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选取 Ce,Y 作为轻、重稀土金属的代表,研究它在 Fe 液中与氮的相互作用的热力学,可能为开发稀土在钢中的应用,提供基础数据.考虑到稀土与 O,S 有很强的亲和力,本研究是在 O,S 含量很低的情况下进行的.实验用 Fe 为99.8%高纯 Fe,Ce 和 Y 的纯度均>99.5%,N 和 Ar 均经过净化处理.用电熔 MgO 坩埚熔化试样,加热至1570,1600和1650℃.在竖管钼丝炉中进行,炉温可控制在±2℃以内。测定氮用熔融脉冲热导法,分析误差约
Selecting Ce and Y as representatives of light and heavy rare earth metals and studying the thermodynamics of their interactions with nitrogen in Fe solution may provide basic data for the development of rare earths in steel. Strong affinity, this study was carried out under the condition of low content of O and S. Experimental Fe was 99.8% high purity Fe, the purity of Ce and Y were all> 99.5%, N and Ar were purified. The molten MgO crucible melts the sample and heats it to 1570, 1600 and 1650 ° C. It is carried out in a standpipe molybdenum wire furnace with a controlled oven temperature within ± 2 ° C. Determination of nitrogen by melt pulse thermal conductivity method, analysis of about error