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首页> 外文期刊>Inorganic materials >Thermodynamic Properties of Intermediate Ni-P Phases (26-32.5 at. % P) between 971 and 1440 K
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Thermodynamic Properties of Intermediate Ni-P Phases (26-32.5 at. % P) between 971 and 1440 K

机译:971-1440 K之间的中间Ni-P相(26-32.5 at。%P)的热力学性质

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摘要

The vapor composition over and thermodynamic properties of crystalline nickel-phosphorus alloys (26-32.5 at. % P) are studied by Knudsen cell mass spectrometry between 971 and 1440 K. Mass spectra of the saturated vapor in the Ni-P system indicate the presence of the Ni~+, P_2~+, and P~+ ions. The P concentration in the vapor phase does not exceed 1 % of the P_2 concentration. The experimental data are used to evaluate the complete set of thermodynamic functions of nickel phosphides. Based on the data for the low-temperature (α, γ) and high-temperature (β, δ) forms of Ni_5P_2 and Ni_(12)P_5, the thermodynamic characteristics of the corresponding polymorphic transformations are evaluated. The results obtained for a large number of compositions under different experimental conditions (different effusion-cell and coating materials and effusion-orifice diameters) coincide to within the experimental error and are in good agreement with earlier reported phase-equilibrium data and enthalpies of formation, attesting to the high accuracy and reliability of the calculated thermodynamic functions.
机译:通过Knudsen池质谱在971 K和1440 K之间研究了结晶镍-磷合金(26-32.5 at。%P)的蒸气组成和热力学性质。Ni-P系统中饱和蒸气的质谱表明Ni〜+,P_2〜+和P〜+离子气相中的P浓度不超过P_2浓度的1%。实验数据用于评估磷化镍的完整热力学函数集。基于Ni_5P_2和Ni_(12)P_5的低温(α,γ)和高温(β,δ)形式的数据,评估了相应多晶型转变的热力学特性。在不同的实验条件下(大量的积液池和涂层材料以及积液孔的直径)获得的大量成分的结果与实验误差相吻合,并且与先前报道的相平衡数据和形成焓非常吻合,证明了所计算的热力学函数的高精度和可靠性。

著录项

  • 来源
    《Inorganic materials》 |2003年第5期|p.427-432|共6页
  • 作者单位

    Kurdyumov Institute of Metals Physics and Functional Materials, Bardin Central Research Institute for the Iron and Steel Industry, Vtoraya Baumanskaya ul. 9/23, Moscow, 107005 Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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