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Repair method for blocky SiCf/SiC ceramic matrix composite component
The invention discloses a repair method for a blocky SiCf/SiC ceramic matrix composite component. The repair method mainly comprises the steps of processing pretreatment, fiber preform repair, fiber line reinforcement, CVI deposition repair and the like. In the processing pretreatment step, a damaged material is cut and processed into a dovetail-shaped bulge, and the thickness of the part is slightly reduced, so that a space is reserved for winding of fiber wires. In the fiber prefabricated body repairing step, ceramic fibers are woven into a prefabricated body with the thickness consistent with that of the dovetail-shaped protrusion in a 2.5 D mode, an inner groove matched with the prefabricated body is machined, and the prefabricated body is spliced with a material to be repaired in a mortise and tenon joint structure mode. In the fiber line reinforcing step, SiC fiber lines are used for crosswise winding the tenon-and-mortise connection part in the mutually perpendicular direction for reinforcing. In the CVI deposition repairing step, fiber preforms and fiber lines are deposited by means of a CVI process to form the SiCf/SiC ceramic-based composite material, and the SiCf/SiC ceramic-based composite material is tightly connected with a to-be-repaired part by means of matching of a dovetail-shaped part and cross winding of the fiber lines, so that the damaged material is repaired.
本发明公开了一种用于块状SiCf/SiC陶瓷基复合材料构件的修复方法，主要包含加工预处理、纤维预制体修补、纤维线加固和CVI沉积修复等步骤。加工预处理步骤中，对受损材料进行切削加工成燕尾型凸起，并略微削减该部分厚度，为纤维线缠绕留出空间。纤维预制体修补步骤中，将陶瓷纤维以2.5D形式编织成与燕尾型凸起厚度一致的预制体，加工出与其相配合的内部凹槽，并与待修复材料以榫卯结构的形式拼接。纤维线加固步骤中，使用SiC纤维线以相互垂直的方向交叉缠绕榫卯连接部分进行加固。CVI沉积修复步骤中，借助CVI工艺沉积纤维预制体和纤维线，使其成为SiCf/SiC陶瓷基复合材料，凭借燕尾型部分的配合与纤维线的交叉缠绕和待修复部件紧密连接，实现破损材料的修复。
Repair method for blocky SiCf/SiC ceramic matrix composite component
The invention discloses a repair method for a blocky SiCf/SiC ceramic matrix composite component. The repair method mainly comprises the steps of processing pretreatment, fiber preform repair, fiber line reinforcement, CVI deposition repair and the like. In the processing pretreatment step, a damaged material is cut and processed into a dovetail-shaped bulge, and the thickness of the part is slightly reduced, so that a space is reserved for winding of fiber wires. In the fiber prefabricated body repairing step, ceramic fibers are woven into a prefabricated body with the thickness consistent with that of the dovetail-shaped protrusion in a 2.5 D mode, an inner groove matched with the prefabricated body is machined, and the prefabricated body is spliced with a material to be repaired in a mortise and tenon joint structure mode. In the fiber line reinforcing step, SiC fiber lines are used for crosswise winding the tenon-and-mortise connection part in the mutually perpendicular direction for reinforcing. In the CVI deposition repairing step, fiber preforms and fiber lines are deposited by means of a CVI process to form the SiCf/SiC ceramic-based composite material, and the SiCf/SiC ceramic-based composite material is tightly connected with a to-be-repaired part by means of matching of a dovetail-shaped part and cross winding of the fiber lines, so that the damaged material is repaired.
本发明公开了一种用于块状SiCf/SiC陶瓷基复合材料构件的修复方法，主要包含加工预处理、纤维预制体修补、纤维线加固和CVI沉积修复等步骤。加工预处理步骤中，对受损材料进行切削加工成燕尾型凸起，并略微削减该部分厚度，为纤维线缠绕留出空间。纤维预制体修补步骤中，将陶瓷纤维以2.5D形式编织成与燕尾型凸起厚度一致的预制体，加工出与其相配合的内部凹槽，并与待修复材料以榫卯结构的形式拼接。纤维线加固步骤中，使用SiC纤维线以相互垂直的方向交叉缠绕榫卯连接部分进行加固。CVI沉积修复步骤中，借助CVI工艺沉积纤维预制体和纤维线，使其成为SiCf/SiC陶瓷基复合材料，凭借燕尾型部分的配合与纤维线的交叉缠绕和待修复部件紧密连接，实现破损材料的修复。
Repair method for blocky SiCf/SiC ceramic matrix composite component
一种用于块状SiCf/SiC陶瓷基复合材料构件的修复方法
DU BAORUI (Autor:in) / LIN HONGJIAO (Autor:in) / CAI XIANGYU (Autor:in) / YAO JUN (Autor:in)
19.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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