Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of SiC/SiC composite material variable cross-section U-shaped component
The invention relates to a preparation method of a SiC/SiC composite material variable cross-section U-shaped component. The preparation method comprises the following steps: (1) designing a mold; (2) laying, namely laying a plurality of layers of SiC fiber woven cloth on a male mold for bonding, and then mounting the multilayer SiC fiber woven cloth on a female mold for molding, so as to obtain U-shaped laying fiber cloth with a variable cross section; (3) sewing: taking down the laminated fiber cloth in the mold, and performing 2D sewing on the laminated fiber cloth by using SiC fibers to obtain a variable cross-section U-shaped 2D sewing fiber preform; (4) die filling: filling the variable cross-section U-shaped 2D suture fiber preform into a male die and assembling a female die to obtain a variable cross-section U-shaped 2D suture fiber preform with a die; (5) preparing an interface layer; (6) precursor impregnation and high-temperature cracking; (7) primary densification; and (8) further densification is carried out, and a densified variable cross-section U-shaped component blank is obtained. The method disclosed by the invention is low in cost and simple in process, and can prevent fiber wrinkles at the variable cross section and reduce fiber damage.
本发明涉及一种SiC/SiC复合材料变截面U型构件的制备方法，包括(1)模具设计；(2)铺层：将多层SiC纤维机织布铺叠于阳模上粘接后装上阴模压型，得到变截面U型的铺层纤维布；(3)缝合：将模具中的叠层纤维布取下，用SiC纤维对其进行2D缝合，得到变截面U型2D缝合纤维预制体；(4)装模：将变截面U型2D缝合纤维预制体装入阳模并组装阴模，得到带模具的变截面U型2D缝合纤维预制体；(5)界面层制备；(6)先驱体浸渍和高温裂解；(7)初步致密化；(8)进一步致密化，得到致密化的变截面U型构件坯体。本发明的方法成本低工艺简单，可防止变截面处的纤维褶皱，降低纤维损伤。
Preparation method of SiC/SiC composite material variable cross-section U-shaped component
The invention relates to a preparation method of a SiC/SiC composite material variable cross-section U-shaped component. The preparation method comprises the following steps: (1) designing a mold; (2) laying, namely laying a plurality of layers of SiC fiber woven cloth on a male mold for bonding, and then mounting the multilayer SiC fiber woven cloth on a female mold for molding, so as to obtain U-shaped laying fiber cloth with a variable cross section; (3) sewing: taking down the laminated fiber cloth in the mold, and performing 2D sewing on the laminated fiber cloth by using SiC fibers to obtain a variable cross-section U-shaped 2D sewing fiber preform; (4) die filling: filling the variable cross-section U-shaped 2D suture fiber preform into a male die and assembling a female die to obtain a variable cross-section U-shaped 2D suture fiber preform with a die; (5) preparing an interface layer; (6) precursor impregnation and high-temperature cracking; (7) primary densification; and (8) further densification is carried out, and a densified variable cross-section U-shaped component blank is obtained. The method disclosed by the invention is low in cost and simple in process, and can prevent fiber wrinkles at the variable cross section and reduce fiber damage.
本发明涉及一种SiC/SiC复合材料变截面U型构件的制备方法，包括(1)模具设计；(2)铺层：将多层SiC纤维机织布铺叠于阳模上粘接后装上阴模压型，得到变截面U型的铺层纤维布；(3)缝合：将模具中的叠层纤维布取下，用SiC纤维对其进行2D缝合，得到变截面U型2D缝合纤维预制体；(4)装模：将变截面U型2D缝合纤维预制体装入阳模并组装阴模，得到带模具的变截面U型2D缝合纤维预制体；(5)界面层制备；(6)先驱体浸渍和高温裂解；(7)初步致密化；(8)进一步致密化，得到致密化的变截面U型构件坯体。本发明的方法成本低工艺简单，可防止变截面处的纤维褶皱，降低纤维损伤。
Preparation method of SiC/SiC composite material variable cross-section U-shaped component
一种SiC/SiC复合材料变截面U型构件的制备方法
LIU SHIJIAN (Autor:in) / QIU HAIPENG (Autor:in) / LIU SHANHUA (Autor:in) / WANG LING (Autor:in) / ZHANG BINGYU (Autor:in) / CHEN MINGWEI (Autor:in) / XIE WEIJIE (Autor:in) / ZHAO YULIANG (Autor:in) / GUAN HONG (Autor:in) / WANG QIMING (Autor:in)
29.07.2022
Patent
Elektronische Ressource
Chinesisch
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