Improvements to Griggs-type apparatus for mechanical testing at high pressures and temperatures |
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| Authors: | Tracy N Tingle Harry W Green Jr Thomas E Young Ted A Koczynski |
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| Institution: | (1) Department of Geology, University of California, 95616 Davis, CA, USA;(2) Rock Mechanics, Lamont-Doherty Earth Observatory, 10984 Palisades, NY, USA;(3) Present address: Department of Geological and Environmental Sciences, Stanford University, 94305 Stanford, CA, USA;(4) Present address: Department of Earth Sciences and Institute of Geophysics and Planetary Physics, University of California, 92521-0412 Riverside, CA, USA |
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| Abstract: | New and improved techniques and apparatus for testing the mechanical properties of materials at high presures and temperatures are described. These include an improved Griggs-type deformation apparatus designed to operate to 5 GPa and associated servo-controlled hydraulic drive and electronics, the design of hydrostatic (molten alkali halide mixtures) pressure assemblies to measure flow stresses as low as a few MPa, the characterization of temperature gradients and friction in such assemblies, measurement of the melting curve of an alkali halide mixture used as a confining pressure medium, and the measurement of acoustic emissions. |
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| Keywords: | Pressure temperature stress measurement acoustic emissions deformation techniques |
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