Method for manually polishing blocky metal transmission electron microscope sample

Abstract

The invention provides a method for manually polishing a blocky metal transmission electron microscope sample. The method specifically comprises the following steps: (1) mechanically cutting the metal transmission electron microscope sample; (2) cutting the abrasive paper with the gum, and adhering and fixing the sample on the gum of the abrasive paper; (3) manufacturing a magnetic wood block: sawing to obtain a wood block with a smooth surface, forming a groove in the upper surface of the wood block, and adding magnetic resin into the groove; (4) the rough surface of the abrasive paper bonded with the sample is placed on the upper surface of a magnetic wood block, the sample is fixed through the magnetic effect generated between the sample and magnetic resin on the magnetic wood block, and grinding is conducted; (5) taking down the sample, and measuring the thickness; (6) the ground side surface of the sample is pasted to gum of abrasive paper to be ground; and (7) taking down the sample, and measuring the thickness. The fixing device solves the fixing problem in the manual polishing process of the blocky metal sample.

Description

Technical Field

[0001] The invention relates to the technical field of metallographic detection, and in particular to a method for manually polishing a bulk metal transmission electron microscope sample. Background Art

[0002] At present, the preparation process of transmission electron microscope samples of bulk metal materials mainly includes mechanical cutting-manual polishing-punching-pre-thinning-final thinning, that is, cutting the samples into thin slices with a thickness of about 200um, and then manually grinding them into thin slices of 40-100um, and then performing subsequent punching and fine thinning. However, thin slices with lower thickness are not convenient to grind directly during the manual grinding process. The thin slices need to be fixed on an object that is easy to operate and manually ground. Currently, commonly used fixing methods include 502 glue, hot melt glue, etc., but they all require long-term immersion of the detached samples in acetone solution. This type of method is complicated and time-consuming. The use of volatile acetone solution is not conducive to the realization of laboratory energy conservation and emission reduction goals. Summary of the invention

[0003] In view of the above-mentioned technical problem of inconvenient fixation in the existing method for grinding metal material transmission electron microscope samples, a method for manually grinding block metal transmission electron microscope samples is provided, in which the sample is fixed with sandpaper with adhesive on the back, and then the sandpaper is pressed with a magnetic wooden block for grinding. This method can realize the simultaneous grinding of two or more samples, which is convenient for the removal of samples and subsequent measurement. The operation is simple and convenient, which greatly shortens the manual grinding time and improves the test efficiency. At the same time, it reduces the use of consumables and reduces environmental pollution.

[0004] The technical means adopted by the present invention are as follows:

[0005] A method for manually polishing a bulk metal transmission electron microscope sample comprises the following steps:

[0006] (1) Mechanically cut metal TEM samples according to preset dimensions;

[0007] (2) cutting sandpaper with adhesive backing, and bonding and fixing the metal transmission electron microscope sample obtained in step (1) on the adhesive backing of the cut sandpaper;

[0008] (3) Preparation of magnetic wood block: sawing to obtain a smooth wood block, opening a groove on the upper surface of the wood block, polishing the inner surface of the groove and applying a layer of water-based varnish, adding magnetic resin into the groove after drying, and trimming the upper surface of the magnetic resin to be flush with the upper end surface of the wood block after the magnetic resin is allowed to stand and solidify in the groove, so that the magnetic resin and the wood block form a magnetic wood block with a smooth upper surface;

[0009] (4) placing the rough surface of the sandpaper with the metal TEM sample bonded thereto on the upper surface of the magnetic wooden block, so that the metal TEM sample is fixed by the magnetic effect generated between the metal TEM sample and the magnetic resin on the magnetic wooden block; using water as a lubricant, sandpapers of different particle sizes are used in turn to grind the surface of the metal TEM sample, so that the surface of the metal TEM sample is smooth and bright;

[0010] (5) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding;

[0011] (6) Paste one side of the metal TEM sample after grinding onto the adhesive backing of sandpaper, use water as a lubricant, and use sandpaper of different particle sizes to grind the surface of the metal TEM sample in turn to make the surface of the metal TEM sample smooth and bright;

[0012] (7) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding;

[0013] (8) If the thickness of the metal TEM sample measured in step (7) reaches the specified size, the grinding is terminated; otherwise, steps (4) to (7) are repeated to continue grinding until the thickness of the metal TEM sample reaches the specified size.

