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Large-size high-strength ceramic matrix composite special-shaped lattice structure and preparation method
The invention discloses a large-size high-strength ceramic matrix composite material special-shaped lattice structure and a preparation method, and aims to solve the problems that an existing ceramic matrix composite material lattice structure is complex in preparation process and difficult to demould, and large-size special-shaped lattice structures are difficult to produce on a large scale; the surface-core interface connecting point is insufficient in strength, the stress is concentrated, and the core rod is insufficient in strength. A primary panel is obtained through prefabricated body preparation and chemical vapor infiltration process densification treatment, a primary upper panel and a primary lower panel are obtained through semi-through hole machining, a primary core rod is obtained through cutting and polishing, the panel hole opening position, the core rod inclination angle and the placement position are designed, a resin mold is printed through the additive manufacturing technology, and the core rod is fixed. The upper panel and the lower panel are sequentially assembled, the resin mold is removed through sodium hydroxide solution melting, the lattice structure is integrally densified and formed through a chemical vapor infiltration process, and the large-size high-strength ceramic matrix composite special-shaped lattice structure is finally obtained through surface deposition treatment.
本发明公开的一种大尺寸高强陶瓷基复合材料异形点阵结构及制备方法，以解决现有陶瓷基复合材料点阵结构制备工艺复杂，脱模困难，难以规模化生产大尺寸、异形点阵结构，面芯界面连接点强度不足、应力集中、芯子杆强度不足的技术问题。本发明通过制备预制体、化学气相渗透工艺致密化处理得到初级面板，通过加工半通孔获得初级上面板和初级下面板、切削打磨获得初级芯子杆，设计面板开孔位置、芯子杆倾斜角度及摆放位置，利用增材制造技术打印树脂模具固定芯子杆，与上面板和下面板进行顺序装配，通过氢氧化钠溶液融化去除树脂模具，采用化学气相渗透工艺对点阵结构整体致密化成型，表面进行沉积处理最终得到大尺寸高强陶瓷基复合材料异形点阵结构。
Large-size high-strength ceramic matrix composite special-shaped lattice structure and preparation method
The invention discloses a large-size high-strength ceramic matrix composite material special-shaped lattice structure and a preparation method, and aims to solve the problems that an existing ceramic matrix composite material lattice structure is complex in preparation process and difficult to demould, and large-size special-shaped lattice structures are difficult to produce on a large scale; the surface-core interface connecting point is insufficient in strength, the stress is concentrated, and the core rod is insufficient in strength. A primary panel is obtained through prefabricated body preparation and chemical vapor infiltration process densification treatment, a primary upper panel and a primary lower panel are obtained through semi-through hole machining, a primary core rod is obtained through cutting and polishing, the panel hole opening position, the core rod inclination angle and the placement position are designed, a resin mold is printed through the additive manufacturing technology, and the core rod is fixed. The upper panel and the lower panel are sequentially assembled, the resin mold is removed through sodium hydroxide solution melting, the lattice structure is integrally densified and formed through a chemical vapor infiltration process, and the large-size high-strength ceramic matrix composite special-shaped lattice structure is finally obtained through surface deposition treatment.
本发明公开的一种大尺寸高强陶瓷基复合材料异形点阵结构及制备方法，以解决现有陶瓷基复合材料点阵结构制备工艺复杂，脱模困难，难以规模化生产大尺寸、异形点阵结构，面芯界面连接点强度不足、应力集中、芯子杆强度不足的技术问题。本发明通过制备预制体、化学气相渗透工艺致密化处理得到初级面板，通过加工半通孔获得初级上面板和初级下面板、切削打磨获得初级芯子杆，设计面板开孔位置、芯子杆倾斜角度及摆放位置，利用增材制造技术打印树脂模具固定芯子杆，与上面板和下面板进行顺序装配，通过氢氧化钠溶液融化去除树脂模具，采用化学气相渗透工艺对点阵结构整体致密化成型，表面进行沉积处理最终得到大尺寸高强陶瓷基复合材料异形点阵结构。
Large-size high-strength ceramic matrix composite special-shaped lattice structure and preparation method
一种大尺寸高强陶瓷基复合材料异形点阵结构及制备方法
CHEN YANFEI (author) / CHEN JUNWEI (author) / WU JING (author) / WANG YIGUANG (author) / FANG DAINING (author)
2023-04-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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