Electron backscatter diffraction analysis of electroformed drug cover: The grains of the electroformed cover are ultrafine grains; the electroformed antirotational drug cover has columnar grains, and there is a clear preferred orientation; electroformed nonrotational type The cover is equiaxed with fine crystals and has no obvious orientation.
The equipment is not complicated, and the original village materials are also very familiar, so it is well known that it is extremely fine internally and externally. The anti-rotation performance of the medicine cover has an important relationship with the material processing method and organizational structure of the medicine cover, the most important of which is to understand the relationship between the organizational structure and the anti-rotation performance. 1 The shape and spatial distribution of the particles still lack a detailed understanding. The emergence of electron backscatter diffraction 830 technology provides an opportunity for this research. 14. For the characteristics of ultra-fine particles of electroformed drug-type masks, Di Guoqiang made an agreement on electroforming The analysis of the shape cover can make us understand the shape of the particles and provide a new basis for the explanation of the mechanism of the spin-breaking armor in the spatial distribution.It provides the possibility to establish the relationship between the organizational process energy 5.
1 Experimental analysis of sample preparation The electroforming process is a technique of electrodepositing a fixed thickness on the core mold. It is intended to come in. For example, the casting material is used as the anode, and the metal salt solution of the electroforming material is used for electricity. With the use of DC power, the original metal on the anode loses its core and becomes gold, and the ions enter the center of the casting liquid. The 1st electron obtains electrons on the cathode to become metal atoms and is deposited on the surface of the mother mold. When the whole process is stable When the electroformed layer reaches a predetermined degree, the electroforming is obtained with the opposite concave and convex shapes of the sub-mold.
The DC power controller meter obtained the anti-rotation medicine cover and the non-anti-rotation medicine cover by using the casting process of No. 1. For the pure copper medicine cover obtained by different electroforming processes, the interception of the middle section will be The sample is polished into electrolytic polishing. Of course; erosion 1 in the hall is the composition and use conditions of the electrolytic polishing solution.
Cast samples are divided into anti-rotation and old anti-rotation, species, metal electrolyte composition current density Adm2 treatment time s copper etchant name ammonium persulfate aqueous solution immersed in cold or hot reagent ferric chloride aqueous solution by immersion or tapping method step by step Scanning electron microscope photograph of the sample (observed by scanning electron microscope) of the etched 12 samples.
13 Electron backscatter diffraction 8. In the field of view selected by the scanning electron microscope, the crystal grains are scanned to obtain the diffraction poles and inverse poles of a series of crystal grains, and the direction cosine matrix of each diffraction crystal grain can be obtained. 54 is the pole of 00101 of the 178 grains scanned by the electroformed anti-rotation drug mask, 51 is the normal direction of the sample and the side of the bus is called the normal direction of the sample. The direction is â‘´ Antipolar.
2 Analysis and discussion of experimental results and anti-rotation obtained by different electroforming forming processes of the sample's normal circumferential direction 1; the 4-wire square 1 reverse pole and the sample normal circumferential magic and busbar direction D pole's reverse pole mountains The crystal morphology of the drug-type cover and the non-antirotatory drug Yeya is different. The antirotatory drug type cover is a columnar grain with a certain direction, which is related to the growth mode of the crystal, and the non-rotary drug type cover is an equiaxed fine grain, and there is no obvious directionality. This can be obtained by the diffraction pattern of 830 It is proved that the diffraction point of the sample has obvious segregation from the polar 001 pole and the normal reverse pole of the sample, while the reverse pole of the normal direction of the grain of the 51 force electroformable antirotation drug cover is obvious Segregation, but there is no obvious orientation on the reverse pole in the other direction. Therefore, it can be imagined that the grain grows at a fixed angle with the normal direction of the drug mask, which is not available in other processing methods, so it can be speculated that annealing and aging of this texture has little effect on its anti-rotation performance. And the growth method of the crystal should strengthen its anti-rotation armor breaking ability.
3 Conclusion 1 Different electroforming process can get anti-rotation drug cover and non-antirotation drug cover. From the photos of 3 touches, it can be seen that the electroforming drug cover is ultra-fine grain, the grain size is less than 3 but the electroforming antirotation drug There is a clear difference in the shape of the grain between the cover and the non-antirotatory drug-type cover. The anti-rotation drug cover is an equiaxed fine-grained puller 5 Hu Shilian without obvious orientation. Application of electron backscatter diffraction in the research of electroformed drug mask.
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