Silver/molybdenum/silver metal-based layered composite material and preparation process thereof

A composite material and metal-based technology, applied in the direction of metal layered products, metal rolling, layered products, etc., can solve the problems of silver layer corrosion and shedding failure, low adhesion strength, poor resistance to air pollution, etc., to achieve deformation Large difference in resistance, low cost, and good heat resistance

Pending Publication Date: 2022-01-14
江苏欣恒蕴精密零件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some special electronic and electrical fields, the temperature will change drastically and cause thermal shock. The pure silver material is soft and has low strength, which is prone to fracture and failure.
Molybdenum has excellent heat resistance, high temperature mechanical properties and stable expansion coefficient, so it has been introduced into related industries and has been applied, but molybdenum has the characteristics of poor electrical conductivity and poor air pollution resistance
In order to solve such problems of molybdenum, silver-plated molybdenum foil is generally used in the industry to solve this problem, but due to the electroplating chemical deposition method, the adhesion strength is not high, and the thickness of the electroplating layer is relatively thin (usually the thickness of electroplating Between 1μ-2mμ), under the action of thermal stress, the silver layer on the surface of the electroplating material is prone to corrosion and peeling failure

Method used

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  • Silver/molybdenum/silver metal-based layered composite material and preparation process thereof

Examples

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Effect test

Embodiment 1

[0026] The present invention proposes a silver / molybdenum / silver metal-based composite material, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 25 mm and a total thickness of 27 μm, in which the first and third layers are both silver layers 1 with a thickness of 6 μm, and the oxygen content is lower than 50 ppm. The layer is molybdenum layer 2 with a thickness of 15 μm.

[0027] The present invention also proposes a preparation process of a silver / molybdenum / silver metal-based layered composite material, comprising the following steps:

[0028] Step 1: Put the pure silver plate with a purity greater than 99.99% through two vacuum smelting methods to smelt the silver plate with an oxygen content lower than 50ppm. The vacuum degree of the smelting equipment during the vacuum smelting process is not less than 10 -2 Pa. The above-mentioned silver plates are processed into silver strips with a thickness of 0.6 mm and a w...

Embodiment 2

[0034] The present invention proposes a silver / molybdenum / silver metal-based composite material, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 75 mm and a total thickness of 42 μm, in which the first and third layers are both silver layers 1 with a thickness of 6 μm, and the oxygen content is lower than 50 ppm. The layer is molybdenum layer 2 with a thickness of 30 μm.

[0035] The present invention also proposes a preparation process of a silver / molybdenum / silver metal-based layered composite material, comprising the following steps:

[0036] Step 1, the pure silver plate with a purity greater than 99.99% is smelted three times through vacuum smelting to produce a silver plate with an oxygen content of less than 50ppm, and the vacuum degree of the smelting equipment during the vacuum smelting process is not less than 10 -2 Pa. The above-mentioned silver plates are processed into silver strips with a thickness of 0...

Embodiment 3

[0042] The present invention proposes a silver / molybdenum / silver metal-based composite material, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 95 mm and a total thickness of 57 μm, in which the first and third layers are both silver layers 1 with a thickness of 6 μm, and the oxygen content is lower than 50 ppm. The layer is molybdenum layer 2 with a thickness of 45 μm.

[0043] The present invention also proposes a preparation process of a silver / molybdenum / silver metal-based layered composite material, comprising the following steps:

[0044] Step 1, the pure silver plate with a purity greater than 99.99% is smelted three times through vacuum smelting to produce a silver plate with an oxygen content of less than 50ppm, and the vacuum degree of the smelting equipment during the vacuum smelting process is not less than 10 -2 Pa. The above-mentioned silver plates are processed into silver strips with a thickness of 0...

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Abstract

The invention discloses a silver / molybdenum / silver metal-based layered composite material and a preparation process. The composite material is of a three-layer layered structure and has total width of 25-95 mm and total thickness of 27-57 [mu]m, wherein a first layer and a third layer are both silver layers, and each of the first layer and the third layer has thickness of 6 [mu]m and oxygen content of lower than 50 ppm; and a second layer is a molybdenum layer which has thickness of 15-45 [mu]m. According to the preparation process, a different-temperature rolling compounding mode is adopted, and meanwhile, high-temperature diffusion at 900-950 DEG C is adopted. The composite material prepared by the invention belongs to a metallurgical bonding layered composite material, has excellent heat resistance, high-temperature mechanical property and stable expansion coefficient of molybdenum, gives full play to the conductivity and atmospheric corrosion resistance of silver, is greatly improved in reliability in high and low temperature impact application occasions in the field of electronic and electrical appliances, and thus greatly prolongs the service life of electronic components.

Description

technical field [0001] The invention relates to a metal-based composite material and a preparation process, in particular to a silver / molybdenum / silver metal-based composite material and a preparation process for high-low temperature impact applications in the field of electronic appliances. Background technique [0002] Pure silver foil is widely used in electronic and electrical products because of its good electrical conductivity and ability to resist air pollution. However, in some special electronic and electrical fields, drastic temperature changes will cause thermal shock, and pure silver is soft and has low strength, which is prone to fracture and failure. Molybdenum has excellent heat resistance, high temperature mechanical properties and stable expansion coefficient, so it has been introduced into related industries and has been applied. However, molybdenum has the characteristics of poor electrical conductivity and poor resistance to air pollution. In order to so...

Claims

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Application Information

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IPC IPC(8): B32B15/01C22F1/18C22F1/14B21B1/38
CPCB32B15/018C22F1/18C22F1/14B21B1/38B32B2250/40B32B2307/306B32B2307/202B32B2307/714B21B2001/386
Inventor 朱解祖
Owner 江苏欣恒蕴精密零件有限公司
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