CN113514465A - Display method of silver or silver alloy metallographic phase - Google Patents
Display method of silver or silver alloy metallographic phase Download PDFInfo
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- CN113514465A CN113514465A CN202110611340.8A CN202110611340A CN113514465A CN 113514465 A CN113514465 A CN 113514465A CN 202110611340 A CN202110611340 A CN 202110611340A CN 113514465 A CN113514465 A CN 113514465A
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Abstract
The invention discloses a display method of silver or silver alloy metallographic phase, comprising the following steps: providing a silver or silver alloy sample; sequentially polishing the surface of the silver or silver alloy sample to be detected by adopting first water-based abrasive paper, second water-based abrasive paper and third water-based abrasive paper to form a first polishing surface, wherein the granularity numbers of the first water-based abrasive paper, the second water-based abrasive paper and the third water-based abrasive paper are sequentially increased; mechanically polishing the first polishing surface to form a second polishing surface; and corroding the second polished surface by adopting a corrosive to form a metallographic display surface, wherein the corrosive comprises ammonia water and hydrogen peroxide. The display method of the silver or silver alloy metallographic phase is simple to operate and short in time consumption, can simply and efficiently corrode the grain boundary of the silver or silver alloy metallographic phase, is clear and attractive in metallographic structure, and is beneficial to research on silver and silver alloy target materials.
Description
Technical Field
The invention relates to a metal processing method, in particular to a display method of silver or silver alloy metallographic phase.
Background
The target material is usually a polycrystalline structure, and the grain size can be from micrometer to millimeter. The finer the crystal grain, the larger the grain boundary area and the greater the influence on the properties. For the same target material, the sputtering rate of the target with fine crystal grains is faster than that of the target with coarse crystal grains; the thickness distribution of the film sputtered and deposited by the target with smaller grain size difference (even distribution) is more even, and the silver alloy thereof have good conductivity and light reflectivity, so that the silver and the silver alloy are used for forming a plurality of thin layers of electrodes (electrodes) or reflecting layers (reflecting layers) and are even commonly applied to films for shielding electromagnetic waves; in electronic parts, semiconductor integrated circuits, optoelectronic parts, optical recording media, or electromagnetic wave shields, the thin films of the electrodes, reflective layers, and shielding layers are formed by sputtering.
In the metallographic research of silver and silver alloy, a corrosive agent composed of mixed liquid of nitric acid, hydrochloric acid, water and the like is usually adopted, and the corrosive agent is easy to form a layer of film on a silver and silver alloy metallographic sample, so that the blurring of the surface of an observed sample is difficult to remove, and the observation and the judgment of a metallographic structure are adversely affected, so that the inconvenience and the defect still exist on the existing metallographic display of the silver and silver alloy, and further improvement is needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for displaying the silver or silver alloy metallographic phase.
In order to achieve the purpose, the invention adopts the technical scheme that: a display method of silver or silver alloy metallographic phase comprises the following steps:
providing a silver or silver alloy sample;
sequentially polishing the surface of the silver or silver alloy sample to be detected by adopting first water-based abrasive paper, second water-based abrasive paper and third water-based abrasive paper to form a first polishing surface, wherein the granularity numbers of the first water-based abrasive paper, the second water-based abrasive paper and the third water-based abrasive paper are sequentially increased;
mechanically polishing the first polishing surface to form a second polishing surface;
and corroding the second polished surface by adopting a corrosive to form a metallographic display surface, wherein the corrosive comprises ammonia water and hydrogen peroxide.
In a preferred embodiment of the method for displaying a metallographic phase of silver or a silver alloy according to the present invention, the first aqueous sandpaper, the second aqueous sandpaper, and the third aqueous sandpaper are 320# aqueous sandpaper, 600# aqueous sandpaper, and 1000# aqueous sandpaper, respectively. When the water-based abrasive paper is used for polishing, the abrasive paper is rotated on a grinding disc coated with a polishing agent, the grinding disc is rotated while water is added to grind the polished surface of the sample, the polished surface of the sample is lightly pressed on the water-based abrasive paper, the water-based abrasive paper moves along the radial direction and slightly rotates opposite to the rotation direction of the grinding disc, and the water-based abrasive paper is obtained after the coarse grinding marks completely disappear and the fine grinding marks are consistent.
