A study of the Al-Pt-Ir phase diagram

作者：Grushko B^*; Samuha S; Meshi L

来源：Journal of Alloys and Compounds, 2015, 646: 873-878.

DOI：10.1016/j.jallcom.2015.06.118

• Transition metal alloys and compounds
• Phase diagrams
• Crystal structure

Phase equilibria in Al-Pt-Ir were studied up to 50 at.% Al at 1100 degrees C, up to 70 at.% Al at 900 degrees C and up to 75 at.% Al at 810 degrees C. At elevated temperatures the isostructural AlIr and high-temperature AlPt beta-phases probably form a continuous compositional region. The ternary extensions of the phases Al4Pt, Al21Pt8, Al3Pt2 and low-temperature AlPt were revealed along approximately constant Al concentrations up to 15, 11, 20 and 10 at.% Ir, respectively. The Al-Ir C-phase dissolved up to 12 at.% Pt, and the chi-phase propagated up to almost Al3Pt. A new ternary B-phase (I4(1)/acd, a = 0.86250, c = 2.18409 nm) was revealed around Al69Pt7Ir24. Its structural model was derived from the electron diffraction data.

• 出版日期2015-10-15