Performance characteristics of modified antifriction coatings based on the metal composition

Ipatov, A. G.; Shmykov, S. N.

doi:10.22314/2618-8287-2020-58-1-186-194

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Optimal growth and development of cotton at all developmental stages is essential. Because of the formation of vegetative and generative organs, a high quality cotton crop is grown [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Plant Thickness and Cotton Row Spacing on Dry Mass Accumulation

Muhammadov,

Salomov,

Salomov

2024

BIO Web Conf.

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In thi article, the medium-fiber cotton variety “Ravnaq-1” was processed at different 60 cm (control), 70 cm, and 76 cm row spacings in a cultivator adopted (in Uzbekistan) and a milling cultivator with a 76 cm row spacing, along with the theoretical seedling thickness. The analysis results of the scientific research on dry mass accumulation of cotton leaving 90-100 thousand bushels/ha and 120-130 thousand bushels/ha are presented. In the conducted research, the dry mass of one cotton bush in 2020 was 118.1-97.6 grams, in 2021 it was 131. It was 2-107.5 grams. That is, when the number of saplings is large, the dry mass of one plant decreases, when analyzed per hectare, it was found that higher dry mass was accumulated in all variants when the theoretical thickness of seedlings was 90-100 thousand bush/ha, when it was 120-130 thousand bush/ha. The highest rate of dry mass accumulation per bush in different row spacings was observed in both years of the study in the case of milling cultivator with a row spacing of 76 cm and theoretical seedling thickness of 90-100 thousand bush/ha, proportionally 138.9-151 It was .5 grams. It was found that this indicator accumulated more dry mass by 20.8-41.3 grams in the first year of the study than the control variants, and by 20.3-44 grams in the second year.

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Section: Introductionmentioning

confidence: 99%

Effect of Plant Thickness and Cotton Row Spacing on Dry Mass Accumulation

Muhammadov,

Salomov,

Salomov

2024

BIO Web Conf.

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“…As proved by theoretical and practical works on cotton [1][2][3][4][5][6][7][8][9][10][11], wild and ruderal forms of cultivated species and primordial wild species of cotton have many traits that are missing in cultivated varieties due to genes and gene complexes, such as precocity, drought resistance, deciduousness, immunity to diseases, resistance to agricultural pests, uniquely high fiber quality (strength, fineness, silkiness) and etc. [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Physiological and Cytological Features of Fertilization, Formation of the Embryo and Endosperm During Interspecies Hybridization of Cotton

Daminova,

Rakhmankulov,

Jalolov

2023

BIO Web of Conferences

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The article presents the data of physiological and cytological studies on the study of the features of the process of fertilization, the formation of the embryo and endosperm in the distant interspecific hybridization of cotton. Normally, the influx of hormones that regulate the division of the endosperm occurs in the opposite direction of the movement of phloem and xylem nutrient flows, which cause the movement of division waves and end by the 8th-9th day with the cell formation of the nuclear endosperm, which occurs by delimiting the cytoplasm around the nuclei through the formation of chains of vesicles emerging cell walls, followed by the formation of cell walls. And in the process of formation of a distant interspecific endosperm, a massive multiple formation of abnormal nuclei occurs, which remain viable due to the total metabolism and only in the common cytoplasm of a multinuclear cenocyte. It was revealed that the imbalance of the chromosomal composition of the nuclei in the common nuclear coenocyte leads to the death of its nuclei before the stage of cell formation and, therefore, when interspecific embryos switch to endosperm nutrition, they lose it, which blocks further growth and development of interspecific embryos inside the forming seed.

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Synthesis of Antifriction Coatings by the Fabo Method

Ipatov¹,

Shmykov²

2021

TSM

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In the paper, the technology of obtaining antifriction coatings by the method of finishing antifriction-free abrasive treatment with the implementation of the wear-free effect is proposed. (Research purpose) The research purpose is in developing an effective technology for obtaining copper coatings on the surface of steel parts of the shaft type to reduce the wear rate in the conditions of oil starvation of machine parts. (Materials and methods) During the study, a laboratory facility for the synthesis of antifriction coatings on the surface of steel parts by the method of finishing antifriction-free abrasive treatment has been developed. Brass of the LS-59-1 brand was used as a material for applying a copper antifriction coating. In order to activate the surface of the part and the surface of the filler material, a technological medium based on a ten percent solution of hydrochloric acid and glycerol was used. Authors determined the composition of the technological environment empirically. The obtained laboratory samples were subjected to tribological studies in comparison with standard antifriction alloys. X-ray diffraction studies were performed to determine the phase composition. (Results and discussion) As a result of X-ray diffraction studies of laboratory samples, the presence of iron and copper components in the synthesized coating was studied. The content of oxides on the surface of the coating is insignificant, the internal structure is dense with no visible porosity. The coating consists of 95 percent copper, the synthesis process takes place without oxidation, which gives the coating a high adhesive and cohesive strength. The coating thickness is uniform and varies within 3-5 micrometers. (Conclusions) Comparative tribological studies have shown high resistance to wear and to the setting of the contact surfaces under conditions of oil starvation. The coefficient of friction is stable and low and is in the range of 0.08-0.15. The developed technology makes it possible to increase the wear resistance of steel parts of the shaft type in the shortest possible time and with minimal material costs and can be successfully implemented in the conditions of repair enterprises.

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Performance characteristics of modified antifriction coatings based on the metal composition

Cited by 3 publications

References 7 publications

Effect of Plant Thickness and Cotton Row Spacing on Dry Mass Accumulation

Effect of Plant Thickness and Cotton Row Spacing on Dry Mass Accumulation

Physiological and Cytological Features of Fertilization, Formation of the Embryo and Endosperm During Interspecies Hybridization of Cotton

Synthesis of Antifriction Coatings by the Fabo Method

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