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Preparation method of whisker reinforced ceramic matrix composite connecting fastener
The invention discloses a preparation method of a whisker reinforced ceramic matrix composite connecting fastener, and relates to the technical field of connecting fastener preparation, and the preparation method sequentially comprises the following steps: (1) cleaning a fiber preform, then removing a fiber surface glue coating, and then preparing a uniform and compact BN interface; (2) preparing a compact SiC matrix and a compact coating by adopting a CVD/CVI method; (3) slitting and rounding the pre-densified fiber preform according to a size standard; (4) impregnating the pre-processed sample with the SiC whisker slurry by adopting a vacuum impregnation method, and then sequentially carrying out heating curing, thread processing and high-temperature cracking; and (5) finally, depositing a SiC protective layer on the surface by adopting a CVI method. According to the preparation method, the SiC whisker reinforcing layer is prepared on the surface layer of the ceramic bolt by adopting DIP-coating and CVI processes, so that the thread form is optimized, the compactness, the extrusion resistance and the meshing precision of the thread are effectively improved, and the thread is remarkably reinforced.
本发明公开了一种晶须强化陶瓷基复合材料连接紧固件的制备方法，涉及连接紧固件制备技术领域，依次包括以下步骤：(1)清洗纤维预制体后除去纤维表面胶涂层，再制备均匀致密的BN界面；(2)采用CVD/CVI法制备致密的SiC基体和涂层；(3)按尺寸标准将预致密化后的纤维预制体切条和磨圆；(4)采用真空浸渍法使用SiC晶须浆料浸渍预加工试样，然后依次进行加热固化、加工螺纹和高温裂解；(5)最后采用CVI法在表面沉积SiC保护层。该制备方法采用Dip‑coating和CVI工艺在陶瓷螺栓表层制备SiC晶须增强层，优化了螺纹牙牙型，有效提升了螺纹牙致密性、抗挤压性能和啮合精度，螺纹牙得到显著强化。
Preparation method of whisker reinforced ceramic matrix composite connecting fastener
The invention discloses a preparation method of a whisker reinforced ceramic matrix composite connecting fastener, and relates to the technical field of connecting fastener preparation, and the preparation method sequentially comprises the following steps: (1) cleaning a fiber preform, then removing a fiber surface glue coating, and then preparing a uniform and compact BN interface; (2) preparing a compact SiC matrix and a compact coating by adopting a CVD/CVI method; (3) slitting and rounding the pre-densified fiber preform according to a size standard; (4) impregnating the pre-processed sample with the SiC whisker slurry by adopting a vacuum impregnation method, and then sequentially carrying out heating curing, thread processing and high-temperature cracking; and (5) finally, depositing a SiC protective layer on the surface by adopting a CVI method. According to the preparation method, the SiC whisker reinforcing layer is prepared on the surface layer of the ceramic bolt by adopting DIP-coating and CVI processes, so that the thread form is optimized, the compactness, the extrusion resistance and the meshing precision of the thread are effectively improved, and the thread is remarkably reinforced.
本发明公开了一种晶须强化陶瓷基复合材料连接紧固件的制备方法，涉及连接紧固件制备技术领域，依次包括以下步骤：(1)清洗纤维预制体后除去纤维表面胶涂层，再制备均匀致密的BN界面；(2)采用CVD/CVI法制备致密的SiC基体和涂层；(3)按尺寸标准将预致密化后的纤维预制体切条和磨圆；(4)采用真空浸渍法使用SiC晶须浆料浸渍预加工试样，然后依次进行加热固化、加工螺纹和高温裂解；(5)最后采用CVI法在表面沉积SiC保护层。该制备方法采用Dip‑coating和CVI工艺在陶瓷螺栓表层制备SiC晶须增强层，优化了螺纹牙牙型，有效提升了螺纹牙致密性、抗挤压性能和啮合精度，螺纹牙得到显著强化。
Preparation method of whisker reinforced ceramic matrix composite connecting fastener
一种晶须强化陶瓷基复合材料连接紧固件的制备方法
CHENG LAIFEI (author) / GUO CHUCHU (author) / FENG DANNI (author) / YE FANG (author) / ZHANG YI (author) / WANG QING (author) / LIU GUANGHAI (author)
2024-04-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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