| タイトル | Enhancement of perfluoropolyether boundary lubrication performance: I. Preliminary results |
| 本文（外部サイト） | http://hdl.handle.net/2060/19950024200 |
| 著者（英） | Wedeven, L. D.; Jones, W. R., Jr.; Premore, R. E.; Goodell, A. J.; Devine, E.; Ajayi, O. O. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1995-06-01 |
| 言語 | eng |
| 内容記述 | A ball bearing simulator operating under starved conditions was used to evaluate the boundary lubrication performance of a perfluoropolyether (PFPE) Krytox 143 AB. Several approaches to enhance boundary lubrication were studied. These included: (1) soluble boundary additives, (2) bearing surface modifications, (3) 'run-in' surface films, and (4) ceramic bearing components. In addition, results were compared with two non-perfluorinated liquid lubricant formulations. Based on these preliminary tests, the following tentative conclusions can be made: (1) substantial improvements in boundary lubrication performance were observed with a beta-diketone boundary additive and a tricresyl phosphate (TCP) liquid surface pretreatment; (2) the use of rough Si3N4 balls (Ra = 40 micro-in) also provided substantial improvement but with concomitant abrasive wear; (3) marginal improvements were seen with two boundary additives (a phosphine and a phosphatriazine) and a neat (100%) fluid (a carboxylic acid terminated PFPE); and surface pretreatments with a synthetic hydrocarbon, a PTFE coating, and TiC coated 440C and smooth Si3N4 balls (R(sub a) less than 1 micro-in); and (4) two non-PFPE lubricant formulations (a PAO and a synthetic hydrocarbon) yielded substantial improvements. |
| NASA分類 | NONMETALLIC MATERIALS |
| レポートNO | 95N30621
NASA-TM-106937
E-9665
NAS 1.15:106937 |
| 権利 | No Copyright |
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