a sio 2 Brazing method for ceramic matrix composites

A composite material and brazing method technology, which is applied in welding/welding/cutting items, welding equipment, manufacturing tools, etc., can solve the problems of poor wettability of active brazing filler metals, and it is difficult to achieve high-quality connection and effective connection of composite components. Achieve the effect of easy industrial production, low cost, high quality connection

Active Publication Date: 2018-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to SiO 2 The wettability of the active solder on the surface of ceramic matrix composites is extremely poor, making it difficult to achieve high-quality connections or even effective connections of composite components

Method used

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  • a sio <sub>2</sub> Brazing method for ceramic matrix composites
  • a sio <sub>2</sub> Brazing method for ceramic matrix composites

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Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1 to Figure 2 Describe this embodiment specifically, a kind of SiO described in this embodiment 2 The brazing method of the ceramic matrix composite material is specifically carried out according to the following steps:

[0020] 1. SiO 2 The ceramic matrix composite material and the metal material were polished with sandpaper respectively, and then cleaned with acetone for 10-20 minutes to obtain the cleaned SiO 2 Ceramic matrix composites and cleaned metal materials;

[0021] 2. SiO after cleaning with a punching machine 2 Blind holes are drilled on the surface of the ceramic matrix composite material to be welded, and the blind holes are evenly distributed on the SiO 2 On the surface of the ceramic matrix composite material to be welded, the diameter of the blind hole is 0.5 mm to 5 mm, the depth of the blind hole is 1 mm to 10 mm, and the distance between the blind holes is 1.0 mm to 5.0 mm, and the SiO with a por...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the SiO described in step one 2 The ceramic matrix composite is SiO 2f / SiO 2 Composite ceramics, SiO 2f / Al 2 o 3 Composite ceramics, quartz glass ceramics or SiO 2 -BN composite ceramics. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031]Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the metal material described in step 1 is Nb, TC4 titanium alloy or Invar alloy. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a brazing method of a SiO2 ceramic matrix composite material and relates to a brazing method of a composite material. The invention aims at solving the problems that existing surface active brazing filler metal for the SiO2 ceramic matrix composite material is extremely poor in wettability, high-quality connection and even effective connection of composite components are difficult to realize, and a contact has great residual stress in a brazing process as thermal expansion coefficients of the SiO2 ceramic matrix composite material and a metal material are different when a brazing method is adopted for connecting SiO2 ceramic matrix composite material-metal components. The brazing method of the SiO2 ceramic matrix composite material comprises the following steps: firstly polishing, then mechanically perforating the surface of the SiO2 ceramic matrix composite material, then carrying out plasma treatment, and finally brazing the SiO2 ceramic matrix composite material with metal. The brazing method provided by the invention is applied to the SiO2 ceramic matrix composite material.

Description

technical field [0001] The present invention relates to a brazing method for composite materials. Background technique [0002] SiO 2 Ceramic matrix composites have excellent high temperature resistance, thermal shock resistance and corrosion resistance, as well as good mechanical properties and thermophysical properties, so they have broad application prospects in aerospace, weaponry and other fields. But SiO 2 Ceramic matrix composites are difficult to process, and it is difficult to make large-sized or complex components. In practical applications, the connection method is often used to make SiO 2 Ceramic matrix composites - metal composite components, to achieve their complementary advantages, can overcome difficulties to a certain extent. Among many connection methods, brazing is applied to the connection of ceramics, composite materials and metals. It has the characteristics of simple process, high connection strength and industrialization. [0003] The brazing con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/02B23K1/20B23K103/18
CPCB23K1/20B23K2103/18C04B37/02C04B37/026C04B2237/12
Inventor 亓钧雷马蔷侯兆滨罗大林李卓然冯吉才
Owner HARBIN INST OF TECH
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