Abstract
Two different types of lattice distortion are observed in the platinum-rich phases with aluminium, gallium and indium. While in the binary phases Pt 3Al(l) and Pt 3Ga(l) (homeotypic with the Ir 3Si structure), the tetragonal substructure lattice distortion shows the values c/ a>1, the ternary platinum-based representatives of the CuAu type significantly show the values of the axial ratio c/ a≪1. This tetragonal lattice distortion increases with increasing valence electron concentration. No continuous solid solution between the homologous isostructural phases Ni 3Al and Pt 3Al(h) was found either by means of rapid liquid quenching or by heat treatment of the alloys Ni 0.75− x Pt x Al 0.25. The ternary phase NiPt 2Al (CuAu type) occurs in the composition range 0.37≤ x Pt≤0.50. Structural and powder diffraction data are presented for the ternary phases NiPt 2Al, Pt 2CuAl and Pt 2CuGa (CuAu type).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
