High-temperature deformation of amorphous AlPO4-based nano-composites
High-temperature compressive deformation of an amorphous aluminium phosphate nano-composite was investigated at 1200-1300 C. Microstructural and XRD investigations of sol-gel-derived material revealed an amorphous structure with a relatively high fraction of closed porosity of about 15 vol%. TEM rev...
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| Veröffentlicht in: | Journal of the European Ceramic Society 2006, Vol.26 (7), p.1179-1183 |
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| container_title | Journal of the European Ceramic Society |
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| creator | GUTIERREZ-MORA, F GORETTA, K. C SINGH, D ROUTBORT, J. L SAMBASIVAN, S STEINER, K. A ADABIE, J RANGAN, K. K |
| description | High-temperature compressive deformation of an amorphous aluminium phosphate nano-composite was investigated at 1200-1300 C. Microstructural and XRD investigations of sol-gel-derived material revealed an amorphous structure with a relatively high fraction of closed porosity of about 15 vol%. TEM revealed nanocrystallites, predominantly of carbon, dispersed in the amorphous matrix. Steady-state flow stresses were 10-50 MPa and 50-70 MPa for test temperatures of 1200 and 1300 C, respectively, as the strain rates were varied from 5 x 10 exp(-6) to 2 x 10 exp(-5)/s. Flow stresses increased with strain rates at a fixed temperature: stress exponents were 2.2-2.8 for various test temperatures, indicative of non-Newtonian flow. The non-Newtonian flow was attributed to the presence of the nanocrystalline phases. The creep resistance was found to be on a par with those of conventional oxide ceramics. 19 refs. |
| doi_str_mv | 10.1016/j.jeurceramsoc.2004.12.036 |
| format | Article |
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Flow stresses increased with strain rates at a fixed temperature: stress exponents were 2.2-2.8 for various test temperatures, indicative of non-Newtonian flow. The non-Newtonian flow was attributed to the presence of the nanocrystalline phases. The creep resistance was found to be on a par with those of conventional oxide ceramics. 19 refs.</abstract><cop>Oxford</cop><pub>Elsevier</pub><doi>10.1016/j.jeurceramsoc.2004.12.036</doi><tpages>5</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Miscellaneous Other materials Physics Specific materials Technical ceramics |
| title | High-temperature deformation of amorphous AlPO4-based nano-composites |
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