Enthalpies of formation of compounds in Al-Ni-Y system
来源期刊：中国有色金属学报(英文版)2002年第4期
论文作者：P. Nash H.N. Su O. Kleppa
文章页码：754 - 758
Key words：enthalpy of formation; compound; Al-Ni-Y system
Abstract: The enthalpies of formation of the ternary compounds Al4NiY, Al2NiY, Al2Ni6Y3, Al16Ni3Y, AlNiY, Al3Ni2Y, AlNi8Y3, Al7Ni3Y2, and of the binary compounds Al2Y containing nickel and Ni5Y containing aluminum have been determined by high temperature reaction calorimetry. The enthalpy values measured are compared to previously published results where available as well as extended Miedema model predict ions. The melting points of the compounds were determined by DTA and X-ray diffraction was used to confirm the crystal structures of the compounds. The enthalpies of formation of the ternary compounds show a maximum along the 50%Al (mole fraction) section. The ternary compounds appear along lines of constant yttrium content consistent with binary compound solubility extensions.
