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Nano particle reinforced Ag-base composite brazing filler metal and preparation method thereof

A technology of nano-particles and composite solder, which is applied in the direction of manufacturing tools, welding equipment, metal processing equipment, etc., can solve the problems of low operating temperature and poor joint performance, and achieve higher operating temperature, lower thermal expansion coefficient, and solder wetting sex good effect

Inactive Publication Date: 2012-10-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems of low service temperature and poor performance of the joints obtained by brazing ceramics and metals with conventional Ag-based solders, the present invention provides a nanoparticle-reinforced Ag-based composite solder and its preparation method

Method used

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  • Nano particle reinforced Ag-base composite brazing filler metal and preparation method thereof
  • Nano particle reinforced Ag-base composite brazing filler metal and preparation method thereof
  • Nano particle reinforced Ag-base composite brazing filler metal and preparation method thereof

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specific Embodiment approach 1

[0015] Specific embodiment 1: The Ag-based composite solder reinforced by nanoparticles in this embodiment consists of 60-70 parts by weight of Ag powder, 19-29 parts of Cu powder, 4-12 parts of Ti powder and 1-10 parts of nano-Si 3 N 4 Granules are made.

specific Embodiment approach 2

[0016] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the nanoparticle-reinforced Ag-based composite solder consists of 61 to 69 parts of Ag powder, 20 to 28 parts of Cu powder, and 6 to 10 parts of Ti powder in parts by weight. And 2 to 8 parts of nano-Si 3 N 4 Granules are made. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the Ag-based composite solder reinforced by nanoparticles is composed of 65 parts of Ag powder, 25 parts of Cu powder, 8 parts of Ti powder and 5 parts of nano-Si according to parts by weight. 3 N 4 Granules are made. Others are the same as in the first embodiment.

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Abstract

The invention provides a nano particle reinforced Ag-base composite brazing filler metal and a preparation method thereof and relates to a composite brazing filler metal and a preparation method thereof. The nano particle reinforced Ag-base composite brazing filler metal can be used for solving the technical problems that a joint obtained by a soldering ceramic and metal by utilizing a common Ag-base brazing filler metal is low in service temperature and poor in performance under a high temperature environment. The brazing filler metal provided by the invention is prepared from Ag powder, Cu powder, Ti powder and nano Si3N4 particles. The method comprises the following steps of 1, preparing materials; and 2, performing ball milling, so as to obtain the nano particle reinforced Ag-base composite brazing filler metal. The shearing strength of a joint obtained by soldering Si3N4 ceramic and TiAl alloy by utilizing the composite brazing filler metal provided by the invention at a high temperature of 400 DEG C is up to 156MPa, and is three times that of the joint obtained through soldering by utilizing a commercial AgCuTi brazing filler metal, and the shearing strength of the joint at room temperature is up to 115MPa.

Description

technical field [0001] The invention relates to a composite solder and a preparation method thereof. Background technique [0002] Advanced ceramic materials have the characteristics of high temperature resistance, corrosion resistance, wear resistance, stable size, large elastic modulus, small thermal expansion coefficient, high specific strength and stable chemical properties. They are used in aviation, aerospace, military industry, nuclear energy, automobiles and cutting tools. It has broad application prospects. However, due to the poor plasticity of most ceramic materials, cold working is difficult, and it is not easy to make large-scale or complex-shaped components, their single use is limited. In the practical application of ceramic structural parts, the connection technology is often used to make ceramic-metal composite components, which can not only give full play to the excellent performance of ceramics and metals, but also reduce production costs. However, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B02C17/10
Inventor 曹健宋晓国陈海燕刘甲坤司国栋冯吉才
Owner HARBIN INST OF TECH
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