As a preferred embodiment of the method for displaying the metallographic phase of silver or silver alloy, the method further comprises the steps of scribing the silver or silver alloy sample to be detected before the surface of the silver or silver alloy sample to be detected is polished by sequentially using the first water-based sand paper, the second water-based sand paper and the third water-based sand paper, and then performing water cutting.
As a preferred embodiment of the method for displaying the silver or silver alloy metallographic phase, the rotating speed of the first water-based sand paper is 350-400 r/min, and the grinding time is 10-15 min. The first water-based sand paper is preferably used for grinding the surface to be ground of the sample with the depth of 1-2 mm. If the surface to be sanded has deep cracks, it is preferably sanded with 100-mesh sandpaper before the first aqueous sandpaper until the deep cracks disappear.
As a preferred embodiment of the method for displaying the silver or silver alloy metallographic phase, the rotation speed of the second water-based sand paper is 350-400 r/min, and the grinding time is 5-8 min. The second aqueous sandpaper was sanded to surface level without the previous scratch under the above conditions.
As a preferred embodiment of the method for displaying the silver or silver alloy metallographic phase, the rotating speed of the third water-based sand paper is 350-400 r/min, and the grinding time is 8-10 min. And grinding the third water-based abrasive paper under the conditions until the surface is smooth and no upper scratch exists.
As a preferable embodiment of the method for displaying the metallographic phase of silver or a silver alloy, the polishing direction of the first aqueous sandpaper is perpendicular to that of the second aqueous sandpaper; the grinding direction of the second water-based abrasive paper is perpendicular to that of the third water-based abrasive paper. Namely, after the first water-based abrasive paper is polished, the sample is rotated by 90 degrees and then polished by the second water-based abrasive paper, and after the second water-based abrasive paper is polished, the sample is rotated by 90 degrees and then polished by the third water-based abrasive paper.
As a preferable embodiment of the method for displaying the metallographic phase of silver or a silver alloy according to the present invention, the mechanical polishing is performed by using a diamond polishing agent of W0.5 to W1.0.
As a preferred embodiment of the display method of the silver or silver alloy metallographic phase, the rotation speed of the mechanical polishing is 300-350 r/min, and the polishing time is 3-5 min. The mechanical polishing adopts W0.5 diamond polishing agent under the conditions, and the polished surface is bright and presents an obvious mirror surface. And after the mechanical polishing is finished, the step of cleaning the polished sample is also included.
The corrosive agent as a preferred embodiment of the display method of the silver or silver alloy metallographic phase comprises the following components in percentage by weight: 12.5 percent of ammonia water, 0.5 percent of hydrogen peroxide and 87 percent of water. In a preferred embodiment of the method for displaying a metallographic phase of silver or a silver alloy according to the present invention, the etching time is 50 to 150 seconds. As a preferable embodiment of the method for displaying the metallographic phase of silver or a silver alloy according to the present invention, the etching is immersion etching. Preferably, the method further comprises a step of washing the sample with pure water after the etching is finished.
The invention has the beneficial effects that: the invention provides a display method of silver or silver alloy metallographic phase. The display method of the silver or silver alloy metallographic phase is simple to operate and short in time consumption, can simply and efficiently corrode the grain boundary of the silver or silver alloy metallographic phase, is clear and attractive in metallographic structure, and is beneficial to research on silver and silver alloy target materials.
