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Bulk and surface properties of Al-Co and Co-Ni liquid alloys

机译:Al-Co和Co-Ni液态合金的体积和表面性能

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The energetics of mixing in Al-Co and Co-Ni liquid alloys has been analysed through the study of surface properties (surface tension and surface composition), dynamic properties (chemical diffusion and viscosity) and microscopic functions (concentration fluctuations in the long-wavelength limit and chemical short-range order parameter) in the frame of statistical mechanical theory in conjunction with quasi-lattice theory (QLT). The phase diagram of the Al-Co system exhibits the existence of different intermetallic compounds in the solid state, while a lens type phase diagram of the Co-Ni system indicates nearly ideal behaviour in both the solid and liquid phases. Since the structure of a liquid alloy is in some respects similar to that of a crystal, the complex formation phenomenon in Al-Co liquid alloys has been analysed by a quasi-lattice structural model for the chemical complexes. The energetics and structural arrangement in Co-Ni melts have been studied by the quasi-chemical approximation (QCA) for the regular solution model. (c) 2005 Elsevier B.V. All rights reserved.
机译:通过研究表面特性(表面张力和表面组成),动态特性(化学扩散和粘度)和微观功能(长波浓度波动),分析了Al-Co和Co-Ni液态合金中混合的能量。统计力学理论与准晶格理论(QLT)结合使用的极限和化学短程有序参数)。 Al-Co体系的相图在固态下表现出不同的金属间化合物的存在,而Co-Ni体系的透镜型相图表明在固相和液相中都接近理想的行为。由于液态合​​金的结构在某些方面类似于晶体的结构,因此已经通过用于化学配合物的准晶格结构模型分析了Al-Co液态合金中的配合物形成现象。对于准溶液模型,已经通过准化学近似(QCA)研究了Co-Ni熔体中的能量和结构排列。 (c)2005 Elsevier B.V.保留所有权利。

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