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An intermediate layer assembly and method for connecting Si3N4 ceramics

An intermediate layer and ceramic technology, applied in welding medium, welding equipment, workpiece edge and other directions, can solve the problems of poor performance of brazing joints and high brittleness of brazing filler metals, and achieve the advantages of less impurity content, uniform melting, and improved joint strength. Effect

Active Publication Date: 2015-11-04
杭州坚膜新材料有限公司
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Problems solved by technology

[0008] The purpose of the present invention is to overcome brazing Si in the prior art 3 N 4 Ceramic brazing material is brittle and has poor performance of brazed joints, so it provides a new way to connect Si 3 N 4 The ceramic intermediate layer assembly and method, adopting the technical scheme of the present invention, by adjusting the composition of copper-based amorphous solder foil and adding Ta foil or Nb foil intermediate layer, the generation of residual stress in the joint area is greatly reduced , thereby greatly improving the mechanical properties of the joint

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  • An intermediate layer assembly and method for connecting Si3N4 ceramics
  • An intermediate layer assembly and method for connecting Si3N4 ceramics

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Embodiment 1

[0032] combine figure 1 , a connection Si of this embodiment 3 N 4 Ceramic intermediate layer assembly, including copper-based amorphous solder foil 2 and intermediate layer 3, the composition and content (by mass percentage) of copper-based amorphous solder foil 2 are: Ti is 20%-25%, Zr is 14%-16%, Hf 12%-14%, Ta 5%-6%, Mo 1.5%-1.8%, Nb 0.6%-0.8%, V 0.2%-0.4%, the rest is Cu, The sum of the mass percentages of each component is 100%; the middle layer 3 has one layer; the copper-based amorphous solder foil 2 has two layers, according to copper-based amorphous solder foil 2 / intermediate layer 3 / copper-based amorphous solder foil 2 in order to be closely assembled; the middle layer 3 can be Ta foil or Nb foil, wherein Ta foil is an industrial-grade product with a purity of more than 99.8% and a thickness of 0.2mm, and Nb foil is a purity of more than 99.8% and a thickness of 0.2mm industrial-grade product, the middle layer 3 is Ta foil in the present embodiment, and wherein ...

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Abstract

The invention discloses a middle layer assembly and method for connecting Si3N4 ceramic and belongs to the field of ceramic welding materials. The middle layer assembly for connecting the Si3N4 ceramic comprises copper-based amorphous solder foil and a middle layer. The copper-based amorphous solder foil comprises the components of, by weight, 20%-25% of Ti, 14%-16% of Zr, 12%-14% of Hf, 5%-6% of Ta, 1.5-1.8% of Mo, 0.6%-0.8% of Nb, 0.2%-0.4% of V, and the balance of Cu. The middle layer assembly is formed by sequentially and tightly attaching the copper-based amorphous solder foil, the middle layer and the copper-based amorphous solder foil, and the middle layer is Ta foil or Nb foil. According to the middle layer assembly and method, the components of the copper-based amorphous solder foil are adjusted, the Ta foil or Nb foil middle layer is further arranged, so that the generation of residual stress in a connector area is greatly reduced, and the mechanical property of a connector is further greatly improved.

Description

technical field [0001] The present invention relates to Si 3 N 4 The connection of ceramics, and more specifically, involves a connection of Si 3 N 4 Ceramic interlayer assembly and method. Background technique [0002] Si 3 N 4 It is not only an important representative of high-temperature structural ceramics, but also one of the main materials used in engine ceramic parts. Si 3 N 4 The theoretical density of ceramics is 3.2g cm -3 , less than alumina (3.9g·cm -3 ) and zirconia (6.1g·cm -3 )) Ceramics are only 1 / 3 of the strength of nickel-based superalloys. It has satisfactory technical indicators such as good high temperature strength, high hardness, corrosion resistance, wear resistance, thermal shock resistance and good self-lubricating performance. Currently developing Si 3 N 4 Among the engine ceramic parts mainly made of materials: heating elements include starter glow plugs and intake pre-burner spark plugs; heat-resistant parts include swirl combustio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20B23K35/30B23K3/08
CPCB23K1/008B23K1/19B23K1/20B23K33/004B23K35/0233B23K35/302
Inventor 栗慧沈洪雷潘卫华张建梅刘峰
Owner 杭州坚膜新材料有限公司
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