Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions
In this paper, the abrasive effects of lunar simulant regoliths (LHS-1, LMS-1) have been investigated. Sealing performance of different sealant pin materials on stainless steel has been tested by the pin-on-disc method. Pin materials included block types such as pure polytetrafluoroethylene (PTFE),...
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MDPI AG
2025-01-01
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| author | György Barkó Gábor Kalácska Tamás Bálint Ádám Sarankó Ádám Kalácska Ewelina Ryszawa László Székely Zoltán Károly |
| author_facet | György Barkó Gábor Kalácska Tamás Bálint Ádám Sarankó Ádám Kalácska Ewelina Ryszawa László Székely Zoltán Károly |
| author_sort | György Barkó |
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| description | In this paper, the abrasive effects of lunar simulant regoliths (LHS-1, LMS-1) have been investigated. Sealing performance of different sealant pin materials on stainless steel has been tested by the pin-on-disc method. Pin materials included block types such as pure polytetrafluoroethylene (PTFE), composite PTFE, as well as braided PTFE and hybrid-composite braided PTFE. Tribological properties were evaluated based on measured friction, wear, surface roughness and scanning electron micrographs. Most significant differences were observed in the sealing effect of the pins between the braided and the block-type pin materials. The stainless steel/pin pairs showed significantly higher (0.4–0.5) friction coefficients for the braided pins than the block ones (0.2–0.3), while there was not a significant difference in the abrasive effect of the different lunar regoliths. Although significant wear of the steel part occurred only with the block-type pins, this disadvantage was apparent in comparison with the braided pins. The abrasive particles caused deformation and eventually complete disintegration of the braided pins. Both the coefficient of friction and the wear could be estimated by a multiple linear regression model, in which different regolith size was the dominant independent parameter for the various pins. |
| format | Article |
| id | doaj-art-888ac8f1676744119adabc7f5cf149aa |
| institution | DOAJ |
| issn | 2075-4442 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Lubricants |
| spelling | doaj-art-888ac8f1676744119adabc7f5cf149aa2025-08-20T02:44:39ZengMDPI AGLubricants2075-44422025-01-011324310.3390/lubricants13020043Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith ConditionsGyörgy Barkó0Gábor Kalácska1Tamás Bálint2Ádám Sarankó3Ádám Kalácska4Ewelina Ryszawa5László Székely6Zoltán Károly7Institute of Technology, Szent István Campus, Hungarian University of Agriculture and Life Sciences (MATE), Páter K. u. 1., H-2100 Gödöllő, HungaryInstitute of Technology, Szent István Campus, Hungarian University of Agriculture and Life Sciences (MATE), Páter K. u. 1., H-2100 Gödöllő, HungaryInstitute of Technology, Szent István Campus, Hungarian University of Agriculture and Life Sciences (MATE), Páter K. u. 1., H-2100 Gödöllő, HungaryInstitute of Technology, Szent István Campus, Hungarian University of Agriculture and Life Sciences (MATE), Páter K. u. 1., H-2100 Gödöllő, HungarySoete Laboratory, Department of Electromechanical, Systems and Metal Engineering, Ghent University, Technologiepark 46, B-9052 Zwijnaarde, BelgiumEuropean Space Agency/ESTEC/TEC-MSM/EL128 Keplerlaan 1, P.O. Box 299, NL-2200 AG Noordwijk, The NetherlandsInstitute of Mathematics and Basic Science, Department of Mathematics and Modelling, Szent István Campus, Hungarian University of Agriculture and Life Sciences (MATE), Páter K. u. 1., H-2100 Gödöllő, HungaryHUN-REN Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar Tudósok krt. 2., H-1117 Budapest, HungaryIn this paper, the abrasive effects of lunar simulant regoliths (LHS-1, LMS-1) have been investigated. Sealing performance of different sealant pin materials on stainless steel has been tested by the pin-on-disc method. Pin materials included block types such as pure polytetrafluoroethylene (PTFE), composite PTFE, as well as braided PTFE and hybrid-composite braided PTFE. Tribological properties were evaluated based on measured friction, wear, surface roughness and scanning electron micrographs. Most significant differences were observed in the sealing effect of the pins between the braided and the block-type pin materials. The stainless steel/pin pairs showed significantly higher (0.4–0.5) friction coefficients for the braided pins than the block ones (0.2–0.3), while there was not a significant difference in the abrasive effect of the different lunar regoliths. Although significant wear of the steel part occurred only with the block-type pins, this disadvantage was apparent in comparison with the braided pins. The abrasive particles caused deformation and eventually complete disintegration of the braided pins. Both the coefficient of friction and the wear could be estimated by a multiple linear regression model, in which different regolith size was the dominant independent parameter for the various pins.https://www.mdpi.com/2075-4442/13/2/43lunar regolithssealantsabrasive testwearfriction |
| spellingShingle | György Barkó Gábor Kalácska Tamás Bálint Ádám Sarankó Ádám Kalácska Ewelina Ryszawa László Székely Zoltán Károly Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions Lubricants lunar regoliths sealants abrasive test wear friction |
| title | Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions |
| title_full | Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions |
| title_fullStr | Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions |
| title_full_unstemmed | Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions |
| title_short | Abrasion Behaviour of Natural and Composite Polytetrafluoroethylene Seal Materials Against Stainless Steel in Lunar Regolith Conditions |
| title_sort | abrasion behaviour of natural and composite polytetrafluoroethylene seal materials against stainless steel in lunar regolith conditions |
| topic | lunar regoliths sealants abrasive test wear friction |
| url | https://www.mdpi.com/2075-4442/13/2/43 |
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