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High-performance hafnium oxide-boron nitride composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of composite ceramic materials, and discloses high-performance hafnium oxide-boron nitride composite ceramic as well as a preparation method and application thereof. The composition of the composite ceramic is HfO < 2-x > vol% BN <-y > vol% Co <-z > vol% W, x is less than or equal to 15, 0lt; y is less than or equal to 15, 0lt; z < = 15; the preparation method of the composite ceramic comprises the following steps: carrying out mold pressing on mixed powder of HfO2, Co, W and amorphous boron powder, carrying out cold isostatic pressing to prepare a green body, placing the green body in a tubular furnace, filling N2, heating to 600-800 DEG C, carrying out heat preservation, heating to 1400-1600 DEG C, and carrying out heat preservation to obtain the composite ceramic. The relative density of the composite ceramic is gt; the ceramic prepared by the preparation method disclosed by the invention has the characteristics that the hardness is 99%, the hardness is 30-45 GPa, the fracture toughness is 8-15 MPa.m < 1/2 >, the ceramic grain is 1-2 microns, the weight change rate after heat treatment at 1500-1800 DEG C is 0.2-0.8%, and the ceramic can be applied to preparation of high-temperature parts.
本发明属于复合陶瓷材料技术领域，公开了一种高性能的氧化铪‑氮化硼复合陶瓷及其制备方法和应用。该复合陶瓷组成为HfO2‑xvol％BN‑yvol％Co‑zvol％W，其中，099％，硬度30～45GPa，断裂韧性为8～15MPa·m1/2，陶瓷晶粒为1～2μm，经1500～1800℃热处理后的重量变化率为0.2～0.8％，可应用在制备高温部件中。
High-performance hafnium oxide-boron nitride composite ceramic as well as preparation method and application thereof
The invention belongs to the technical field of composite ceramic materials, and discloses high-performance hafnium oxide-boron nitride composite ceramic as well as a preparation method and application thereof. The composition of the composite ceramic is HfO < 2-x > vol% BN <-y > vol% Co <-z > vol% W, x is less than or equal to 15, 0lt; y is less than or equal to 15, 0lt; z < = 15; the preparation method of the composite ceramic comprises the following steps: carrying out mold pressing on mixed powder of HfO2, Co, W and amorphous boron powder, carrying out cold isostatic pressing to prepare a green body, placing the green body in a tubular furnace, filling N2, heating to 600-800 DEG C, carrying out heat preservation, heating to 1400-1600 DEG C, and carrying out heat preservation to obtain the composite ceramic. The relative density of the composite ceramic is gt; the ceramic prepared by the preparation method disclosed by the invention has the characteristics that the hardness is 99%, the hardness is 30-45 GPa, the fracture toughness is 8-15 MPa.m < 1/2 >, the ceramic grain is 1-2 microns, the weight change rate after heat treatment at 1500-1800 DEG C is 0.2-0.8%, and the ceramic can be applied to preparation of high-temperature parts.
本发明属于复合陶瓷材料技术领域，公开了一种高性能的氧化铪‑氮化硼复合陶瓷及其制备方法和应用。该复合陶瓷组成为HfO2‑xvol％BN‑yvol％Co‑zvol％W，其中，099％，硬度30～45GPa，断裂韧性为8～15MPa·m1/2，陶瓷晶粒为1～2μm，经1500～1800℃热处理后的重量变化率为0.2～0.8％，可应用在制备高温部件中。
High-performance hafnium oxide-boron nitride composite ceramic as well as preparation method and application thereof
一种高性能的氧化铪-氮化硼复合陶瓷及其制备方法和应用
ZHANG YAN (author) / NI BOYU (author) / PENG TAO (author) / TAN HAILONG (author)
2024-12-31
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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