[0014] Furthermore, the size of the metal transmission electron microscope sample obtained by mechanical cutting in step (1) is: 8 to 10 mm in length, 8 to 10 mm in width, and 0.10 to 0.25 mm in thickness.

[0015] Furthermore, the size of the sandpaper cut in step (2) is: 20-25 mm in length and 10-25 mm in width.

[0016] Furthermore, the size of the sandpaper cut in step (2) can be determined according to the size of the metal TEM sample obtained by mechanical cutting, so as to ensure that at least two metal TEM samples can be bonded to the sandpaper at the same time.

[0017] Furthermore, the particle size of the sandpaper cut in step (2) is 800# to 1200#.

[0018] Furthermore, in step (3), the size of the wood block obtained by sawing is: the length and width are both 25-30 mm, and the thickness h is 20-30 mm; the depth h1 of the groove is 5 mm, and the wall thickness d is 3-5 mm; the production process of the magnetic resin is: first, 50 ml of a mixed solution is prepared by using epoxy resin and ethylenediamine in a ratio of 4:1, and then 1-3 g of 150-250 mesh ferrite magnetic powder is added and stirred to form a magnetic resin.

[0019] Furthermore, during the grinding process of step (4) and step (6), the surface of the metal transmission electron microscope sample is ground using 180#, 320#, 500#, 800#, 1200#, and 2000# sandpapers in sequence.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The method for manually polishing a block-shaped metal transmission electron microscope sample provided by the present invention adopts sandpaper with adhesive backing to fix the sample, and then adopts a magnetic wooden block to press the sandpaper for polishing. The method can realize the simultaneous polishing of two or more samples, and is convenient for the removal of samples and subsequent measurement. The operation is simple and convenient, and the manual polishing time is greatly shortened, and the test efficiency is improved. At the same time, the use of consumables is reduced, and environmental pollution is reduced.

[0022] Based on the above reasons, the present invention can be widely promoted in the field of metallographic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of the magnetic wood block of the present invention.

[0025] Figure 2 This is a schematic diagram of the top view structure of the magnetic wood block of the present invention.

[0026] In the figure: 1. Magnetic resin layer; 2. Varnish layer; 3. Wooden block. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-2 As shown, the present invention provides a method for manually polishing a bulk metal transmission electron microscope sample, which specifically comprises the following steps:

[0029] (1) Mechanically cut metal TEM samples according to preset dimensions;

[0030] (2) cutting sandpaper with adhesive backing, and bonding and fixing the metal transmission electron microscope sample obtained in step (1) on the adhesive backing of the cut sandpaper;

[0031] (3) Production of magnetic wood block: sawing to obtain a smooth wood block, opening a groove on the upper surface of the wood block, polishing the inner surface of the groove and applying a layer of water-based varnish, adding magnetic resin into the groove after drying, and trimming the upper surface of the magnetic resin to be flush with the upper end surface of the wood block after the magnetic resin is left to solidify in the groove, so that the magnetic resin and the wood block form a magnetic wood block with a smooth upper surface; Figure 1 As shown, the obtained magnetic wood block comprises a magnetic resin layer 1, a varnish layer 2 and a wood block 3 in sequence;

[0032] (4) placing the rough surface of the sandpaper with the metal TEM sample bonded thereto on the upper surface of the magnetic wooden block, so that the metal TEM sample is fixed by the magnetic effect generated between the metal TEM sample and the magnetic resin on the magnetic wooden block; using water as a lubricant, sandpapers of different particle sizes are used in turn to grind the surface of the metal TEM sample, so that the surface of the metal TEM sample is smooth and bright;

[0033] (5) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding;

[0034] (6) Paste one side of the metal TEM sample after grinding onto the adhesive backing of sandpaper, use water as a lubricant, and use sandpaper of different particle sizes to grind the surface of the metal TEM sample in turn to make the surface of the metal TEM sample smooth and bright;

[0035] (7) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding;

[0036] (8) If the thickness of the metal TEM sample measured in step (7) reaches the specified size, the grinding is terminated; otherwise, steps (4) to (7) are repeated to continue grinding until the thickness of the metal TEM sample reaches the specified size.

