期刊
ELECTRIC POWER SYSTEMS RESEARCH
卷 127, 期 -, 页码 307-313出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.epsr.2015.06.009
关键词
Spark plasma sintering; Current pulses; Joule heating; Electrical contact; Papyex (R); Experimental design
资金
- LAPLACE
- Plateforme Nationale CNRS de Frittage Flash (PNF2/CNRS)
- French National Research Agency (ANR) [ANR09 MAPR-007]
In order to model the current density distribution and the temperature changes of the tools used during a spark-plasma-sintering (SPS) cycle, the variation of the power delivered by an SPS machine and the graphite-Papyex (R)-graphite electrical contacts were studied experimentally. The electric device was also characterized; in particular current pulse characteristics and their behavior with time were studied in various conditions of temperature, pulses sequences, materials and total electric power dissipated. It is well known that the performance of an electric contact is dependent on the applied pressure and the temperature. First, by varying the pressure during the SPS cycle the effect of the electric contacts is clearly seen. Secondly, in order to determine the behavior of such contacts experimentally over a pressure range of 10-50 MPa and temperatures of 50-800 degrees C, a Dcehlert experimental design was used. (C) 2015 Elsevier B.V. All rights reserved.
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