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Beta-SiC ceramic and preparation method thereof
The invention belongs to the field of SiC ceramic composite materials, and discloses a preparation method of beta-SiC ceramic, which comprises the following steps: taking porous beta-SiC ceramic with the volume density of 2.35-2.43 g/cm < 3 > and the open pore density of 14-16% as a matrix, and carrying out a three-stage dipping-curing-cracking process, a concentration gradient is formed among the dipping slurry in the three stages, pressure curing and segmented cracking are respectively adopted in each stage, and CVI hole sealing treatment is carried out on the final beta-SiC ceramic to obtain a target product. The prepared beta-SiC ceramic has the characteristics of high purity and high density, the volume density is about 2.7-3.0 g/cm < 3 >, the apparent porosity is 0.5-4.5%, and the apparent density is 2.8-3.1 g/cm < 3 >.
本发明属于SiC陶瓷复合材料领域，公开一种β‑SiC陶瓷的制备方法，包括：以体积密度为2.35‑2.43g/cm3、开口孔隙密度为14‑16％的多孔β‑SiC陶瓷为基体，经过三阶段浸渍‑固化‑裂解工艺：以聚碳硅烷及聚硅氧烷为混合浆料，三个阶段的浸渍浆料之间形成浓度梯度、每阶段分别采用压力固化、分段裂解，并对最终的β‑SiC陶瓷进行CVI封孔处理，得到目标产品。本发明制备的β‑SiC陶瓷具有高纯度、高密度的特点，体积密度约为2.7‑3.0g/cm3，显气孔率为0.5‑4.5％，表观密度为2.8‑3.1g/cm3。
Beta-SiC ceramic and preparation method thereof
The invention belongs to the field of SiC ceramic composite materials, and discloses a preparation method of beta-SiC ceramic, which comprises the following steps: taking porous beta-SiC ceramic with the volume density of 2.35-2.43 g/cm < 3 > and the open pore density of 14-16% as a matrix, and carrying out a three-stage dipping-curing-cracking process, a concentration gradient is formed among the dipping slurry in the three stages, pressure curing and segmented cracking are respectively adopted in each stage, and CVI hole sealing treatment is carried out on the final beta-SiC ceramic to obtain a target product. The prepared beta-SiC ceramic has the characteristics of high purity and high density, the volume density is about 2.7-3.0 g/cm < 3 >, the apparent porosity is 0.5-4.5%, and the apparent density is 2.8-3.1 g/cm < 3 >.
本发明属于SiC陶瓷复合材料领域，公开一种β‑SiC陶瓷的制备方法，包括：以体积密度为2.35‑2.43g/cm3、开口孔隙密度为14‑16％的多孔β‑SiC陶瓷为基体，经过三阶段浸渍‑固化‑裂解工艺：以聚碳硅烷及聚硅氧烷为混合浆料，三个阶段的浸渍浆料之间形成浓度梯度、每阶段分别采用压力固化、分段裂解，并对最终的β‑SiC陶瓷进行CVI封孔处理，得到目标产品。本发明制备的β‑SiC陶瓷具有高纯度、高密度的特点，体积密度约为2.7‑3.0g/cm3，显气孔率为0.5‑4.5％，表观密度为2.8‑3.1g/cm3。
Beta-SiC ceramic and preparation method thereof
一种β-SiC陶瓷及其制备方法
LI JIANGTAO (author) / WU HAO (author) / WEI QINGBO (author) / GUO CHEN (author) / HU XIAOHUI (author)
2024-10-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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