| タイトル | A Solid Film Lubricant Composition for Use at High Sliding Velocities in Liquid Nitrogen |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150018853 |
| 著者（英） | Wisander, D. W.; Johnson, R. L. |
| 発行日 | 1960-01-01
1960 |
| 言語 | eng |
| 内容記述 | Solid-lubricant-containing compositions can be of value as films and solid bodies for bearing and seal surfaces in low-temperature liquefied gases. An experimental composition including polytetrafluoroethylene (PTFE), an epoxy resin, and lithium-alumina-silicate was studied in friction, wear, and endurance experiments in liquid nitrogen (320 F). This composition was formulated to approximate the thermal expansion of metals used in cryogenic systems. Hemisphere (3/6-in. radius) rider specimens were used and in most experiments the load was 1000 g. Films (0.005-in. thick) on disk specimens gave good endurance life, low rider wear, and desirable friction (f = 0.02 to 0.07). They functioned at a higher sliding velocity (no failure at 16, 000 ft/min) with copper rider specimens than with stainless steel riders (failure at 9000 ft/min). Solid rider material of the experimental composition had good friction and wear properties at sliding velocities above 4000 ft/min. It is important to use the experimental composition with mating materials having good thermal conductivity. |
| NASA分類 | Nonmetallic Materials |
| 権利 | No Copyright |
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