Ceramic and metal brazing composite component and preparing method thereof

A technology for metal brazing and composite components, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of limited energy absorption of the intermediate layer, ineffective crack arrest, and limited ability of the intermediate layer to relieve residual stress, etc. Achieve the effect of improving strength and thermal fatigue properties, excellent compressive stress-strain characteristics, and relieving residual stress

Inactive Publication Date: 2016-05-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing intermediate layer still has the defects of limited energy absorption and inability to effectively stop cracks
Moreover, since the residual stress increases with the increase of the joint area, and the ability of the intermediate layer to relieve the residual stress is limited, the relief effect is not ideal when the joint area between ceramics and metal is large.

Method used

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  • Ceramic and metal brazing composite component and preparing method thereof
  • Ceramic and metal brazing composite component and preparing method thereof
  • Ceramic and metal brazing composite component and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The accessories used in this example are as follows:

[0038] Ceramics to be welded: Al 2 o 3 ceramics.

[0039] Metal to be welded: 1Cr18Ni9Ti stainless steel.

[0040] Foam metal: Ni foam metal with a pore size of 0.1mm and a porosity of 90%. figure 2 shown.

[0041] Brazing filler metal: Ag-Cu-Ti filler metal, the proportion of which is Ag: 26.77wt%, Cu: 68.83wt%, Ti: 4.4wt%.

[0042] 1) Process the metal foam above into a disc of Φ10mm×0.2mm (that is, the diameter of the disc is 10mm and the thickness is 0.2mm) as the metal foam layer; process the above-mentioned solder into two discs of Φ10mm×0.1mm , respectively as the upper solder layer and the lower solder layer.

[0043] 2) Process the above-mentioned ceramics and metal to be welded into a size of Φ10mm×5mm, and use 400#, 600#, 800#, 1000# water sandpaper to polish the surface to be welded step by step to remove burrs and oxide films on the processed surface.

[0044] 3) Put the ceramics to be welded, t...

Embodiment 2

[0048] The accessories used in this example are as follows:

[0049] Ceramics to be welded: Si 3 N 4 ceramics.

[0050] Metal to be welded: Invar alloy.

[0051] Metal foam: Ni foam with a pore diameter of 0.15mm and a porosity of 80%.

[0052] Brazing filler metal: Ag-Cu-Ti filler metal, its proportion is Ag: 23wt%, Cu: 73wt%, Ti: 4wt%.

[0053] 1) Process the metal foam above into a disc of Φ10mm×0.15mm as the metal foam layer; process the above-mentioned solder into two discs of Φ10mm×0.1mm as the upper solder layer and the lower solder layer respectively.

[0054] 2) Process the above-mentioned ceramics and metal to be welded into a size of Φ10mm×5mm, and use 400#, 600#, 800#, 1000# water sandpaper to polish the surface to be welded step by step to remove burrs and oxide films on the processed surface.

[0055] 3) Put the ceramics to be welded, the metal to be welded, the solder layer and the foamed metal layer processed in the above steps 1) and 2) into acetone, ultr...

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Abstract

The invention provides a ceramic and metal brazing composite component. The composite component comprises metal, ceramic and a middle layer formed between to-be-welded faces of the ceramic and the metal; the middle layer comprises upper layer brazing filler metal, foam metal and lower layer brazing filler metal. The invention further provides a preparing method of the composite component. The preparing method comprises the steps that the upper layer brazing filler metal, the lower layer brazing filler metal and the foam metal are machined into an upper brazing filler metal layer, a lower brazing filler metal layer and a foam metal layer with the areas close to the area of the to-be-welded faces; the lower brazing filler metal layer, the foam metal layer, the upper brazing filler metal layer and to-be-welded metal are sequentially placed on the to-be-welded ceramic surface, and a certain pressure is applied to complete assembling; and an assembled sample is heated under the vacuum condition, is subject to heat preservation for a certain time, and then is cooled. The composite component has the excellent strength and thermal fatigue performance. According to the preparing method, existing materials can be directly used, complex pretreatment is avoided, and firm bonding between ceramic and metal can be achieved.

Description

technical field [0001] The invention relates to the field of ceramic and metal brazing, in particular to a ceramic and metal brazing composite component and a preparation method thereof. Background technique [0002] New structural ceramic materials have the advantages of high strength, high hardness, high temperature resistance, corrosion resistance, etc., and are widely used in machinery, chemical industry, electronics and other fields. However, due to the inherent brittleness and strength dispersion of ceramic materials, it is difficult to directly use them to manufacture parts with large sizes and complex structures, which limits their applications. In many occasions, ceramic materials need to be combined with metals with strong plasticity, toughness and impact resistance, and used in the form of connectors, so that composite components composed of ceramics and metals can obtain the complementary advantages of metal and ceramics. Meet the needs of modern engineering. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/19B23K1/20B23K103/18
CPCB23K1/008B23K1/19B23K1/20B23K1/203B23K2103/18
Inventor 郭伟贾强朱颖张羽彭鹏
Owner BEIHANG UNIV
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