[0037] Furthermore, the size of the metal TEM sample obtained by mechanical cutting in step (1) is: 8 to 10 mm in length, 8 to 10 mm in width, and 0.10 to 0.25 mm in thickness, which is convenient for subsequent punching into a specified size.

[0038] Furthermore, the size of the sandpaper cut in step (2) is: 20-25 mm in length and 10-25 mm in width.

[0039] Furthermore, the size of the sandpaper cut in step (2) can be determined according to the size of the metal TEM sample obtained by mechanical cutting, so as to ensure that at least two metal TEM samples can be bonded to the sandpaper at the same time.

[0040] Furthermore, the particle size of the sandpaper cut in step (2) is 800# to 1200#, and a certain surface roughness can ensure good contact between the sandpaper frosted surface and the magnetic wood block and is not easy to fall off.

[0041] Furthermore, in step (3), the size of the wood block obtained by sawing is: the length and width are both 25-30 mm, and the thickness h is 20-30 mm; the depth h1 of the groove is 5 mm, and the wall thickness d is 3-5 mm; the production process of the magnetic resin is: first, 50 ml of a mixed solution is prepared by using epoxy resin and ethylenediamine in a ratio of 4:1, and then 1-3 g of 150-250 mesh ferrite magnetic powder is added and stirred to form a magnetic resin.

[0042] Furthermore, during the grinding process of step (4) and step (6), the surface of the metal transmission electron microscope sample is ground using 180#, 320#, 500#, 800#, 1200#, and 2000# sandpapers in sequence.

[0043] The method for manually polishing a block-shaped metal transmission electron microscope sample provided by the present invention adopts sandpaper with adhesive backing to fix the sample, and then adopts a magnetic wooden block to press the sandpaper for polishing. The method can realize the simultaneous polishing of two or more samples, and is convenient for the removal of samples and subsequent measurement. The operation is simple and convenient, and the manual polishing time is greatly shortened, and the test efficiency is improved. At the same time, the use of consumables is reduced, and environmental pollution is reduced.

[0044] Example 1

[0045] The method for manually polishing a bulk metal transmission electron microscope sample used in this embodiment specifically includes the following steps:

[0046] (1) Mechanically cut 4 metal TEM samples according to preset dimensions; the dimensions of the metal TEM samples are: 10 mm in length, 10 mm in width, and 0.2 mm in thickness;

[0047] (2) Cutting sandpaper with adhesive backing to a size of 24 mm in length and 24 mm in width; bonding all four metal transmission electron microscope samples obtained in step (1) to the adhesive backing of the cut sandpaper;

[0048] (3) Preparation of magnetic wood block: sawing to obtain a smooth wood block, opening a groove on the upper surface of the wood block, polishing the inner surface of the groove and applying a layer of water-based varnish, adding magnetic resin into the groove after drying, and trimming the upper surface of the magnetic resin to be flush with the upper end surface of the wood block after the magnetic resin is allowed to stand and solidify in the groove, so that the magnetic resin and the wood block form a magnetic wood block with a smooth upper surface; the size of the wood block obtained by sawing is: length and width are both 25 to 30 mm, thickness h is 20 to 30 mm; the depth h1 of the groove is 5 mm, and the wall thickness d is 3 to 5 mm; the preparation process of the magnetic resin is: first, epoxy resin and ethylenediamine are used to prepare 50 ml of a mixed solution in a ratio of 4:1, and then 1 to 3 g of 150 to 250 mesh ferrite magnetic powder is added and stirred to form a magnetic resin;

