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Polymorphic microstructure SiC-TiB2-Ti3SiC2 reinforced composite ceramic as well as preparation method and application thereof
The invention relates to a polymorphic microstructure SiC-TiB2-Ti3SiC2 reinforced composite ceramic as well as a preparation method and application thereof. The invention belongs to the field of ultrahigh-temperature composite ceramic materials and preparation thereof. The invention aims to solve the technical problem that the bending strength and the fracture toughness of the existing titanium subgroup carbide composite ceramic cannot be further improved. The method comprises the following steps: mixing TiC powder, TiSi2 powder, titanium subgroup boride powder and TiH2 powder, then alternately carrying out ultrasonic treatment and ball milling to obtain composite powder, and sintering to obtain the composite ceramic. Nanoscale equiaxial SiC is generated through an in-situ reaction, the effect of pinning a grain boundary can be achieved, grain growth is inhibited, the comprehensive mechanical property of the material is remarkably improved, slat-shaped (Ti, Zr) B2 and layered Ti3SiC2 grain structures are generated in situ, so that cracks are deflected or bridged in expansion, and then the strength and toughness of the titanium subgroup carbide ceramic are greatly improved.
多形态微结构SiC‑TiB2‑Ti3SiC2强化的复合陶瓷及其制备方法和应用。本发明属于超高温复合陶瓷材料及其制备领域。本发明的目的是为了解决现有的钛副族碳化物复合陶瓷抗弯强度和断裂韧性无法进一步提高的技术问题。本发明方法：将TiC、TiSi2、钛副族硼化物和TiH2粉体混合，然后交替进行超声和球磨，得到复合粉体，烧结后，即可得到复合陶瓷。本发明通过原位反应生成纳米级等轴状SiC，可以起到钉扎晶界的作用，抑制晶粒长大，显著提高材料的综合力学性能，原位生成板条状(Ti,Zr)B2和层状Ti3SiC2晶粒结构导致裂纹在扩展中偏转或桥连，进而大幅度提高了钛副族碳化物陶瓷强度和韧性。
Polymorphic microstructure SiC-TiB2-Ti3SiC2 reinforced composite ceramic as well as preparation method and application thereof
The invention relates to a polymorphic microstructure SiC-TiB2-Ti3SiC2 reinforced composite ceramic as well as a preparation method and application thereof. The invention belongs to the field of ultrahigh-temperature composite ceramic materials and preparation thereof. The invention aims to solve the technical problem that the bending strength and the fracture toughness of the existing titanium subgroup carbide composite ceramic cannot be further improved. The method comprises the following steps: mixing TiC powder, TiSi2 powder, titanium subgroup boride powder and TiH2 powder, then alternately carrying out ultrasonic treatment and ball milling to obtain composite powder, and sintering to obtain the composite ceramic. Nanoscale equiaxial SiC is generated through an in-situ reaction, the effect of pinning a grain boundary can be achieved, grain growth is inhibited, the comprehensive mechanical property of the material is remarkably improved, slat-shaped (Ti, Zr) B2 and layered Ti3SiC2 grain structures are generated in situ, so that cracks are deflected or bridged in expansion, and then the strength and toughness of the titanium subgroup carbide ceramic are greatly improved.
多形态微结构SiC‑TiB2‑Ti3SiC2强化的复合陶瓷及其制备方法和应用。本发明属于超高温复合陶瓷材料及其制备领域。本发明的目的是为了解决现有的钛副族碳化物复合陶瓷抗弯强度和断裂韧性无法进一步提高的技术问题。本发明方法：将TiC、TiSi2、钛副族硼化物和TiH2粉体混合，然后交替进行超声和球磨，得到复合粉体，烧结后，即可得到复合陶瓷。本发明通过原位反应生成纳米级等轴状SiC，可以起到钉扎晶界的作用，抑制晶粒长大，显著提高材料的综合力学性能，原位生成板条状(Ti,Zr)B2和层状Ti3SiC2晶粒结构导致裂纹在扩展中偏转或桥连，进而大幅度提高了钛副族碳化物陶瓷强度和韧性。
Polymorphic microstructure SiC-TiB2-Ti3SiC2 reinforced composite ceramic as well as preparation method and application thereof
多形态微结构SiC-TiB2-Ti3SiC2强化的复合陶瓷及其制备方法和应用
WEI BOXIN (author) / WANG LIWEI (author) / BAI WENLONG (author) / WU YULONG (author) / FANG WENBIN (author)
2023-12-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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