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Resistance heating of the gasket in a gem-anvil high pressure cell
dc.contributor.author | Balzaretti, Naira Maria | pt_BR |
dc.contributor.author | Gonzalez, E.J. | pt_BR |
dc.contributor.author | Piermarini, Gasper J. | pt_BR |
dc.contributor.author | Russell, T.P. | pt_BR |
dc.date.accessioned | 2020-01-23T04:04:45Z | pt_BR |
dc.date.issued | 1999 | pt_BR |
dc.identifier.issn | 0034-6748 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/204822 | pt_BR |
dc.description.abstract | Resistance heating of the gasket strip in a gem-anvil high pressure cell was successful in obtaining sample temperatures up to 1100 °C, under pressures up to 4.0 GPa. The heating capabilities, as well as the mechanical and chemical stability, of several different gasket strips ~two Ni-based alloys, Ta, Pt/Rh, and a Re/Mo alloy! with different design shapes, and two different single-crystal anvil materials ~diamond and cubic zirconia! were investigated. Two gasket-strip designs were found to provide optimum uniform heating conditions while decreasing the required current needed to achieve 1100 °C. Two anvil systems were investigated to reduce the temperature increase of the pressure cell body. Cubic zirconia anvils reduced the cell-body temperature to 100 °C at sample temperatures up to 1100 °C. However, zirconia anvils often failed during heating and almost always failed during cooling. Diamond anvils with cubic zirconia mounting plates also permitted temperatures up to 1100 °C to be reached without anvil failure. However, the cell-body temperature increased to 300 °C. A sealed vacuum-type chamber was employed to eliminate the problem with gasket and anvil oxidation. The optimized operating parameters reported here provide a routine method for high temperature-high pressure studies. The method was used to densify and sinter nanosize amorphous silicon nitride and g-alumina powders at high temperatures and high pressures. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Review of Scientific Instruments. Woodbury. Vol. 70, no. 11 (Nov. 1999), p. 4316-4323 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Diamante | pt_BR |
dc.subject | Zircônia | pt_BR |
dc.subject | Altas temperaturas | pt_BR |
dc.subject | Altas pressões | pt_BR |
dc.subject | Instrumentação | pt_BR |
dc.title | Resistance heating of the gasket in a gem-anvil high pressure cell | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000055635 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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