The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage
Abstract Leakage currents accelerate surface degradation of metal contacts via small scale arcing across lubricating films, but recent observations suggest that metallic nanoparticle additives in lubricants may be useful to improve contact performance. These findings prompted a study that examined e...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2024-01-01
|
| Series: | Friction |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40544-023-0837-4 |
| _version_ | 1797273285339119616 |
|---|---|
| author | Samuel Bond Robert L. Jackson German Mills |
| author_facet | Samuel Bond Robert L. Jackson German Mills |
| author_sort | Samuel Bond |
| collection | DOAJ |
| description | Abstract Leakage currents accelerate surface degradation of metal contacts via small scale arcing across lubricating films, but recent observations suggest that metallic nanoparticle additives in lubricants may be useful to improve contact performance. These findings prompted a study that examined electrically induced surface pitting of steel contacts in the presence of several lubricating greases including some containing nanometer-sized colloidal silver (Ag) particles. Reciprocating rolling sphere-on-disk experiments were conducted under electro-tribological loads employing polyurea greases derived from mineral and synthetic base oils with and without additives. Friction forces and electrical resistance were monitored continuously during the tests; surface changes were characterized by means of optical spectroscopy, stylus profilometry, and scanning electron microscopy (SEM) including compositional analysis using energy dispersive spectroscopy (EDS). The observations demonstrate that surface pitting induced by arcing occurs mainly at the points were the rolling motion changes direction and that eroded metal is deposited along the wear grove. Micron-sized pits are formed which contain carbon and oxygen indicating that arcing causes decomposition of the hydrocarbon lubricants. Numerous findings indicate a significant inhibition of pitting is induced by the Ag nanoparticles; some greases containing other additives exhibit a similar, although less pronounced, effect. |
| first_indexed | 2024-03-07T14:42:15Z |
| format | Article |
| id | doaj.art-f190d8de41c24fab9a783c18270ea936 |
| institution | Directory Open Access Journal |
| issn | 2223-7690 2223-7704 |
| language | English |
| last_indexed | 2024-03-07T14:42:15Z |
| publishDate | 2024-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Friction |
| spelling | doaj.art-f190d8de41c24fab9a783c18270ea9362024-03-05T20:19:26ZengSpringerOpenFriction2223-76902223-77042024-01-0112479681110.1007/s40544-023-0837-4The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damageSamuel Bond0Robert L. Jackson1German Mills2Department of Chemistry and Biochemistry, Auburn UniversityDepartment of Mechanical Engineering, Auburn UniversityDepartment of Chemistry and Biochemistry, Auburn UniversityAbstract Leakage currents accelerate surface degradation of metal contacts via small scale arcing across lubricating films, but recent observations suggest that metallic nanoparticle additives in lubricants may be useful to improve contact performance. These findings prompted a study that examined electrically induced surface pitting of steel contacts in the presence of several lubricating greases including some containing nanometer-sized colloidal silver (Ag) particles. Reciprocating rolling sphere-on-disk experiments were conducted under electro-tribological loads employing polyurea greases derived from mineral and synthetic base oils with and without additives. Friction forces and electrical resistance were monitored continuously during the tests; surface changes were characterized by means of optical spectroscopy, stylus profilometry, and scanning electron microscopy (SEM) including compositional analysis using energy dispersive spectroscopy (EDS). The observations demonstrate that surface pitting induced by arcing occurs mainly at the points were the rolling motion changes direction and that eroded metal is deposited along the wear grove. Micron-sized pits are formed which contain carbon and oxygen indicating that arcing causes decomposition of the hydrocarbon lubricants. Numerous findings indicate a significant inhibition of pitting is induced by the Ag nanoparticles; some greases containing other additives exhibit a similar, although less pronounced, effect.https://doi.org/10.1007/s40544-023-0837-4electric motor bearingswheel bearingselectric vehiclesarcingelectrically induced bearing damagepitting |
| spellingShingle | Samuel Bond Robert L. Jackson German Mills The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage Friction electric motor bearings wheel bearings electric vehicles arcing electrically induced bearing damage pitting |
| title | The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage |
| title_full | The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage |
| title_fullStr | The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage |
| title_full_unstemmed | The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage |
| title_short | The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage |
| title_sort | influence of various grease compositions and silver nanoparticle additives on electrically induced rolling element bearing damage |
| topic | electric motor bearings wheel bearings electric vehicles arcing electrically induced bearing damage pitting |
| url | https://doi.org/10.1007/s40544-023-0837-4 |
| work_keys_str_mv | AT samuelbond theinfluenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage AT robertljackson theinfluenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage AT germanmills theinfluenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage AT samuelbond influenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage AT robertljackson influenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage AT germanmills influenceofvariousgreasecompositionsandsilvernanoparticleadditivesonelectricallyinducedrollingelementbearingdamage |