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Method for preparing aluminum/lead system laminar composite material metallic phase example and display organization

A composite material and sample technology, applied in the field of metallographic sample preparation, can solve the problems of low melting point, difficult to eliminate polishing marks, and relief, etc., and achieve the effect of simple preparation method, high definition and simple operation method

Inactive Publication Date: 2008-12-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) It is difficult to eliminate polishing track marks and easy to appear relief between the second phase particles;

Method used

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  • Method for preparing aluminum/lead system laminar composite material metallic phase example and display organization
  • Method for preparing aluminum/lead system laminar composite material metallic phase example and display organization
  • Method for preparing aluminum/lead system laminar composite material metallic phase example and display organization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 as figure 1 As shown, in the figure 1 is the aluminum bottom layer of 100×20×3mm, 2 is the lead surface layer of 100×20×3mm, and 3 is the transition metal layer tin layer of 100×20×1.Omm. The sample preparation goes through the following steps: A. Cutting and inlaying the sample: Use sharp-edged scissors to cut a sample of an appropriate size in cold water, dry it naturally in the air, file the cross-section with a fine plate, and use polytetrafluoroethylene The cylinder with a diameter of 25mm and a length of 15mm is used as a casing, and the high-grade general-purpose double-tube adhesive with short curing time and low heat release is used as a curing filler. When forming a sample, place it on a smooth flat plate and cure it naturally in the air for 8 hours.

[0026] B. Manual coarse grinding: the sample has been passed through 320 # 、600 # , 800 # Silicon carbide water sandpaper is manually polished, and continuous tap water is used as lubricant and cool...

Embodiment 2

[0030] The sample preparation step of embodiment 2 is basically the same as that of embodiment 1, and the difference is that the transition metal layer 3 is a bismuth layer, and the time for the sample to be solidified in the air in step A is 6 hours, and the rough polishing time in step D is 7 minutes. In step E, the working parameters of the frequency converter are 22Hz, 380V. Every 3 minutes of polishing, dip HNO with absorbent cotton 3 5ml+C 2 h 5 Wipe OH95ml erosion solution on the grinding surface for 15 seconds, dip HF (48%) 0.5ml+H with absorbent cotton 2 Wipe 095ml etching solution on the grinding surface for 10 seconds, other steps are the same as case 1, and the clarity of metallographic structure obtained is similar to case 1.

Embodiment 3

[0031] Example 3 The sample preparation steps are basically the same as in Example 1, except that the solidification time of the sample sample in the air is 7 hours in the step A, the rough polishing time in the step D is 10 minutes, and the frequency converter works in the step E The parameter is 20Hz, 380V, every polishing 3 minutes, dipped in HNO with absorbent cotton 3 5ml+C 2 h 5 Wipe OH95ml erosion solution on the grinding surface for 25 seconds, dip HF (48%) 0.5ml+H with absorbent cotton 2 Wipe 095ml etching solution on the grinding surface for 15 seconds, other steps are the same as case 1, and the clarity of metallographic structure obtained is similar to case 1.

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PUM

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Abstract

A method for preparing a metallography sample and a display tissue of a softer substrate aluminum / lead laminar composite is characterized by including the special working procedures of sample intercepting and besetting, manual kibbling, mechanical fine grinding, rough polishing, fine polishing, etc. The invention successfully prepares a sample which can be used for observing the metallography of the laminar composite of an aluminum-lead system as well as scanning the combining situation of the interface tissues of an electron microscope. The method of the invention has the advantages that the sample preparing method is simpler and more convenient and relates to a technology which can obtain a very clear and complete microscopic tissue.

Description

Technical field: [0001] The invention belongs to the technical field of metallographic sample preparation, and in particular provides a method for metallographic samples and display structures of softer aluminum / lead-based layered composite materials. Background technique: [0002] Compared with many other non-ferrous metals, aluminum (or aluminum alloy) and lead (or lead alloy) are metal (alloy) materials with low hardness and soft matrix, which brings great difficulties to the preparation of metallographic samples. These issues are mainly: [0003] 1. The main problems that are prone to occur in the traditional preparation of aluminum and aluminum alloy samples: [0004] (1) The deformation caused by cutting and grinding is relatively deep; [0005] (2) At a lower temperature, such as 180-250°C, the recovery and precipitation process will occur, and it is easy to rise to such a temperature during the sample preparation process; [0006] (3) It is difficult to eliminate ...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 竺培显周生刚黄子良孙勇王玉玺郭卫红徐家伟
Owner KUNMING UNIV OF SCI & TECH
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