Unlock instant, AI-driven research and patent intelligence for your innovation.

C/C and C/SiC composite material and metal connecting method

A composite material and connection method technology, applied in metal processing equipment, metal material coating process, welding/welding/cutting items, etc., can solve the problems of thrust chamber specific impulse reduction, low reliability, complex structure, etc.

Active Publication Date: 2009-08-26
GRIMAT ENG INST CO LTD
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a new method for connecting C / C, C / SiC composite materials and metals, to realize the reliable connection (welding) of C / SiC, C / C composite material nozzle pipes and metal injectors, and to effectively solve the problem of The mechanical connection method has problems such as poor sealing performance, complex structure, low reliability, and decreased specific impulse of the thrust chamber.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Connection of C / SiC to Ti6Al4V.

[0020] (1) C / SiC surface pretreatment

[0021] ① The surface of the C / SiC composite material welding area is ground with a diamond grinding wheel with a particle size of 200 mesh, and the processing volume is 0.2mm. After completion, the overall ultrasonic degreasing, cleaning, hot air drying (cleaning time, 60min; solvent, carbon tetrachloride). After cleaning, vacuum heat treatment (vacuum degree 5Pa; temperature, 1100°C; time, 60min).

[0022] ②Using the magnetron sputtering process to first sputter a layer of 3 micron thick Ti film on the surface of the C / SiC welding area, and then sputter a layer of 3 micron thick W film. After completion, the overall vacuum heat treatment of the composite material (vacuum degree is better than 3.0×10 -3 Pa; temperature, 1000° C.; time, 30 min).

[0023] (2) Preparation of gradient transition layer in C / SiC welding zone

[0024] ① Paste preparation, coating, and sintering for the first sub-lay...

Embodiment 2

[0034] C / C connection to C103 niobium alloy.

[0035] (1) C / C surface pretreatment

[0036] ① Use a diamond grinding wheel with a particle size of 200 mesh to grind the surface of the C / C composite material welding area, and the processing volume is 0.2mm. After completion, the overall ultrasonic degreasing, cleaning, hot air drying (cleaning time, 60min; solvent, carbon tetrachloride). After cleaning, vacuum heat treatment (vacuum degree 5Pa; temperature, 1100°C; time, 60min).

[0037] ②Use the magnetron sputtering process to first sputter a layer of 3 micron thick Ti film on the surface of the C / C welding area, and then sputter a layer of 3 micron thick W film. After completion, the overall vacuum heat treatment of the composite material (vacuum degree is better than 3.0×10 -3 Pa; temperature, 1000° C.; time, 30 min).

[0038] (2) Preparation of gradient transition layer in C / C welding zone

[0039] ① Paste preparation, coating, and sintering for the first sub-layer of ...

Embodiment 3

[0049] Connection of C / SiC to Ti6Al4V.

[0050] (1) C / SiC surface pretreatment

[0051] ① The surface of the C / SiC composite material welding area is ground with a diamond grinding wheel with a particle size of 200 mesh, and the processing volume is 0.2 mm. After completion, the overall ultrasonic degreasing, cleaning, hot air drying (cleaning time, 60min; solvent, carbon tetrachloride). After cleaning, vacuum heat treatment (vacuum degree 5Pa; temperature, 1100°C; time, 60min).

[0052] ②Using the magnetron sputtering process to first sputter a layer of 3 micron thick Ti film on the surface of the C / SiC welding area, and then sputter a layer of 3 micron thick W film. After completion, the overall vacuum heat treatment of the composite material (vacuum degree is better than 3.0×10 -3 Pa; temperature, 1000° C.; time, 30 min).

[0053] (2) Preparation of gradient transition layer in C / SiC welding zone

[0054] ① Paste preparation, coating, and sintering for the first sub-la...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for connecting C / SiC, C / C composite materials and metals, belonging to the technical field of connecting heterogeneous materials. The process steps are as follows: ① Surface pretreatment of C / SiC and C / C composite materials. It includes the steps of surface grinding, cleaning, vacuum bisque firing, double-layer metal film preparation, high vacuum heat treatment and other steps in the connection area. ② Coating and sintering of gradient transition layer on the surface of C / SiC and C / C composite material connection area. ③ Vacuum brazing of composite materials and metals with gradient transition layer as the bonding phase. The feature of the present invention is that the gradient transition layer is directly used as the connecting material between the composite material and the metal; the gradient transition layer is a two-layer or multi-layer (sub-layer) structure, and the melting point of the active solder used in each sub-layer gradually decreases from the composite material matrix to the outside. , the volume percentage of the thermal expansion coefficient adjusting phase decreases gradually, and the thermal expansion coefficient of the sublayer increases gradually. The brazed ceramic-metal connector of the present invention has high strength, good air tightness, and wide application range, and is suitable for the connection of various ceramics such as SiC, Si3N4, Al2O3, AlN and other non-metallic fibers and particle-reinforced ceramic-based composite materials and metals .

Description

technical field [0001] The invention relates to a connection method between C / C and C / SiC composite materials and metals, and belongs to the technical field of connection (welding) of heterogeneous materials. Background technique [0002] The space vehicle power system requires its thrust chambers (missile engine thrust chambers, satellite attitude, orbit control thrust chambers, long-range missile warhead terminal attitude modification engine thrust chambers, etc.) to have the characteristics of light weight, fast response, small size, and high reliability. This type of thrust chamber is composed of a nozzle (body) and a propellant injector (head) in a sealed connection. C fiber reinforced SiC (C / SiC), C fiber reinforced graphite (C / C) composite materials have a series of excellent properties such as: low density (general density 1.75-2.10g / cm 3 ), light weight, outstanding high temperature performance (high strength, high modulus, excellent fracture toughness and wear res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/20B23K1/19C23C28/02B22F7/04B23K103/18
Inventor 张小勇陆艳杰楚建新
Owner GRIMAT ENG INST CO LTD