A method of nitrogen treatment and its auxiliary brazing ceramic matrix composite materials

A composite material, nitrogen treatment technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor wettability, difficult to achieve high-quality connection of composite components, improve wettability, facilitate industrial production, The effect of high-quality brazed joints

Active Publication Date: 2017-06-13
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that it is difficult to achieve high-quality connection of composite components due to the extremely poor wettability of the surface active solder of the ceramic matrix composite material when the existing brazing method is used to connect ceramic matrix composite materials-metal components, and provides a A kind of nitrogen treatment and method for assisting brazing ceramic matrix composites

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  • A method of nitrogen treatment and its auxiliary brazing ceramic matrix composite materials

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specific Embodiment approach 1

[0016] Specific implementation mode 1: A nitrogen treatment and a method for assisting brazing ceramic matrix composite materials described in this implementation mode are specifically carried out according to the following steps:

[0017] 1. Grind the parts to be welded of the ceramic matrix composite material and the metal material with sandpaper, and place them in an acetone solution for ultrasonic cleaning for 20 minutes to obtain the cleaned ceramic matrix composite material and the cleaned metal material;

[0018] 2. Place the cleaned ceramic matrix composite material in a plasma-enhanced chemical vapor deposition vacuum device, evacuate to below -5Pa, and feed N with a gas flow rate of 20sccm to 80sccm. 2 , adjust the vacuuming speed to control the pressure in the plasma-enhanced chemical vapor deposition vacuum device to 50Pa ~ 300Pa, and then when the pressure is 50Pa ~ 300Pa and N 2 Under the atmosphere, the temperature is raised to a working temperature of 100°C-400...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ceramic matrix composite material described in step 1 is SiO 2 Ceramic Matrix Composites, SiO 2 -BN ceramic matrix composites, quartz fiber braided ceramic matrix composites or SiO 2 glass ceramics. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the metal material described in step 1 is TC4 alloy, metal Nb, Invar alloy or Kovar alloy. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to methods for brazing ceramic matrix composite materials, in particular to a method for brazing a ceramic matrix composite material by being assisted through nitrogen treatment. The problem that when the ceramic matrix composite material and a metal component are connected through a brazing method in the prior art, due to the fact that surface activity brazing filler metal of the ceramic matrix composite material is extremely poor in wettability, high-quality connection of the composite component cannot be achieved easily can be solved. The method includes the steps that first, cleaning is conducted; second, the ceramic matrix composite material is subjected to nitrogen treatment; and third, vacuum brazing is carried out, so that the method for brazing the ceramic matrix composite material by being assisted through nitrogen treatment is completed. The method is used for brazing the ceramic matrix composite material by being assisted through nitrogen treatment.

Description

technical field [0001] The present invention relates to methods of brazing ceramic matrix composites. Background technique [0002] With its excellent thermal shock resistance, high load-carrying performance, high toughness and high reliability, ceramic matrix composites have great application prospects in the fields of weaponry, aviation, aerospace, and petrochemicals. However, the formability of ceramic matrix composites is poor, and it is difficult to make large-sized or complex components. In practical applications, the connection method is often used to make ceramic matrix composites-metal composite components to achieve their complementary advantages, which can overcome difficulties to a certain extent. . At present, the commonly used connection mechanisms of ceramic matrix composites are: physical connection mechanism (molecular force), mechanical connection mechanism (pinning structure), chemical reaction connection mechanism, and the connection is achieved by a var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/20B23K1/008B23K1/19
CPCB23K1/008B23K1/19B23K1/20B23K1/206
Inventor 亓钧雷林景煌张骜天王泽宇刘瑜琳冯吉才
Owner HARBIN INST OF TECH
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