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Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy

A technology of zirconium diboride silicon carbide and zirconium silicon carbide is applied in the field of diffusion connection between zirconium diboride silicon carbide composite materials and metal alloys, which can solve the problems of low strength of active brazing joints and enhance the joint connection strength. , high strength and plastic deformation ability, the effect of enhancing the connection strength

Active Publication Date: 2012-08-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low active brazed joint strength between existing zirconium diboride silicon carbide composite materials and metal alloys, and provide a diffusion bonding method for zirconium diboride silicon carbide composite materials and metal alloys

Method used

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specific Embodiment approach 1

[0015] Specific embodiment 1: In this embodiment, the diffusion bonding method of the zirconium diboride silicon carbide composite material and the metal alloy is carried out in the following steps:

[0016] 1. Pretreatment of zirconium diboride silicon carbide composite material and metal alloy: After polishing the zirconium diboride silicon carbide composite material and the metal alloy to be connected to it, the new surface is exposed, and the ultrasonic power is 80~120W. Wash with acetone for 5~10min, then dry;

[0017] 2. Pretreatment of the foamed nickel intermediate layer: The foamed nickel intermediate layer is cleaned with acetone for 5 to 10 minutes under the condition of 80-120W ultrasonic power, dried and placed between the zirconium diboride silicon carbide composite material and the metal alloy Compose the parts to be welded;

[0018] 3. Diffusion welding connection: place the parts to be welded obtained in step two in a vacuum diffusion welding furnace, and evacuate t...

specific Embodiment approach 2

[0025] Specific embodiment two: this embodiment is different from specific embodiment one in that in step one, the ultrasonic power is 90-110W, and acetone is used for cleaning for 6-9 minutes. The other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: this embodiment is different from specific embodiment one or two in that in step two, the ultrasonic power is 90-110W, and acetone is used for cleaning for 6-9 minutes. The other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention relates to a bonding method of a zirconium diboride-silicon carbide composite material and a metal alloy, particularly a diffusion bonding method of a zirconium diboride-silicon carbide composite material and a metal alloy. The invention aims to solve the problem of low strength of the active brazed joint of the existing zirconium diboride-silicon carbide composite material and metal alloy. The method comprises the following steps: 1. pretreating the zirconium diboride-silicon carbide composite material and the metal alloy; 2 pretreating a foam nickel middle layer; and 3. carrying out diffusion welding bonding. The method relieves the joint stress, and enhances the joint strength. The shear strength of the diffusion welding joint obtained by the method is 176.5-208.1MPa, andis enhanced by 76-197% as compared with the shear strength of the bonding joint by a brazing process. The invention can be used in the field of diffusion welding bonding.

Description

Technical field [0001] The invention relates to a method for connecting a zirconium diboride silicon carbide composite material and a metal alloy. Background technique [0002] Zirconium Diboride (ZrB 2 )-Based composite material is a new type of ultra-high temperature structural material. It has excellent high temperature chemical stability, high electrical conductivity, high thermal conductivity and strong ablation resistance. It can be widely used in aerospace, weaponry and other industries. field. However, due to the high hardness and brittleness of the zirconium diboride silicon carbide composite material, it is difficult to prepare large-scale and complex components. Therefore, to realize its reliable connection with other materials, especially high-temperature alloys, is the key to its application in the engineering field. At present, the connection method of zirconium diboride silicon carbide composite material and metal alloy mainly adopts brazing method, which uses ac...

Claims

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Application Information

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IPC IPC(8): C04B37/02
Inventor 何鹏林铁松杨卫岐
Owner HARBIN INST OF TECH
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