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Preparation method for zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material
The invention relates to a preparation method for a zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material, belongs to the field of ceramic composite materials, and solves the problems that the existing ZrC-based superhigh-temperature ceramic is hard to sinter and is low in fracture toughness. The zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material is prepared from zirconium carbide powder, silicon carbide powder and silicon nitride powder. The preparation method comprises the following steps: 1, weighing raw material powder in percent by volume, ball milling and wet mixing to obtain slurry; 2, evaporating and drying the slurry, and grinding the dried slurry to obtain mixed powder; 3, hot pressing and sintering the mixed powder, naturally cooling in a furnace and taking out to obtain the zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material. The preparation method for the zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material has the advantages that the process is simple, the cost is low, the strengthening and toughening effects are remarkable, the density of the obtained material is higher than 97.5%, and the fracture toughness value of the obtained material is increased by 3.6-4.2 times compared with the fracture toughness value of single-phase zirconium carbide ceramic.
Preparation method for zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material
The invention relates to a preparation method for a zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material, belongs to the field of ceramic composite materials, and solves the problems that the existing ZrC-based superhigh-temperature ceramic is hard to sinter and is low in fracture toughness. The zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material is prepared from zirconium carbide powder, silicon carbide powder and silicon nitride powder. The preparation method comprises the following steps: 1, weighing raw material powder in percent by volume, ball milling and wet mixing to obtain slurry; 2, evaporating and drying the slurry, and grinding the dried slurry to obtain mixed powder; 3, hot pressing and sintering the mixed powder, naturally cooling in a furnace and taking out to obtain the zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material. The preparation method for the zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material has the advantages that the process is simple, the cost is low, the strengthening and toughening effects are remarkable, the density of the obtained material is higher than 97.5%, and the fracture toughness value of the obtained material is increased by 3.6-4.2 times compared with the fracture toughness value of single-phase zirconium carbide ceramic.
Preparation method for zirconium-carbide-silicon-carbide-silicon-nitride superhigh-temperature ceramic composite material
29.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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