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Strength and texture of Pt compressed to 63GPa

Author(s): Dorfman, Susannah M; Shieh, Sean R; Duffy, Thomas S

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Abstract: Angle- and energy-dispersive X-ray diffraction experiments in a radial geometry were performed in the diamond anvil cell on polycrystalline platinum samples at pressures up to 63 GPa. Observed yield strength and texture depend on grain size. For samples with 70–300-nm particle size, the yield strength is 5–6 GPa at ∼60 GPa. Coarse-grained (∼2-μm particles) Pt has a much lower yield strength of 1–1.5 GPa at ∼60 GPa. Face-centered cubic metals Pt and Au have lower strength to shear modulus ratio than body-centered cubic or hexagonal close-packed metals. While a 300-nm particle sample exhibits the 〈110〉 texture expected of face-centered-cubic metals under compression, smaller and larger particles show a weak mixed 〈110〉 and 〈100〉 texture under compression. Differences in texture development may also occur due to deviations from uniaxial stress under compression in the diamond anvil cell.
Publication Date: 10-Feb-2015
Citation: Dorfman, Susannah M., Sean R. Shieh, and Thomas S. Duffy. "Strength and texture of Pt compressed to 63 GPa." Journal of Applied Physics 117, no. 6 (2015): 065901. doi:10.1063/1.4907866.
DOI: doi:10.1063/1.4907866
ISSN: 0021-8979
EISSN: 1089-7550
Pages: 065901
Language: English
Type of Material: Journal Article
Journal/Proceeding Title: Journal of Applied Physics
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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