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Testing method for internal oxidization at differential pressure of Ag-Sn-In alloy

A test method and internal oxidation technology, which is applied in the direction of testing the hardness of materials, measuring devices, and using the measurement of secondary emissions for material analysis, etc. It can solve problems affecting material processing, temperature rise, and large contact resistance.

Inactive Publication Date: 2017-08-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] AgSnO currently developed at home and abroad 2 The contact resistance is large and the temperature rise is high, which affects the electrical performance; at the same time, the high hardness SnO 2 Subsequent processing of the affected material

Method used

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  • Testing method for internal oxidization at differential pressure of Ag-Sn-In alloy
  • Testing method for internal oxidization at differential pressure of Ag-Sn-In alloy
  • Testing method for internal oxidization at differential pressure of Ag-Sn-In alloy

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Embodiment Construction

[0017] The test method provided by the present invention will be described in detail below.

[0018] Step 1) Use RG-8-8 industrial heat treatment resistance furnace to conduct high-temperature internal oxidation experiments on Ag-6.0Sn-2.8In alloy wire particles (φ1.8×6mm). The temperature in the furnace is set to 750 ° C, and the oxidation pressure is set to Atmospheric pressure, 0.3MPa, 1.5MPa.

[0019] Step 2) After oxidizing the Ag-6.0Sn-2.8In alloy wire particles in step 1) for 48 hours, cool to room temperature with the furnace;

[0020] Step 3) Observing the internal structure of the sample with a metallographic microscope (OM, Olympus GX-FSL, Japan);

[0021] Step 4) Use a scanning electron microscope (SEM, JSM-6510A, Japan) to observe the cross-sectional morphology of the alloy after oxidation, and use the built-in EDS for energy spectrum analysis;

[0022] Step 5) Use HSX-100TAY microhardness tester for hardness test;

[0023] Step 6) Obtain the microstructure and...

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Abstract

The invention discloses a testing method for internal oxidization at differential pressure of an Ag-Sn-In alloy. The method comprises the following steps of: performing a high-temperature internal oxidation experiment on Ag-6.0Sn-2.8In alloy wire particles by using an industrial heat treatment resistance furnace, wherein the diameter of the alloy wire particles is 1.8mm and the length is 6mm, the temperature in the furnace is set at 750 DEG C, and the oxidizing pressures are separately set at a constant pressure, 0.3MPa and 1.5MPa; after oxidization in 48 hours, performing furnace cooling to room temperature; observing internal tissues of a sample by means of a metalloscope; observing the section morphology of the alloy after internal oxidization by means of a scanning electron microscope, and performing energy spectrum analysis by means of an EDS; testing hardness by means of a microhardness tester; and acquiring silver stannic oxide prepared under different differential pressure conditions, wherein the silver stannic oxide has microstructures and mechanical properties. Ag-SnO2-In2O3 is prepared by means of a high-temperature internal oxidization process, and the silver stannic oxide prepared under different differential pressure conditions has different microstructures and mechanical properties.

Description

technical field [0001] The invention belongs to the field of electrical contact materials, and in particular relates to an Ag-6.0Sn-2.8In alloy differential pressure internal oxidation test method. Background technique [0002] Among the electrical contact materials, pure silver has the best electrical conductivity, but its cost is high, its hardness is low, it is not easy to process, and it is easy to weld. Silver metal oxide electrical contact materials have excellent switching characteristics, good electrical wear resistance, welding resistance, good machinability and electrical conductivity, and are widely used in the electrical and electronic industry, among which the best performance is AgCdO, once known as the "universal contact", is widely used in a variety of low-voltage electrical appliances ranging from several volts to thousands of volts, but the "Cd poison" produced by AgCdO during its manufacture and use is harmful to the human body and the environment. Studie...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N23/22G01N3/40
CPCG01N21/84G01N3/40G01N23/22
Inventor 楼白杨杜敬平
Owner ZHEJIANG UNIV OF TECH
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