PPEM

Available Instrumentation

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If you find Instrumentation here that you are interested in, Please make Direct Contact with Individuals, Institutions, or Companies listed below:

The HPT is a stand-alone gas-medium test apparatus for rock deformation studies at high pressure and high temperature developed by Professor Mervyn Paterson at Australian National University. The HPT provides a comprehensive facility for mechanical testing of materials at confining pressures up to 500 MPa and temperatures to 1600 K. It can also provide the basic high-pressure, high temperature enviroment for hot isostatic pressing (HIP), materials synthesis, and physical property measurements. For further information and pricing on the HPT, see http://www.anuenterprise.com.au/asi/hpt.htm

Confining Pressure 500 MPa Pore Pressure 500 MPa Temperature 1600 K Max Volumetric Displacement 1900 mm3 Volumetric Resolution +/- 0.05 mm3 Max Axial Displacement 30 mm Displacement Resolution +/- 0.001 mm Max Axial Force 100 kN Force Resolution +/- 10 N Axial Strain Rate (20 mm specimen) 10-2 s-1 to 10-7 s-1 Max Torsional Displacement No Limit Rotary Displacement Resolution +/- 0.001 rad Max Torque 1000 N-m Torque Resolution 0.1 N-m Shear Strain Rate (15mm length,10mm length) 10-3 s-1 to 10-7 s-1

 

TRIAXIAL GAS APPARATUS

Parts to a Gas Pressure Medium Deformation Apparatus, including pressure vessel, are available to anyone who could put it to good scientific use. This apparatus was designed by Ed Hansen and built at the Geophysical Laboratory in the late 60's. It is a horizontal-axis, gas pressure medium (Ar) apparatus nominally designed for 10 kb (1000 MPa) confining pressure and 1000°C with space for an internal wire-wound resitance furnace. It is screw driven through a large gear box, but Rob Twiss installed an electronically controlled stepping motor, which can achieve a wide range of displacement rates without changing gears. Samples are 0.3" to 0.4" in diameter and about 0.8" long. Strain rates can be as low as practical to measure in the lab, like 10^-6 per sec and as high as ~10^-2/sec. The original pumping system used an air-driven oil pump, to pump a 1:1 oil/gas separator and a 1:10 oil/gas intensifier, however the intensifier is no longer part of this apparatus. The apparatus is available for the cost of packing and shipping (Caution: it weighs a LOT!!) along with an offer of Rob Twiss' experience with it. For details please: Contact Robert Twiss at twiss@geology.ucdavis.edu