Enthalpies of formation of compounds in Al-Ni-Y system

Philip Nash, Hsin-Ning Su, O Kleppa

Research output: Contribution to journalArticlepeer-review

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 predictions. 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.

Original languageEnglish
Article numberUNSP 1003-6326(2002)04-0754-05
Pages (from-to)754-758
Number of pages5
JournalTransactions of Nonferrous Metals Society of China
Volume12
Issue number4
StatePublished - Aug 2002
Event4th International Workshop on Ordered Intermetallic Compounds and Advanced Materials - ZHANGJIAJIE
Duration: 8 Oct 200112 Oct 2001

Keywords

  • enthalpy of formation
  • compound
  • Al-Ni-Y system

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