good agreement with the homogenizing temperature of this alloy and approved by our thermal analysis experimental results

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石國梁,張丁非,戴慶偉,劉渝萍. Mg-6Zn-1Mn鎂合金中MgZn相析出的熱力學(xué)計(jì)算[J].稀有金屬材料與工程,2009,38(11):1940~1944.[Shi Guoliang, Zhang Dingfei, Dai Qingwei, Liu Yuping. Thermodynamic Calculation of the Precipitation Reaction of MgZn Phase in Mg-6Zn-1Mn Magnesium Alloy[J]. Rare Metal Materials and Engineering,2009,38(11):1940~1944.]
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  • 收稿日期:2008-10-25
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