[0049] (4) placing the rough surface of the sandpaper with four metal TEM samples bonded thereto on the upper surface of the magnetic wooden block, so that the metal TEM samples are fixed by the magnetic interaction between the metal TEM samples and the magnetic resin on the magnetic wooden block; using water as a lubricant, sandpapers with grits of 180#, 320#, 500#, 800#, 1200#, and 2000# are used to grind the surface of the metal TEM samples in turn, so that the surface of the metal TEM samples is smooth and bright;

[0050] (5) The metal TEM sample was removed and the thickness of the metal TEM sample after grinding was measured to be 0.12 mm;

[0051] (6) Paste one side of the metal TEM sample after grinding onto the adhesive backing of sandpaper, use water as a lubricant, and use sandpaper of different particle sizes to grind the surface of the metal TEM sample in turn to make the surface of the metal TEM sample smooth and bright;

[0052] (7) The metal TEM sample is removed and the thickness of the metal TEM sample after grinding is measured to be 0.07. When the thickness reaches the specified size, the grinding is terminated.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manually polishing bulk metal transmission electron microscope samples, characterized in that: The specific steps include: (1) Mechanically cut metal TEM samples according to preset dimensions; (2) cutting sandpaper with adhesive backing, and bonding and fixing the metal TEM sample obtained in step (1) on the adhesive backing of the cut sandpaper; (3) Preparation of magnetic wood block: sawing to obtain a smooth wood block, opening a groove on the upper surface of the wood block, polishing the inner surface of the groove and applying a layer of water-based varnish, adding magnetic resin into the groove after drying, and trimming the upper surface of the magnetic resin to be flush with the upper end surface of the wood block after the magnetic resin is allowed to stand and solidify in the groove, so that the magnetic resin and the wood block form a magnetic wood block with a smooth upper surface; (4) placing the rough surface of the sandpaper with the metal TEM sample bonded thereto on the upper surface of the magnetic wooden block, so that the metal TEM sample is fixed by the magnetic effect generated between the metal TEM sample and the magnetic resin on the magnetic wooden block; using water as a lubricant, sandpapers of different particle sizes are used in turn to grind the surface of the metal TEM sample, so that the surface of the metal TEM sample is smooth and bright; (5) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding; (6) Paste one side of the metal TEM sample after grinding onto the adhesive backing of sandpaper, use water as a lubricant, and use sandpaper of different particle sizes to grind the surface of the metal TEM sample in turn to make the surface of the metal TEM sample smooth and bright; (7) removing the metal TEM sample and measuring the thickness of the metal TEM sample after grinding; (8) If the thickness of the metal TEM sample measured in step (7) reaches the specified size, the grinding is terminated; otherwise, steps (4) to (7) are repeated to continue grinding until the thickness of the metal TEM sample reaches the specified size.

2. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: The size of the metal TEM sample obtained by mechanical cutting in step (1) is: 8 to 10 mm in length, 8 to 10 mm in width, and 0.10 to 0.25 mm in thickness.

3. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: The size of the sandpaper cut in step (2) is: 20-25 mm in length and 10-25 mm in width.

4. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: The size of the sandpaper cut in step (2) can be determined according to the size of the metal TEM sample obtained by mechanical cutting, so as to ensure that at least two metal TEM samples can be bonded to the sandpaper at the same time.

5. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: The particle size of the sandpaper cut in step (2) is 800# to 1200#.

6. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: In step (3), the size of the wood block obtained by sawing is: the length and width are both 25-30 mm, and the thickness h is 20-30 mm; the depth h1 of the groove is 5 mm, and the wall thickness d is 3-5 mm; the preparation process of the magnetic resin is: first, 50 ml of a mixed solution is prepared by using epoxy resin and ethylenediamine in a ratio of 4:1, and then 1-3 g of 150-250 mesh ferrite powder is added and stirred to form a magnetic resin.

7. The method for manually polishing bulk metal transmission electron microscope samples according to claim 1, characterized in that: During the grinding process of step (4) and step (6), the surface of the metal transmission electron microscope sample is ground using 180#, 320#, 500#, 800#, 1200#, and 2000# sandpapers in sequence.

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