Journal
JOURNAL OF MATERIALS SCIENCE
Volume 45, Issue 19, Pages 5191-5195Publisher
SPRINGER
DOI: 10.1007/s10853-010-4556-7
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Funding
- Deutsche Forschungsgemeinschaft [GU993-1/1]
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The master sintering curve approach was extended theoretically to the Field-Assisted Sintering Technique (or SPS). Experimental data from constant heating rate testing confirm the general applicability of this framework. An apparent activation energy of similar to 290 kJ/mol was found for ultrafine alumina below 1200 A degrees C. As alumina densifies by grain boundary diffusion in the present conditions, this low value of the apparent activation energy might be due to thermal gradients in the specimens induced by rapid heating.
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