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Fully-compact binder-free tungsten carbide ceramic and preparation method thereof
The invention discloses fully-compact binder-free tungsten carbide ceramic and a preparation method thereof, and belongs to the technical field of material preparation. Nano-diamond powder and metal tungsten powder are used as basic composition powder, and a small amount of additional carbon source is added as carbon supplement to jointly form green body powder; and then carrying out high-temperature pressure sintering on the mixed green body powder to obtain the fully-dense binder-free tungsten carbide ceramic. The fully-dense binder-free tungsten carbide ceramic prepared by the method disclosed by the invention can have extremely high thermal stability, corrosion resistance, hardness and wear resistance without introducing any metal additive; and under the condition of ensuring that the grain size is coarse grain, 99% of relative density can be achieved through a specific densification mechanism, and the hardness and the fracture toughness are higher than those of common non-compact coarse grain tungsten carbide.
本发明公开了一种全致密无粘结剂碳化钨陶瓷及其制备方法，属于材料制备技术领域。本发明通过以纳米金刚石粉体和金属钨粉作为基本组成粉体，并添加少量额外碳源作为碳补充，共同组成生胚粉体；随后对混合后的生胚粉体进行高温加压烧结即得到全致密无粘结剂碳化钨陶瓷。本发明制备的全致密无粘结剂碳化钨陶瓷无需引入任何金属添加剂，即可具有极高的热稳定性、耐腐蚀性、硬度和耐磨性；及在保证晶粒尺寸为粗晶的情况下，通过特有的致密化机制，即可达到99％的相对密度，且硬度和断裂韧性均高于普通不致密的粗晶碳化钨。
Fully-compact binder-free tungsten carbide ceramic and preparation method thereof
The invention discloses fully-compact binder-free tungsten carbide ceramic and a preparation method thereof, and belongs to the technical field of material preparation. Nano-diamond powder and metal tungsten powder are used as basic composition powder, and a small amount of additional carbon source is added as carbon supplement to jointly form green body powder; and then carrying out high-temperature pressure sintering on the mixed green body powder to obtain the fully-dense binder-free tungsten carbide ceramic. The fully-dense binder-free tungsten carbide ceramic prepared by the method disclosed by the invention can have extremely high thermal stability, corrosion resistance, hardness and wear resistance without introducing any metal additive; and under the condition of ensuring that the grain size is coarse grain, 99% of relative density can be achieved through a specific densification mechanism, and the hardness and the fracture toughness are higher than those of common non-compact coarse grain tungsten carbide.
本发明公开了一种全致密无粘结剂碳化钨陶瓷及其制备方法，属于材料制备技术领域。本发明通过以纳米金刚石粉体和金属钨粉作为基本组成粉体，并添加少量额外碳源作为碳补充，共同组成生胚粉体；随后对混合后的生胚粉体进行高温加压烧结即得到全致密无粘结剂碳化钨陶瓷。本发明制备的全致密无粘结剂碳化钨陶瓷无需引入任何金属添加剂，即可具有极高的热稳定性、耐腐蚀性、硬度和耐磨性；及在保证晶粒尺寸为粗晶的情况下，通过特有的致密化机制，即可达到99％的相对密度，且硬度和断裂韧性均高于普通不致密的粗晶碳化钨。
Fully-compact binder-free tungsten carbide ceramic and preparation method thereof
一种全致密无粘结剂碳化钨陶瓷及其制备方法
LI JIANLIN (author) / ZHANG PEI (author) / MIAO YIMIN (author)
2022-04-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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