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Method for preparing boron carbide-based multiphase ceramic through in-situ reaction pressureless sintering
The invention provides a method for preparing boron carbide-based multiphase ceramic through in-situ reaction pressureless sintering, which comprises the following steps: by taking boron carbide, transition metal elementary substance Me, phenolic resin and a dispersing agent as raw materials, carrying out ball-milling mixing, and conducting heating, rotating and drying to obtain precursor powder; and granulating the precursor powder, carrying out dry pressing molding to obtain a ceramic green body, heating the ceramic green body to 2100-2300 DEG C at a speed of 5-20 DEG C/min in an argon protective gas atmosphere, carrying out heat preservation for 0.5-2 hours, and conducting cooling to room temperature by circulating water to obtain the in-situ growth second-phase toughened boron carbide-based multiphase ceramic. In addition, the invention also discloses a product prepared by the preparation method. The process is simple, the cost is low, the MeB2 toughening phase synthesized in situ through pressureless sintering is dispersed and uniformly distributed, the interface bonding with the boron carbide matrix is good, the microstructure is uniform, the density is high, the excellent comprehensive mechanical property is achieved, and the method is suitable for industrial large-scale production.
本发明提供一种原位反应无压烧结制备碳化硼基复相陶瓷的方法，以碳化硼、过渡金属单质Me、酚醛树脂和分散剂为原料，经球磨混料、加热旋转干燥而得到前驱体粉料；然后将所述前驱体粉料进行造粒、干压成型得到的陶瓷生坯，在氩气保护气体气氛中下以5～20℃/min升温至2100～2300℃，保温时间为0.5～2h，经循环水冷却至室温后即制得原位生长第二相增韧的碳化硼基复相陶瓷。此外，还公开了利用上述制备方法制得的产品。本发明工艺简洁，成本低廉，采用无压烧结原位合成的MeB2增韧相弥散均匀分布且与碳化硼基体界面结合良好，显微组织结构均匀，致密度高，具备优异的综合力学性能，适合于工业化大批量生产。
Method for preparing boron carbide-based multiphase ceramic through in-situ reaction pressureless sintering
The invention provides a method for preparing boron carbide-based multiphase ceramic through in-situ reaction pressureless sintering, which comprises the following steps: by taking boron carbide, transition metal elementary substance Me, phenolic resin and a dispersing agent as raw materials, carrying out ball-milling mixing, and conducting heating, rotating and drying to obtain precursor powder; and granulating the precursor powder, carrying out dry pressing molding to obtain a ceramic green body, heating the ceramic green body to 2100-2300 DEG C at a speed of 5-20 DEG C/min in an argon protective gas atmosphere, carrying out heat preservation for 0.5-2 hours, and conducting cooling to room temperature by circulating water to obtain the in-situ growth second-phase toughened boron carbide-based multiphase ceramic. In addition, the invention also discloses a product prepared by the preparation method. The process is simple, the cost is low, the MeB2 toughening phase synthesized in situ through pressureless sintering is dispersed and uniformly distributed, the interface bonding with the boron carbide matrix is good, the microstructure is uniform, the density is high, the excellent comprehensive mechanical property is achieved, and the method is suitable for industrial large-scale production.
本发明提供一种原位反应无压烧结制备碳化硼基复相陶瓷的方法，以碳化硼、过渡金属单质Me、酚醛树脂和分散剂为原料，经球磨混料、加热旋转干燥而得到前驱体粉料；然后将所述前驱体粉料进行造粒、干压成型得到的陶瓷生坯，在氩气保护气体气氛中下以5～20℃/min升温至2100～2300℃，保温时间为0.5～2h，经循环水冷却至室温后即制得原位生长第二相增韧的碳化硼基复相陶瓷。此外，还公开了利用上述制备方法制得的产品。本发明工艺简洁，成本低廉，采用无压烧结原位合成的MeB2增韧相弥散均匀分布且与碳化硼基体界面结合良好，显微组织结构均匀，致密度高，具备优异的综合力学性能，适合于工业化大批量生产。
Method for preparing boron carbide-based multiphase ceramic through in-situ reaction pressureless sintering
一种原位反应无压烧结制备碳化硼基复相陶瓷的方法
LIU GUANQI (author) / CHEN SHIXING (author) / YAN XIANGYU (author) / FU YUDONG (author) / WANG YUJIN (author)
2021-08-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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