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Multi-gradient-density boron carbide ceramic preparation method
The invention discloses a multi-gradient-density boron carbide ceramic preparation method. Ceramic powder with different granularity distributions is respectively mixed with water and dispersing agents; granulating agents are added for granulation; then, the sequential blank pre-forming from the high-density layer to the low-density layer is realized by a layered material distribution and layered pressing pre-forming method; the blank bodies are put into a mold in a direction that the high-density layer faces a movable press head; hot pressing sintering is performed in a vacuum hot pressing sintering furnace. The method has the advantages that the boron carbide powder particle diameter dimension differences and particle surface activity gradient effects are used and are combined with the relationship between the particle dimension and the sintering temperature in the boron carbide ceramic sintering process; the boron carbide powder with different granularity distribution is adopted; the multi-gradient-density blank bodies are pre-formed and prepared; the multi-gradient-density boron carbide ceramic material is prepared according to the pressure transmitting rule in the sintering process.
Multi-gradient-density boron carbide ceramic preparation method
The invention discloses a multi-gradient-density boron carbide ceramic preparation method. Ceramic powder with different granularity distributions is respectively mixed with water and dispersing agents; granulating agents are added for granulation; then, the sequential blank pre-forming from the high-density layer to the low-density layer is realized by a layered material distribution and layered pressing pre-forming method; the blank bodies are put into a mold in a direction that the high-density layer faces a movable press head; hot pressing sintering is performed in a vacuum hot pressing sintering furnace. The method has the advantages that the boron carbide powder particle diameter dimension differences and particle surface activity gradient effects are used and are combined with the relationship between the particle dimension and the sintering temperature in the boron carbide ceramic sintering process; the boron carbide powder with different granularity distribution is adopted; the multi-gradient-density blank bodies are pre-formed and prepared; the multi-gradient-density boron carbide ceramic material is prepared according to the pressure transmitting rule in the sintering process.
Multi-gradient-density boron carbide ceramic preparation method
LIU JUN (author) / CAO ZHONGWEN (author) / ZHAI WEI (author) / ZHANG JIHONG (author) / SANG JINGMAO (author)
2016-01-20
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Preparation method of high-density boron carbide ceramic
| European Patent Office | 2022
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