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Preparation process of continuous fiber reinforced ceramic matrix composite high-strength connecting piece
The invention relates to a preparation process of a continuous fiber reinforced ceramic matrix composite high-strength connecting piece, and aims to solve the problem that the structural strength, rigidity and fatigue resistance of a component are reduced due to the fact that the strength of the connecting piece cannot meet the quality requirements of the component in the prior art. The process comprises the following steps: 1) stacking SiC fiber two-dimensional plain cloth on a graphite mold, sewing and shaping to prepare a flat plate prefabricated body; 2) carrying out CVI deposition on theflat plate prefabricated body to prepare a flat plate prefabricated body with a carbon interface layer with the thickness of 100-350 nm; (3) performing CVI deposition on the flat plate prefabricated body with the carbon interface layer again, and preparing a SiC/SiC flat plate prefabricated body, wherein the density of the SiC/SiC flat plate prefabricated body is larger than or equal to 1.9 g/cm <3 >; (4) flatly grinding the SiC/SiC flat plate prefabricated body to the thickness required for preparing the connecting piece with the corresponding specification; 5) processing the SiC/SiC flat plate prefabricated body subjected to flat grinding into a semi-finished product connecting piece; and 6) carrying out CVI deposition on the semi-finished product connecting piece to obtain the continuous fiber reinforced ceramic matrix composite high-strength connecting piece with the density of more than or equal to 2.4 g/cm < 3 >.
本发明涉及一种连续纤维增强陶瓷基复合材料高强度连接件制备工艺，以解决现有技术中存在的连接件强度不能满足构件的质量要求，从而导致构件的结构强度、刚度以及抗疲劳性能降低的问题。该工艺包括：1)将SiC纤维二维平纹布叠铺在石墨模具上并缝制定型，制成平板预制体；2)对平板预制体进行CVI沉积，制备具有碳界面层的平板预制体，碳界面层的厚度为100～350nm；3)对具有碳界面层的平板预制体再次进行CVI沉积，制备SiC/SiC平板预制体，SiC/SiC平板预制体密度≥1.9g/cm3；4)将SiC/SiC平板预制体平磨至制备相应规格连接件所需的厚度；5)将平磨后的SiC/SiC平板预制体加工成半成品连接件；6)对半成品连接件进行CVI沉积，得到密度≥2.4g/cm3的连续纤维增强陶瓷基复合材料高强度连接件。
Preparation process of continuous fiber reinforced ceramic matrix composite high-strength connecting piece
The invention relates to a preparation process of a continuous fiber reinforced ceramic matrix composite high-strength connecting piece, and aims to solve the problem that the structural strength, rigidity and fatigue resistance of a component are reduced due to the fact that the strength of the connecting piece cannot meet the quality requirements of the component in the prior art. The process comprises the following steps: 1) stacking SiC fiber two-dimensional plain cloth on a graphite mold, sewing and shaping to prepare a flat plate prefabricated body; 2) carrying out CVI deposition on theflat plate prefabricated body to prepare a flat plate prefabricated body with a carbon interface layer with the thickness of 100-350 nm; (3) performing CVI deposition on the flat plate prefabricated body with the carbon interface layer again, and preparing a SiC/SiC flat plate prefabricated body, wherein the density of the SiC/SiC flat plate prefabricated body is larger than or equal to 1.9 g/cm <3 >; (4) flatly grinding the SiC/SiC flat plate prefabricated body to the thickness required for preparing the connecting piece with the corresponding specification; 5) processing the SiC/SiC flat plate prefabricated body subjected to flat grinding into a semi-finished product connecting piece; and 6) carrying out CVI deposition on the semi-finished product connecting piece to obtain the continuous fiber reinforced ceramic matrix composite high-strength connecting piece with the density of more than or equal to 2.4 g/cm < 3 >.
本发明涉及一种连续纤维增强陶瓷基复合材料高强度连接件制备工艺，以解决现有技术中存在的连接件强度不能满足构件的质量要求，从而导致构件的结构强度、刚度以及抗疲劳性能降低的问题。该工艺包括：1)将SiC纤维二维平纹布叠铺在石墨模具上并缝制定型，制成平板预制体；2)对平板预制体进行CVI沉积，制备具有碳界面层的平板预制体，碳界面层的厚度为100～350nm；3)对具有碳界面层的平板预制体再次进行CVI沉积，制备SiC/SiC平板预制体，SiC/SiC平板预制体密度≥1.9g/cm3；4)将SiC/SiC平板预制体平磨至制备相应规格连接件所需的厚度；5)将平磨后的SiC/SiC平板预制体加工成半成品连接件；6)对半成品连接件进行CVI沉积，得到密度≥2.4g/cm3的连续纤维增强陶瓷基复合材料高强度连接件。
Preparation process of continuous fiber reinforced ceramic matrix composite high-strength connecting piece
一种连续纤维增强陶瓷基复合材料高强度连接件制备工艺
ZHANG JIANPING (author) / LYU ZHI (author) / ZHAO BINGBING (author) / MA YUAN (author) / ZHANG SHAOBO (author) / ZHAO HUI (author) / WU YAMING (author) / SU HAILONG (author)
2021-01-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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