Compression of silver in a diamond anvil cell: Pressure dependences of strength and grain size from X-ray diffraction data

Liermann, HP and Jain, Anjana and Singh, AK and Saxena, SK (2010) Compression of silver in a diamond anvil cell: Pressure dependences of strength and grain size from X-ray diffraction data. Journal of Physics and Chemistry of Solids, 71 . pp. 1088-1093. ISSN 0022-3697

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    Abstract

    Two silver samples, coarse grained(c-Ag,grainsize300+30 nm)and nanocrystalline(n-Ag,grain size 55+6nm), are compressed in a diamond anvil cell in separate experiments. The pressure is increased in steps of ~3 GPa and the diffraction pattern recorded at each pressure. The grain size and compressive strength are determined from the analysis of the diffraction line-widths. The grain size of c-Ag decreases rapidly from 300+30 nm at ambient pressure to 4078 nm at 15GPa, and then gradually to 2073 nm at 40GPa. After pressure release to ambient condition, the grain size is 2574 nm. The strength at ambient pressure is 0.1870.05GPa and increases to 1.070.3GPa at 40GPa. The grain size of n-Ag decreases from 5576 nm at ambient pressure to 1774 nm at15GPa and to 1473 nm at 55 GPa. After release of pressure to ambient condition, the grain size is 5077 nm. The strength increases from 0.5170.07GPa at ambient pressure to 3.570.4 GPa at 55GPa. The strength is found to vary as the inverse of the square-root of the grain size. The results of the present measurements agree well with the grain-size dependence of strength derived from the hardness versus grain size data at ambient pressure available in the literature.

    Item Type: Journal Article
    Additional Information: Copyright for this article belongs to M/s. Elsevier Publishers
    Uncontrolled Keywords: High pressure;X-ray diffraction
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Other, Materials Science Division, Materials Science Division, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 15 Feb 2012 11:08
    Last Modified: 15 Feb 2012 11:08
    URI: http://nal-ir.nal.res.in/id/eprint/10337

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