Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride
Due to their properties, porous sliding bearings are considered to be maintenance-free, which means that no lubrication is required during operation. Their design enables operation at low rotational speeds with high load. Another effect of this bearing design is the lubrication continuity in the tri...
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MDPI AG
2022-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/15/5112 |
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| author | Krzysztof Gocman Tadeusz Kałdoński Bolesław Giemza Artur Król |
| author_facet | Krzysztof Gocman Tadeusz Kałdoński Bolesław Giemza Artur Król |
| author_sort | Krzysztof Gocman |
| collection | DOAJ |
| description | Due to their properties, porous sliding bearings are considered to be maintenance-free, which means that no lubrication is required during operation. Their design enables operation at low rotational speeds with high load. Another effect of this bearing design is the lubrication continuity in the tribological pair. In this study, the selected tribological properties (such as load capacity and permeability) of new-generation iron porous bearings with boron nitride powder were experimentally investigated. Tests were carried out under various conditions, using unique test apparatus. The addition of 3% (weight) of hexagonal boron nitride (hBN) significantly increased the load capacity of tested porous bearings in comparison to the same standard bearings containing 2.5% copper. The obtained p<sub>gr</sub>·v rating reached almost 7 MPa, which is a value almost three times higher than the requirements for this type of bearing. It is worth emphasizing that such a result was obtained despite a noticeable deterioration in the air and oil permeability of the bearing. |
| first_indexed | 2024-03-09T05:17:21Z |
| format | Article |
| id | doaj.art-9ab6d6af68de4394b45ff556db35b49d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:17:21Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9ab6d6af68de4394b45ff556db35b49d2023-12-03T12:44:40ZengMDPI AGMaterials1996-19442022-07-011515511210.3390/ma15155112Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron NitrideKrzysztof Gocman0Tadeusz Kałdoński1Bolesław Giemza2Artur Król3Faculty of Mechanical Engineering, Military University of Technology, 00-908 Warsaw, PolandFaculty of Mechanical Engineering, Military University of Technology, 00-908 Warsaw, PolandPropellants and Lubricants Division, The Air Force Institute of Technology, Ksiecia Boleslawa St. 6, 01-494 Warsaw, PolandInstitute of Vehicles and Transportation, NATO Defense College, Via Giorgio Pelosi 1, 00143 Rome, ItalyDue to their properties, porous sliding bearings are considered to be maintenance-free, which means that no lubrication is required during operation. Their design enables operation at low rotational speeds with high load. Another effect of this bearing design is the lubrication continuity in the tribological pair. In this study, the selected tribological properties (such as load capacity and permeability) of new-generation iron porous bearings with boron nitride powder were experimentally investigated. Tests were carried out under various conditions, using unique test apparatus. The addition of 3% (weight) of hexagonal boron nitride (hBN) significantly increased the load capacity of tested porous bearings in comparison to the same standard bearings containing 2.5% copper. The obtained p<sub>gr</sub>·v rating reached almost 7 MPa, which is a value almost three times higher than the requirements for this type of bearing. It is worth emphasizing that such a result was obtained despite a noticeable deterioration in the air and oil permeability of the bearing.https://www.mdpi.com/1996-1944/15/15/5112self-lubricationfrictionporous metal bearingsiron sinterboron nitride |
| spellingShingle | Krzysztof Gocman Tadeusz Kałdoński Bolesław Giemza Artur Król Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride Materials self-lubrication friction porous metal bearings iron sinter boron nitride |
| title | Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride |
| title_full | Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride |
| title_fullStr | Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride |
| title_full_unstemmed | Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride |
| title_short | Permeability and Load Capacity of Iron Porous Bearings with the Addition of Hexagonal Boron Nitride |
| title_sort | permeability and load capacity of iron porous bearings with the addition of hexagonal boron nitride |
| topic | self-lubrication friction porous metal bearings iron sinter boron nitride |
| url | https://www.mdpi.com/1996-1944/15/15/5112 |
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