Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties
The paper is devoted to studying the chemical elements distribution in the material’s structure depending on the manufacturing technological parameters and their effect on properties of a new self-lubricating antifriction composite based on powder nickel alloy EP975 with CaF<sub>2</sub>...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/9/3404 |
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| author | Kayode Olaleye Tetiana Roik Adam Kurzawa Oleg Gavrysh Iulia Vitsiuk Krzysztof Jamroziak |
| author_facet | Kayode Olaleye Tetiana Roik Adam Kurzawa Oleg Gavrysh Iulia Vitsiuk Krzysztof Jamroziak |
| author_sort | Kayode Olaleye |
| collection | DOAJ |
| description | The paper is devoted to studying the chemical elements distribution in the material’s structure depending on the manufacturing technological parameters and their effect on properties of a new self-lubricating antifriction composite based on powder nickel alloy EP975 with CaF<sub>2</sub> solid lubricant for operation at temperature 800 °C and loads up to 5.0 MPa, in air. The study is focused on the features of alloying elements distribution in the composite matrix, which depends on the manufacturing technology. A uniform distribution of all alloying elements in the studied composite was shown. The chemical elements’ uniform distribution in the material is associated with one of the most important preparatory technological operations in the general manufacturing technology used. This is a technological operation of mixing powders with subsequent analysis of the finished mixture. The uniform distribution of chemical elements determines the uniform arrangement of carbides and intermetallics in the composite. General manufacturing technology, which includes the main operations, such as hot isostatic pressing technology and hardening heat treatment, contributed to the obtainment of a practically isotropic composite with almost the same properties in the longitudinal and transverse directions. Because of the composite’s structural homogeneity, without texturing, characteristics are isotropic. Improving the material’s structural homogeneity helps to keep its mechanical and anti-friction qualities stable at high temperatures and stresses in the air. The performed studies demonstrated the correctness of the developed manufacturing technology that was confirmed by the electron microscopy method, micro-X-ray spectral analysis, mechanical and tribological tests. The developed high-temperature antifriction composite can be recommended for severe operating conditions, such as friction units of turbines, gas pumping stations, and high-temperature units of foundry metallurgical equipment. |
| first_indexed | 2024-03-10T03:57:47Z |
| format | Article |
| id | doaj.art-b0afe06c8a64420094552dee511d2673 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:57:47Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b0afe06c8a64420094552dee511d26732023-11-23T08:42:52ZengMDPI AGMaterials1996-19442022-05-01159340410.3390/ma15093404Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on PropertiesKayode Olaleye0Tetiana Roik1Adam Kurzawa2Oleg Gavrysh3Iulia Vitsiuk4Krzysztof Jamroziak5Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 27 Wyspianskiego Str., 50-370 Wroclaw, PolandNational Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremogy Ave., 03057 Kyiv, UkraineDepartment of Lightweight Elements Engineering, Foundry and Automation, Wroclaw University of Science and Technology, 27 Wyspianskiego Str., 50-370 Wroclaw, PolandNational Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremogy Ave., 03057 Kyiv, UkraineNational Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremogy Ave., 03057 Kyiv, UkraineDepartment of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 27 Wyspianskiego Str., 50-370 Wroclaw, PolandThe paper is devoted to studying the chemical elements distribution in the material’s structure depending on the manufacturing technological parameters and their effect on properties of a new self-lubricating antifriction composite based on powder nickel alloy EP975 with CaF<sub>2</sub> solid lubricant for operation at temperature 800 °C and loads up to 5.0 MPa, in air. The study is focused on the features of alloying elements distribution in the composite matrix, which depends on the manufacturing technology. A uniform distribution of all alloying elements in the studied composite was shown. The chemical elements’ uniform distribution in the material is associated with one of the most important preparatory technological operations in the general manufacturing technology used. This is a technological operation of mixing powders with subsequent analysis of the finished mixture. The uniform distribution of chemical elements determines the uniform arrangement of carbides and intermetallics in the composite. General manufacturing technology, which includes the main operations, such as hot isostatic pressing technology and hardening heat treatment, contributed to the obtainment of a practically isotropic composite with almost the same properties in the longitudinal and transverse directions. Because of the composite’s structural homogeneity, without texturing, characteristics are isotropic. Improving the material’s structural homogeneity helps to keep its mechanical and anti-friction qualities stable at high temperatures and stresses in the air. The performed studies demonstrated the correctness of the developed manufacturing technology that was confirmed by the electron microscopy method, micro-X-ray spectral analysis, mechanical and tribological tests. The developed high-temperature antifriction composite can be recommended for severe operating conditions, such as friction units of turbines, gas pumping stations, and high-temperature units of foundry metallurgical equipment.https://www.mdpi.com/1996-1944/15/9/3404powdernickel alloyantifriction compositetechnologyalloying elementsstructure |
| spellingShingle | Kayode Olaleye Tetiana Roik Adam Kurzawa Oleg Gavrysh Iulia Vitsiuk Krzysztof Jamroziak Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties Materials powder nickel alloy antifriction composite technology alloying elements structure |
| title | Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties |
| title_full | Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties |
| title_fullStr | Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties |
| title_full_unstemmed | Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties |
| title_short | Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties |
| title_sort | structure formation in antifriction composites with a nickel matrix and its effect on properties |
| topic | powder nickel alloy antifriction composite technology alloying elements structure |
| url | https://www.mdpi.com/1996-1944/15/9/3404 |
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