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Method for preparing TiB2-TiC-TiB composite ceramic at low temperature
The invention relates to a method for preparing TiB2-TiC-TiB composite ceramic at low temperature, and belongs to the field of composite materials. According to the method, mixed powder of TiB2, TiC, Ti and Y2O3 is selected as a raw material, Y2O3 and Al2O3 (or Al (OH) 3) are used as sintering aids, and sintering is performed by adopting a spark plasma sintering system, so that the TiB2-TiC-TiB composite ceramic can be densified at a relatively low sintering temperature, and the TiB2-TiC-TiB composite ceramic obtained by sintering is low in densification temperature, high in density, high in hardness, good in toughness and excellent in comprehensive performance; the density of the TiB2-based composite ceramic reaches 99.1%, the Vickers hardness value reaches 25 Gpa, the bending strength value reaches 647 MPa, and the fracture toughness value reaches 6.3 MPa.m < 1/2 >. Great application prospects are realized.
本发明涉及一种低温制备TiB2‑TiC‑TiB复合陶瓷的方法，属于复合材料领域。该方法选用TiB2，TiC，Ti，Y2O3混合粉末为原料，Y2O3和Al2O3(或Al(OH)3)为烧结助剂，采用放电等离子烧结系统进行烧结，使TiB2‑TiC‑TiB复合陶瓷能在较低的烧结温度实现致密化，烧结得到的TiB2‑TiC‑TiB复合陶瓷致密化温度低，致密度高，硬度高，韧性好，具有优良的综合性能；所述TiB2基复合陶瓷致密度达99.1％，维氏硬度值达25Gpa，弯曲强度值达647MPa，断裂韧性值达6.3MPa·m1/2。具有极大应用前景。
Method for preparing TiB2-TiC-TiB composite ceramic at low temperature
The invention relates to a method for preparing TiB2-TiC-TiB composite ceramic at low temperature, and belongs to the field of composite materials. According to the method, mixed powder of TiB2, TiC, Ti and Y2O3 is selected as a raw material, Y2O3 and Al2O3 (or Al (OH) 3) are used as sintering aids, and sintering is performed by adopting a spark plasma sintering system, so that the TiB2-TiC-TiB composite ceramic can be densified at a relatively low sintering temperature, and the TiB2-TiC-TiB composite ceramic obtained by sintering is low in densification temperature, high in density, high in hardness, good in toughness and excellent in comprehensive performance; the density of the TiB2-based composite ceramic reaches 99.1%, the Vickers hardness value reaches 25 Gpa, the bending strength value reaches 647 MPa, and the fracture toughness value reaches 6.3 MPa.m < 1/2 >. Great application prospects are realized.
本发明涉及一种低温制备TiB2‑TiC‑TiB复合陶瓷的方法，属于复合材料领域。该方法选用TiB2，TiC，Ti，Y2O3混合粉末为原料，Y2O3和Al2O3(或Al(OH)3)为烧结助剂，采用放电等离子烧结系统进行烧结，使TiB2‑TiC‑TiB复合陶瓷能在较低的烧结温度实现致密化，烧结得到的TiB2‑TiC‑TiB复合陶瓷致密化温度低，致密度高，硬度高，韧性好，具有优良的综合性能；所述TiB2基复合陶瓷致密度达99.1％，维氏硬度值达25Gpa，弯曲强度值达647MPa，断裂韧性值达6.3MPa·m1/2。具有极大应用前景。
Method for preparing TiB2-TiC-TiB composite ceramic at low temperature
一种低温制备TiB2-TiC-TiB复合陶瓷的方法
ZHANG CHAOHUI (author) / CHENG XINGWANG (author) / LIU LUOJIN (author) / XIONG ZHIPING (author) / ZHANG HONGMEI (author)
2024-02-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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