 |
NASA Technical Reports Server (NTRS) 19990009051: Magnetic Fluid Fr... |
 |
by NASA Technical Reports Server (NTRS) |
 |
Thumbnail |
|
Download |
 |
Web page |
|
|
|
The friction and wear properties of two groups of |
|
magnetic fluids, one developed at NASA Lewis Research |
|
Center and a commercial fluid, were evaluated for |
|
boundary lubrication. Friction and wear measurements were |
|
made using a pin-on-disk apparatus. Three different ball |
|
materials were evaluated, (1) 440C, (2) Al2O3, and (3) |
|
Si3N4 against 440C disks. The first class of magnetic |
|
fluids have a low vapor pressure hydrocarbon base oil and |
|
are suitable for space application. Four variations of |
|
this fluid were evaluated: (1) the base oil, (2) base oil |
|
with anti-wear additives, (3) a 100 Gauss strength |
|
magnetic fluid, and (4) a 400 gauss magnetic fluid. The |
|
commercial fluid base oil and four different magnetic |
|
particle concentration levels have been evaluated. A |
|
space qualified fluorinated lubricant was tested for base |
|
line comparison. Hardness, optical microscopy, surface |
|
profilometry, and surface analysis were used to |
|
characterize the test specimens. Friction was unaffected |
|
by the concentration of magnetic particles. Wear rates |
|
for magnetic fluids were slightly higher than the base |
|
oil. The low vapor pressure magnetic fluid has better |
|
wear characteristics than the space qualified fluorinated |
|
lubricant. |
|
|
|
Date Published: 2016-10-15 09:07:42 |
|
Identifier: NASA_NTRS_Archive_19990009051 |
|
Item Size: 7144229 |
|
Language: english |
|
Media Type: texts |
|
|
|
# Topics |
|
NASA Technical Reports Server (NTRS);... |
|
|
|
# Collections |
|
NASA_NTRS_Archive |
|
additional_collections |
|
|
|
# Uploaded by |
|
@chris85 |
|
|
|
# Similar Items |
|
View similar items |
|
|
|
PHAROS |
|
