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Title: Strength and texture of Pt compressed to 63 GPa

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.
Authors:
 [1] ;  [2] ;  [3]
  1. Earth and Planetary Science Laboratory, Ecole Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne (Switzerland)
  2. Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7 (Canada)
  3. Department of Geosciences, Princeton University, Princeton, New Jersey 08544 (United States)
Publication Date:
OSTI Identifier:
22413122
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BCC LATTICES; COMPRESSION; DIAMONDS; FCC LATTICES; GRAIN SIZE; HCP LATTICES; PARTICLE SIZE; PLATINUM; POLYCRYSTALS; PRESSURE RANGE GIGA PA; STRESSES; TEXTURE; X-RAY DIFFRACTION; YIELD STRENGTH