Effects of pressure and temperature on the yield strength of tantalum and rhenium
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The effects of pressure and temperature on the yield strength of tantalum and the effects of pressure on the yield strength of rhenium were investigated using ruby fluorescence. A new Raman system with a motorized stage and near diffraction limit was built to map 2-dimensionally, the pressures inside of a diamond anvil cell. The 2- dimensional data is used to create contour maps and surface plots of the pressures and calculate the pressure gradients induced in the samples. Using the Birch-Murnaghan equation of state, the final sample thickness, and the pressure gradients, the yield strength as a function of temperature and pressure are calculated. ii
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Motivation -- Yield strength -- Fluorescence -- High pressure research -- Ruby and pressure calibration -- Raman/fluorescence system construction -- 2D-raman/fluorescence automation -- Heating system -- Tantalum yield strength -- .Rhenium -- Future work -- Appendix A. Programming -- Appendix B. Equipment specifications
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Ph.D.