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Connection method of silicon nitride ceramic/nickel-based superalloy

A nickel-based superalloy, silicon nitride ceramic technology, applied in welding/welding/cutting items, welding equipment, metal processing equipment, etc., can solve problems such as thermal mismatch, and achieve the effect of simple operation

Active Publication Date: 2022-03-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the problem of thermal mismatch is the biggest obstacle in the connection process

Method used

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  • Connection method of silicon nitride ceramic/nickel-based superalloy
  • Connection method of silicon nitride ceramic/nickel-based superalloy
  • Connection method of silicon nitride ceramic/nickel-based superalloy

Examples

Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode is a connection method of silicon nitride ceramics / nickel-based superalloy, which is specifically carried out according to the following steps:

[0022] 1. Process each layer of the middle layer foil to the same size as the base metal surface to be welded, then put it into absolute ethanol for ultrasonic cleaning, and put it in an oven for drying;

[0023] Each layer in the middle layer foil is an upper layer metal, a middle layer metal and a lower layer metal, wherein the upper layer metal is Ti foil, the middle layer metal is Au foil, and the lower layer metal is Ni foil or Ni foil / Ni foam;

[0024] Second, the pretreated Si 3 N 4 Ceramics and pretreated nickel-based alloys are cleaned by ultrasonic waves;

[0025] 3. Place the lower metal, the middle metal and the upper metal in the middle layer foil from bottom to top on the surface to be welded of the nickel-based alloy, and place the surface to be welded o...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that: the thickness of the upper metal in step 1 is 10 μm to 20 μm; the thickness of the middle metal is 20 μm to 30 μm; the thickness of the lower metal is 300 μm to 3 mm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment 3: This embodiment differs from specific embodiment 1 or 2 in that: in step 1, put it into absolute ethanol and ultrasonically clean it for 2 minutes to 3 minutes. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a connection method for silicon nitride ceramic / nickel-based superalloy, and relates to a connection method for ceramic / superalloy. The invention aims to solve the technical problem of thermal mismatch of connection of ceramic and high-temperature alloy at present. The method is easy to operate, direct brazing of the ceramic and the metal is achieved without any modification treatment on the surface of the sample to be welded before welding, and effective connection of the ceramic and the metal can be achieved by adding the middle layer; the Ni layer in the middle layer can be connected with the nickel-based high-temperature alloy without adding an auxiliary layer under the condition that the requirement for isothermal solidification of the ceramic side is met, the complexity of sample assembly is simplified, and experimental materials are saved.

Description

technical field [0001] The invention relates to a connection method for ceramics / superalloys. Background technique [0002] Ceramics have excellent high-temperature performance, but due to their inherent brittleness, it is difficult to make large and complex components. Metal materials have good plasticity and are easy to process and shape, but their wear resistance and creep resistance are relatively poor compared with ceramics. Therefore, it will be of great application value to prepare composite components by connecting ceramics and superalloys for high-temperature applications. But the problem of thermal mismatch is the biggest obstacle in the connection process. The partial instantaneous liquid phase diffusion method has the advantages of brazing and diffusion connection, and can obtain high-temperature-resistant joints whose connection temperature is lower than the service temperature. It is a connection method with development prospects. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/19B23K1/20B23K103/18
CPCB23K1/008B23K1/19B23K1/20B23K1/206B23K2103/18
Inventor 张杰文粤孙良博刘春凤
Owner HARBIN INST OF TECH
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