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The invention discloses a method for improving melt siliconizing uniformity of an MI-SiC/SiC preform and interlayer binding force of a composite material, and aims to solve the technical problems of nonuniform siliconizing of a large-size complex component and weak interlayer binding force of the composite material. And performing needling to obtain a preform with a needling array, and performing autoclave curing, high-temperature heat treatment and high-temperature vacuum melting siliconizing to obtain the MI-SiC/SiC composite material. According to the method, the carbon fiber wick matrix is introduced into the SiC fiber preform by using the needling technology, the siliconizing points of the preform are increased, the siliconizing is not limited by the size and the shape of the component by controlling the distance of the needled carbon fiber wick, and the problem that the large-size complex component is non-uniform in siliconizing or insufficient in siliconizing is effectively solved.
本发明公开了一种提高MI‑SiC/SiC预制体熔融渗硅均匀性和复合材料层间结合力的方法，目的是解决大尺寸复杂构件渗硅不均匀及复合材料的层间结合力较弱的技术问题，技术方案为：制备纤维预浸布或单向预浸带，叠层成型得到预制体，针刺获得带有针刺阵列的预制体，再经热压罐固化，高温热处理，高温真空中熔融渗硅制得MI‑SiC/SiC复合材料。本发明利用针刺技术在SiC纤维预制体中引入碳纤维灯芯矩阵，增加了预制体的渗硅点，通过控制针刺碳纤维灯芯的间距，可使渗硅不受构件的尺寸和形状的限制，有效解决了大尺寸复杂构件渗硅不均匀或者渗硅不足的难题。
The invention discloses a method for improving melt siliconizing uniformity of an MI-SiC/SiC preform and interlayer binding force of a composite material, and aims to solve the technical problems of nonuniform siliconizing of a large-size complex component and weak interlayer binding force of the composite material. And performing needling to obtain a preform with a needling array, and performing autoclave curing, high-temperature heat treatment and high-temperature vacuum melting siliconizing to obtain the MI-SiC/SiC composite material. According to the method, the carbon fiber wick matrix is introduced into the SiC fiber preform by using the needling technology, the siliconizing points of the preform are increased, the siliconizing is not limited by the size and the shape of the component by controlling the distance of the needled carbon fiber wick, and the problem that the large-size complex component is non-uniform in siliconizing or insufficient in siliconizing is effectively solved.
本发明公开了一种提高MI‑SiC/SiC预制体熔融渗硅均匀性和复合材料层间结合力的方法，目的是解决大尺寸复杂构件渗硅不均匀及复合材料的层间结合力较弱的技术问题，技术方案为：制备纤维预浸布或单向预浸带，叠层成型得到预制体，针刺获得带有针刺阵列的预制体，再经热压罐固化，高温热处理，高温真空中熔融渗硅制得MI‑SiC/SiC复合材料。本发明利用针刺技术在SiC纤维预制体中引入碳纤维灯芯矩阵，增加了预制体的渗硅点，通过控制针刺碳纤维灯芯的间距，可使渗硅不受构件的尺寸和形状的限制，有效解决了大尺寸复杂构件渗硅不均匀或者渗硅不足的难题。
Method for improving melt siliconizing uniformity of MI-SiC/SiC preform and interlayer binding force of composite material
一种提高MI-SiC/SiC预制体熔融渗硅均匀性和复合材料层间结合力的方法
MA FUGEN (author)
2023-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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