Enthalpies of formation of compounds in Al-Ni-Y system |
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作者单位: | P.Nash,H.N.Su(Thermal Processing Technology Center, Illinois Institute of Technology,10W 32nd St, Chicago, IL, 60616, USA);O.Kleppa(James Franck Institute, University of Chicago, 5640S Ellis Ave, Chicago, IL, 60637, USA) |
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摘 要: |
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Enthalpies of formation of compounds in Al-Ni-Y system |
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Authors: | PNash HNSu OKleppa |
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Abstract: | The enthalpies of formation of the ternary compounds Al4NiY, Al2NiY, Al2Ni6Y3, Al16 Ni3Y, AlNiY, Al3Ni2Y, AlNi8Y3, Al7Ni3Y2, and of the binary comp ounds 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 enthalpi es of formation of the ternary compounds show a maximum along the 50%Al (mole fr action) section. The ternary compounds appear along lines of constant yttrium content consistent with binary compound solubility extensions. |
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Keywords: | enthalpy of formation compound Al Ni Y system |
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