Pt-Zr (Platinum-Zirconium)
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Supplemental Literature Review: Section III
Pt-Zr (Platinum-Zirconium) H. Okamoto
The Pt-Zr phase diagram in [Massalski2] showed three intermetallic compounds, Pt3Zr, PtZr (dimorphic, but the transition temperature is unknown), and Pt3Zr5. [2000Fai] discovered a new phase Pt4Zr by means of XRD and SEM. In addition, [2007Sta] discovered Pt10Zr7, Pt4Zr3, and bPtZr by means of XRD, neutron diffraction, electron microscopy, and metallography. Figure 1 shows the Pt-Zr phase diagram proposed by [2007Sta]. Table 1 shows Pt-Zr crystal structure data summarized from [Massalski2] and [2007Sta]. Table 1
References 2000Fai: G.B. Fairbank, C.J. Humphreys, A. Kelly, and C.N. Jones, Ultra-high Temperature Intermetallics for the Third Millennium, Intermetallics, 2000, 8, p 1091-1100 2007Sta: J.K. Stalick and R.M. Waterstrat, The ZirconiumPlatinum Phase Diagram, J. Alloys Compds., 2007, p 123-131
Pt-Zr crystal structure data
Phase
Composition, at.% Zr
Pearson symbol
Space group
Strukturbericht designation
Prototype
(Pt) Pt4Zr Pt3Zr Pt10Zr7 Pt4Zr3 bPtZr aPtZr Pt3Zr5 (bZr) (aZr)
0-13 17-21 22-31 40-42 42.5-46 47-54 48-53 62-65 94-100 98.5-100
cF4 hP16 cP4 oC68 hR42 cP2 oC8 hP16 cI2 hP2
Fm3m P63/mmc Pm3m Cmca R3 Pm3m Cmcm P63/mcm Im3m P63/mmc
A1 D024 L12 … … B2 Bf D88 A2 A3
Cu Ni3Ti AuCu3 Ni10Zr7 … CsCl CrB Mn5Si3 W Mg
Fig. 1 Pt-Zr phase diagram
Journal of Phase Equilibria and Diffusion Vol. 29 No. 4 2008
385
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