Drawings
FIG. 1 is a photomicrograph of the metallographic phase of the AgPdCu alloy of example 1;
FIG. 2 is a photomicrograph of the metallographic phase of the AgPdIn alloy of example 2 showing the surface.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The embodiment is a method for displaying a metallographic phase of an AgPdCu alloy, which comprises the following steps:
providing an AgPdCu alloy sample: preparing an AgPdCu alloy sample with the specification of 15mm by 15mm and the thickness of 10mm by using wire cutting equipment;
and (3) sequentially polishing the surface of the silver or silver alloy sample to be tested by using 320# water-based sand paper, 600# water-based sand paper and 1000# water-based sand paper to form a first polishing surface: grinding with 320# water-based sand paper until the surface of the sample is flat and consistent in grinding trace, wherein the grinding speed is 400r/min, the grinding time of each grinding surface is 15min, and the cooling liquid is water; then grinding the sample by using No. 600 water-based abrasive paper along a direction vertical to a grinding mark generated by grinding of No. 320 water-based abrasive paper until the surface of the sample is flat and the last grinding mark cannot be seen, wherein the grinding speed is 300r/min, the grinding time of each grinding surface is 8min, and the cooling liquid is water; then, grinding the sample by using No. 1000 aqueous sand paper along a direction vertical to a grinding trace generated by grinding of No. 600 aqueous sand paper until the surface of the sample is flat and no last grinding trace is seen, wherein the grinding speed is 400r/min, the grinding time of each surface is 10min, and the cooling liquid is water;
mechanically polishing the first polishing surface to form a second polishing surface: mechanically polishing by adopting a W1 diamond polishing agent until the surface is bright and presents an obvious mirror surface, wherein the rotating speed in the polishing process is 300r/min, each surface is polished for 5min, then cleaning the polished sample by using a cleaning agent, and wiping water stains;
corroding the second polished surface by using a corrosive to form a metallographic display surface, wherein the corrosive comprises ammonia water and hydrogen peroxide, and the corrosive comprises the following components in percentage by weight: 12.5 percent of ammonia water, 0.5 percent of hydrogen peroxide and 87 percent of water, soaking and corroding for 60s, washing the steel plate by pure water after the corrosion is finished, wiping water stains by a paper towel, observing the steel plate on a metallographic microscope, and obtaining an image shown in figure 1. As can be seen from figure 1, the AgPdCu alloy metallographic phase is manufactured by the method, and obvious grain boundary and grain size can be observed on a metallographic microscope.
Example 2
The embodiment is a method for displaying a metallographic phase of an AgPdIn alloy, which comprises the following steps:
providing an AgPdIn alloy sample: preparing an AgPdIn alloy sample with the specification of 15mm x 15mm and the thickness of 10mm by using a wire cutting device;
and (3) sequentially polishing the surface of the silver or silver alloy sample to be tested by using 320# water-based sand paper, 600# water-based sand paper and 1000# water-based sand paper to form a first polishing surface: grinding with 320# water-based sand paper until the surface of the sample is flat and consistent in grinding trace, wherein the grinding speed is 400r/min, the grinding time of each grinding surface is 10min, and the cooling liquid is water; then grinding the sample by using No. 600 water-based abrasive paper along a direction vertical to a grinding mark generated by grinding of No. 320 water-based abrasive paper until the surface of the sample is flat and the last grinding mark cannot be seen, wherein the grinding speed is 300r/min, the grinding time of each grinding surface is 5min, and the cooling liquid is water; then, grinding the sample by using No. 1000 aqueous sand paper along a direction vertical to a grinding trace generated by grinding of No. 600 aqueous sand paper until the surface of the sample is flat and no last grinding trace is seen, wherein the grinding speed is 400r/min, the grinding time of each surface is 8min, and the cooling liquid is water;
mechanically polishing the first polishing surface to form a second polishing surface: mechanically polishing by adopting a W0.5 diamond polishing agent until the surface is bright and presents an obvious mirror surface, wherein the rotating speed in the polishing process is 300r/min, each surface is polished for 5min, then cleaning the polished sample by using a cleaning agent, and wiping water stains;
corroding the second polished surface by adopting a corrosive to form a metallographic display surface, wherein the corrosive comprises ammonia water and hydrogen peroxide, and the corrosive comprises the following components in percentage by weight: 12.5 percent of ammonia water, 0.5 percent of hydrogen peroxide and 87 percent of water, soaking and corroding for 120s, washing the steel plate by pure water after the corrosion is finished, wiping water stains by a paper towel, observing the steel plate on a metallographic microscope, and taking an image as shown in figure 2. As can be seen from FIG. 2, the AgPdIn alloy metallographic phase prepared by the method can be observed on a metallographic microscope to have obvious grain boundaries and grain sizes.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A display method of silver or silver alloy metallographic phase is characterized by comprising the following steps:
providing a silver or silver alloy sample;
sequentially polishing the surface of the silver or silver alloy sample to be detected by adopting first water-based abrasive paper, second water-based abrasive paper and third water-based abrasive paper to form a first polishing surface, wherein the granularity numbers of the first water-based abrasive paper, the second water-based abrasive paper and the third water-based abrasive paper are sequentially increased;
mechanically polishing the first polishing surface to form a second polishing surface;
and corroding the second polished surface by adopting a corrosive to form a metallographic display surface, wherein the corrosive comprises ammonia water and hydrogen peroxide.
2. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein the first aqueous sandpaper, the second aqueous sandpaper and the third aqueous sandpaper are 320# aqueous sandpaper, 600# aqueous sandpaper and 1000# aqueous sandpaper, respectively.
3. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein the rotational speed of the first aqueous sand paper is 350 to 400r/min, and the polishing time is 10 to 15 min.
4. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein the rotation speed of the second aqueous sand paper is 350 to 400r/min, and the grinding time is 5 to 8 min.
5. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein the rotational speed of the third aqueous sand paper is 350 to 400r/min, and the polishing time is 8 to 10 min.
6. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein the polishing direction of the first aqueous abrasive paper is perpendicular to the polishing direction of the second aqueous abrasive paper; the grinding direction of the second water-based abrasive paper is perpendicular to that of the third water-based abrasive paper.
7. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein said mechanical polishing is carried out by using a diamond polishing agent W0.5 to W1.0.
8. A method for displaying a metallographic phase of silver or a silver alloy according to claim 7, wherein said mechanical polishing is performed at a rotation speed of 300 to 350r/min for a period of 3 to 5 min.
9. The method for displaying the metallographic phase of silver or a silver alloy according to claim 1, wherein said etching agent comprises the following components in percentage by weight: 12.5 percent of ammonia water, 0.5 percent of hydrogen peroxide and 87 percent of water.
10. A method of displaying a metallurgical phase of silver or a silver alloy according to claim 9, wherein said etching is carried out for a period of time of 50 to 150 seconds.
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| CN202110611340.8A CN113514465A (en) | 2021-06-01 | 2021-06-01 | Display method of silver or silver alloy metallographic phase |
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| CN202110611340.8A CN113514465A (en) | 2021-06-01 | 2021-06-01 | Display method of silver or silver alloy metallographic phase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670236A (en) * | 2021-10-21 | 2021-11-19 | 广东奥迪威传感科技股份有限公司 | Thickness detection method of silver-tin interface metal eutectic layer |
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| CN100999792A (en) * | 2006-09-20 | 2007-07-18 | 番禺职业技术学院 | Anti discolour silver alloy |
| CN111537318A (en) * | 2020-03-31 | 2020-08-14 | 先导薄膜材料（广东）有限公司 | Metallographic phase display method of copper-gallium alloy |
| CN112857932A (en) * | 2021-01-12 | 2021-05-28 | 昆明理工大学 | Preparation method of metallographic sample of silver-gallium diffusion alloy |
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2021
- 2021-06-01 CN CN202110611340.8A patent/CN113514465A/en active Pending
Patent Citations (3)
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| CN100999792A (en) * | 2006-09-20 | 2007-07-18 | 番禺职业技术学院 | Anti discolour silver alloy |
| CN111537318A (en) * | 2020-03-31 | 2020-08-14 | 先导薄膜材料（广东）有限公司 | Metallographic phase display method of copper-gallium alloy |
| CN112857932A (en) * | 2021-01-12 | 2021-05-28 | 昆明理工大学 | Preparation method of metallographic sample of silver-gallium diffusion alloy |
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| 张兴维: "银-铜复合材料的金相观察", 稀有金属 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113670236A (en) * | 2021-10-21 | 2021-11-19 | 广东奥迪威传感科技股份有限公司 | Thickness detection method of silver-tin interface metal eutectic layer |
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