Strength and texture of Pt compressed to 63 GPa

Susannah M. Dorfman, Sean R. Shieh, Thomas S. Duffy

Research output: Contribution to journalArticle

7 Scopus citations

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.

Original languageEnglish (US)
Article number065901
JournalJournal of Applied Physics
Volume117
Issue number6
DOIs
StatePublished - Feb 14 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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