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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Investigation of the stable and the metastable liquidus miscibility gaps in Fe-Sn and Fe-Cu binary systems
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Investigation of the stable and the metastable liquidus miscibility gaps in Fe-Sn and Fe-Cu binary systems

机译：Fe-Sn和Fe-Cu二元系统中稳定和亚稳液相色差差距的研究

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摘要

Two kinds of experimental methods were tried in the present work: (i) the powder metallurgy method combined with differential thermal analysis (DTA) to determine the metastable liquidus miscibility gap for a Fe-Cu binary system and (ii) the high-temperature melting method combined with isothermal treatment to determine the stable liquidus miscibility gap for a Fe-Sn binary system. The experimental method was adopted according to the characteristics of the liquidus miscibility gap of the specific system. Using the powder metallurgy method, a uniform microstructure morphology and chemical composition was obtained in the DTA specimen, and the phase-separation temperature of the supercooled metastable liquid was measured. The isothermal treatment was applied for the samples inside the stable liquidus miscibility gap; here, equilibrated compositions were reached, and a layered morphology was formed after rapid cooling. The liquid miscibility gaps of the Fe-Cu and Fe-Sn binary systems were measured, and the peak temperatures of the corresponding miscibility gaps were determined to be about 1417 degrees C at x(Cu) = 0.465at% and 1350 degrees C at x(Sn) = 0.487at%, respectively. On the basis of the experimental results, both the Fe-Cu and the Fe-Sn binary systems were thermodynamically assessed.
机译：在本作工作中尝试了两种实验方法：（i）粉末冶金方法与差分热分析（DTA）结合，以确定Fe-Cu二元系统的亚稳态液相色差差距和（ii）高温熔化方法与等温处理结合，以确定Fe-Sn二元体系的稳定液相质差距。根据具体系统的液相液相色谱间隙的特征采用实验方法。使用粉末冶金方法，在DTA样本中得到均匀的微观结构形态和化学组合物，并测量过冷稳定液体的相分离温度。将等温处理施用于稳定液相质混合物间隙内的样品;这里，达到平衡的组合物，在快速冷却后形成层状的形态。测量Fe-Cu和Fe-Sn二元系统的液体混溶性间隙，并且在X（Cu）= 0.465At％和1350℃下测定相应混溶间隙的峰值温度为约1417℃。 （Sn）分别= 0.487at％。在实验结果的基础上，热力学评估Fe-Cu和Fe-Sn二元系统。

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