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Strength of polycrystalline coarse-grained platinum to and of nanocrystalline platinum to from high-pressure x-ray diffraction data
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Image of FIG. 1.
FIG. 1.

X-ray diffraction patterns of and recorded at HPCAT.

Image of FIG. 2.
FIG. 2.

X-ray diffraction patterns of recorded with a beveled-anvil diamond cell at SPring8. The Pt peaks are labeled and all other peaks are from the Re gasket.

Image of FIG. 3.
FIG. 3.

Pressure dependences of bulk , shear , and Young’s moduli from different sources. Subscript I denotes data from Ref. 9; -computed from data in Ref. 6; -computed from data in Ref. 57; -computed using and .

Image of FIG. 4.
FIG. 4.

Typical vs plots.

Image of FIG. 5.
FIG. 5.

Grain sizes of as a function of pressure from two different runs are shown by circles and squares. Unfilled symbols: increasing pressure; filled symbols: decreasing pressure.

Image of FIG. 6.
FIG. 6.

Strength as a function of pressure. from Eq. (2): filled circles: sample-A, unfilled circles: sample-B. : filled circles: from Eq. (2), unfilled circles: from Eq. (6), diamonds: data from Ref. 16

Image of FIG. 7.
FIG. 7.

Typical gamma plots for . is in angstrom units.

Image of FIG. 8.
FIG. 8.

Pressure dependence of derived from Eq. (10) for .

Image of FIG. 9.
FIG. 9.

The vs plot with and computed from Eq. (12).

Image of FIG. 10.
FIG. 10.

The pressure correction for nonhydrostatic compression effect in Pt as a function of pressure. The solid and dashed lines show pressure corrections based on measured and extrapolated strengths, respectively.


Generic image for table
Table I.

The single-crystal elastic moduli (isothermal, except those marked adiabatic) and pressure derivative of Pt at ambient pressure from different sources and the derived aggregate properties. Moduli in GPa and in .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strength of polycrystalline coarse-grained platinum to 330GPa and of nanocrystalline platinum to 70GPa from high-pressure x-ray diffraction data