Abstract. Objective. To carry out research on the production technology of powder materials used in the production of products with additive technology, to apply the obtained results for the purposes of powder metallurgy. Methods. The mechanical methods of obtaining metal powders are studied in the article, and the properties of formation without significant changes in the chemical composition of the powder material are highlighted. Results. Depending on the aggregate state of the initial components in the reaction zone, results were obtained for three main types of the reaction process: solid-phase, non-gaseous and gaseous types. It was found that during the solid phase reaction, the metal particles in the powder mixture retain their original size. It was found that the reaction rate of gasless combustion does not depend on pressure and the constant mass of the formed particle is maintained. The dependence of the gas combustion reaction rate on pressure and the change in the mass of powder particles during the process were determined. Conclusion . In the process of mechanochemical synthesis, it is necessary to take into account the increase in the volume fraction of the three-sided bond boundary with the decrease in the size of the particles. In the process of preparing the powder material, its positive feature is its low temperature and high speed fusion, while maintaining its plasticity with the reduction of the particle size. The reduction of the particle size reduces the porosity of the powder, which increases the density and strength of the prepared product.
| Mualliflar | Асатиллаев, Йулдашали, Исроилов, Низомжон |
|---|---|
| Jurnal | Наманган муҳандисликтехнология институти илмийтехника журнали |
| Nashr sanasi | 2023-12-30 |
| Jild | 8 |
| Son | 4 |
| Betlar | 230-236 |
| Til | Ingliz |
| DOI | 10.61151/stjniet.v8i4.222 |
DOI: 10.61151/stjniet.v8i4.222 · Maqolaning asl sahifasi
Key words: additive, ultraviolet, laser, powder, synthesis, layer, particles, growth, mechanochemical, combination.
To theoretically substantiate the interaction of zinc sulfate with monoammonium phosphate, an isomolar series was used, based on the ratio of the components ZnSO4 and NH4H2PO4.
Cleaning the fiber from impurities in textile enterprises consists in increasing the cleaning efficiency of the fiber due to the installation of a special pipe in the front part of the cleaning machine.
The study utilizes the Katalco-58 industrial catalyst from Johnson Matthey Catalysts, composed of 13 wt.% Cu/27 wt.% ZnO/60 wt.% Al2O3, in the dehydration of methanol to DME. The catalytic activity of the samples was…
To describe mathematical models that calculate geo-technological indicators necessary for the management of physical-chemical hydrodynamic processes. Analyzing methods for solving these models and developing analytical…
The rheological characteristics (density, viscosity) of acidic and ammoniated phosphate slurries obtained from the decomposition of Khodjakul phosphate powder with extraction phosphoric acid (EPA) in a wide range of…
The article discusses the design of the saw cylinder of the genie DP-130 family. Ways to improve performance have been studied. A shaft with a hexagonal cross-section was considered as an energy- and resource-saving…
....
One of the major challenges faced when designing garments in garment dyeing is the significant shrinkage of cotton fabric in both length and width during the dyeing process. In previous researches, shrinkage values of…
. The importance of special clothing for workers who are working in closed buildings in the exchange of air (heat) between the human body and the environment has been studied. In this case, as samples of special…
Objective. It is a study of the influence of the use of various fuels on engine performance and the performance properties of oils. Methods. During the research, the laws of lubrication theory, methods of planning…
Наманган муҳандисликтехнология институти илмийтехника журнали — barcha maqolalar