AbstractThis research paper provides an illustration of how to use the Spark Plasma Sintering technology (SPS) for powder materials in order to obtain lightweight ceramics (based on alumina) and describes physical principles ensuring efficiency of high heating rates for sintering high-temperature ceramics (pure silicon carbide). Optimization of SPS modes helps to produce Al2O3/ZrO2 ceramics with grain size of less than 400nm, microhardness Hv=24GPa, and crack resistance KIC=4.2MPam1/2., and ceramics of pure SiC with grain size less than 50nm, microhardness Hv=21GPa and crack resistance coefficient KIC=3.5MPam1/2.
HighlightsThe sintering driving force reduced dramatically in case of vapor diffusion.High heating rates ensure high driving force for pure silicon carbide sintering.Grain growth is’t registered until grain boundaries don’t form a continuous network.Temperature optimization is required if material density exceeds ρ~90%.SPS technology helps produce new structural ceramics for aerospace industry.
Advanced materials obtained by Spark Plasma Sintering
Acta Astronautica ; 135 ; 192-197
2016-09-01
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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