Electric-spark alloying of VT22 alloy by chromium and tungsten electrode materials

Paustovs'kyi, O. V.; Novikova, V. I.; Tymofeeva, I. I.; Molyar, O. H.; Hubin, Yu. V.; Mordovets, N. M.; Isaeva, L. P.; Костенко, А. Д.

doi:10.1007/s11003-011-9377-6

Cited by 4 publications

(6 citation statements)

References 2 publications

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“…The indicator of the degree of coating was also calculated using the pycnometric-additive method proposed in [28], that is, using exclusively the extrapolation-affinity 3D model of the grain. The average grain volume of the initial and modified grinding powders in this case turned out to be equal to 71250000 µm 3 and 75085000 µm 3 , respectively. If we compare these values of the average grain volume of the initial and modified grinding powders with the values given in the table (the combined use of both the actual 3D shape of the grain and its extrapolation-affinity 3D model), then they are, respectively, in 1.13 (by 11.59 %) and 1.1 (8.77%) times higher.…”

Section: Experimental and Resultsmentioning

confidence: 84%

“…Heating was continued, grinding the mixture in a cup with a porcelain pestle, until drying and obtaining granules. The density of boron oxide was assumed equal to ρм = 1.85 g/cm 3 , sodium silicate -ρм = 2.61 g/cm 3 , titanium carbide -ρм = 3.21 g/cm 3 , diamond -ρd = 3.51 g/cm 3 .…”

Section: Experimental and Resultsmentioning

confidence: 99%

“…where Vс, Vsd are the average values of the volumes of the sanding powder grain after applying a coating to the surface of its grain and without coating, respectively, µm 3 ; ρс, ρsddensity of coating material and SHM grain, respectively, g/cm 3 . The volumes Vс, Vsd can be calculated based on the results of modern automated diagnostics (for example, using the DiaInspect.OSM device [32]) of the morphometric characteristics of the initial and modified grinding powders and based on the adopted 3D grain model.…”

Section: µ =mentioning

confidence: 99%

“…They emphasize (state) that the coating is an effective means of influencing the operational properties of products intended for use in mechanical engineering, in chemical and other industries, in the mining industry, and in abrasive tools. Among the main tasks of such influence is the protection of working surfaces from the action of external aggressive environments, mainly from corrosion [1][2][3][4], increasing the working life and reliability of parts of machines, devices and abrasive tools, [5][6][7], ensuring effective storage conditions and ease of use of medical products [8]. In the field of abrasive powders, which is the subject of this publication, coating is one of the effective methods of surface modification of grains of synthetic diamond (SD), cubic boron nitride, and powders of other superhard materials (SHM) [7,[9][10][11][12].…”

Section: Introduction *mentioning

confidence: 99%

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Pycnometric-Additive Determining of the Degree of Coating of High-Strength Synthetic Diamond Grinding Powders using the Actual 3D Morphology of their Grains

Petasyuk,

Bochechka,

Lavrinenko

et al. 2023

J. Coat. Sci. Technol.

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The methodological components of direct and indirect analytical determining of the degree of coating of synthetic diamond grinding powders are analyzed. It has been established that the weight method most used in practice for determining this technological property of grinding powder is not universal for different methods of applying the coating. More universal in this regard, as the review of publications showed, is the well-known indirect-analytical method based on the pycnometric-additive approach. An improved variant of this method is proposed, aimed at application to high-strength synthetic diamond grinding powders. The method takes into account the peculiarities of the 3D morphology of the grains of such powders. Using the example of grinding powder AC300 500/400, the grains of which were coated with a solution of a mixture of boron oxide, sodium silicate, and titanium carbide, the advantages of using the proposed method are illustrated. The results of a comparison of determining the degree of coating by a known method and its improved variant are presented.

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Section: Experimental and Resultsmentioning

confidence: 84%

Section: Experimental and Resultsmentioning

confidence: 99%

Section: µ =mentioning

confidence: 99%

Section: Introduction *mentioning

confidence: 99%

See 2 more Smart Citations

Pycnometric-Additive Determining of the Degree of Coating of High-Strength Synthetic Diamond Grinding Powders using the Actual 3D Morphology of their Grains

Petasyuk,

Bochechka,

Lavrinenko

et al. 2023

J. Coat. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The coating is also acting (effective) means of influencing the operational and technological properties of products intended for use in mechanical engineering, chemical, and other industries. Among the main tasks of such influence is the protection of work surfaces from the action of aggressive outer environments, mainly from corrosion [5][6][7] and increasing the working life of machine parts [8,9].…”

Section: Introduction *mentioning

confidence: 99%

Determining the Thickness Coating of Grinding Powders of Synthetic Diamond Based on a Specific-Surface Approach and using an Extrapolation-Affine 3D Model of Grain

Petasyuk

2022

J. Coat. Sci. Technol.

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: Methodological features of indirect determining of thickness coating of grains grinding powders of synthetic diamond are analyzed. A newly revised classification of known methods for determining the thickness of the coating is proposed. The prospects of the methods based on the application of an external specific surface are noted. A positive feature is the proposal to determine the thickness of the coating separately for each grain of the sample, followed by the generalization of the results by calculating the arithmetic mean. This calculation scheme allows you to get more reliable information about the thickness of the coating. The expediency of using an extrapolation-affine 3D grain model in such a calculation scheme is substantiated. Using the extrapolation-affininе 3D grain model allows for determining the thickness of the coating of diamond powder grains without the traditional assumption about the spherical shape of their grains and with less error. For an example of grinding powder AC125 400/315, the advantage of such a 3D model compared to a 3D model in the form of a sphere is proved. The method proposed on the basis of such methodical innovation can be used for powders of other abrasive materials.

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Indirect Evaluation of the Thickness of Coatings on Synthetic-Diamond Powders with the Use of New 3D Grain Models

Petasiuk

2022

Mater Sci

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Electric-spark alloying of VT22 alloy by chromium and tungsten electrode materials

Cited by 4 publications

References 2 publications

Pycnometric-Additive Determining of the Degree of Coating of High-Strength Synthetic Diamond Grinding Powders using the Actual 3D Morphology of their Grains

Pycnometric-Additive Determining of the Degree of Coating of High-Strength Synthetic Diamond Grinding Powders using the Actual 3D Morphology of their Grains

Determining the Thickness Coating of Grinding Powders of Synthetic Diamond Based on a Specific-Surface Approach and using an Extrapolation-Affine 3D Model of Grain

Indirect Evaluation of the Thickness of Coatings on Synthetic-Diamond Powders with the Use of New 3D Grain Models

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