Palladium/cobalt-based high-temperature brazing filler for Cf/SiC composite material brazing

A composite material and high-temperature solder technology, applied in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of poor processing performance, large manufacturing size, weak thermal shock resistance, etc., and achieve high strength, The effect of high temperature performance improvement
CN101920408AInactive Publication Date: 2010-12-22AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Publication Date
2010-12-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a palladium / cobalt-based high-temperature brazing filler for Cf / SiC composite material brazing, which comprises the following components in percentage by weight: 25.0-39.0% of Co, 0.0-4.0% of Cu, 0.0-7.0% of Ni, 4.5-15.0% of C, 0.0-2.6% of Si, 0.0-2.5% of B and the balance of Pd. The brazing filler can be used for obtaining Cf / SiC ceramic-based composite joint fittings at a brazing temperature of 1110-1250 DEG C, and the room-temperature three-point bending strength of the corresponding brazed fittings can be up to 110-170 MPa. The brazing filler is applicable to the brazing of Cf / SiC ceramic-based composite materials, SiC ceramics and SiCf / SiC ceramic-based composite materials, and is also applicable to the connection between these ceramics (or composite materials) and other ceramic materials (or composite) or metal combined fittings.
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Description

technical field

[0001] The invention belongs to the technical field of welding, and relates to a f Palladium-cobalt-based high-temperature solder for brazing of / SiC composite materials. Background technique

[0002] Ceramics and ceramic matrix composites are promising high-temperature structural ceramic materials. However, due to the poor processability of ceramic materials, weak thermal shock resistance, and the difficulty of manufacturing parts with large sizes and complex shapes, it is usually necessary to form a composite structure with metal materials for application, or to realize complex components through the connection of ceramics themselves. manufacturing.

[0003] At home and abroad on carbon fiber reinforced silicon carbide ceramic matrix composites (C f / SiC) connection research, publicly reported using AgCuTi solder (see "Material Science and Technology", vol.17, Supplement 1, 2009, p1-4, authors: Chen Bo, Xiong Huaping, Cheng Yaoyong, Mao Wei,) ; Ni-based...

Claims

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