' better COF of BA compared to Molybdenum Disulphide '
That would depend on :
- the 'size' of the BA particles
- the 'concentration' ( by weight ) of the particles
- the test 'load' ( contact pressure ) on the test machine.
- The temperature at which the test was conducted
- Substrate of pin and disk, 440 C steel, 52100 steel, alumina, sapphire ( steel on steel, steel on alumina, alumina-on-alumina, sapphire on steel, sapphire on alumina, sapphire on sapphire etc. )
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In the 1995 Argonne patent, the only 'Motor Oil' tested was SAE 15W-40.
- This baseline oil was...................................... COF= 0.110
- The 1% (wt) nBA-friction- modified 15W-40 was COF= 0.090 ( 18.18% lower ) not 1000%
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- GROUP-III 5W-30 SI with 1.5%(wt) Oleylamide...COF = 0.080 @ 60-C
- RedLine MTL 75W-80...................................... COF= 0.076
- PAO-4 with surfactant & 5% nBA...................... COF- 0.070
- Ford Motor Company SAE 5W-30 with MoDTC......COF = 0.067
- RedLine 10W-30............................................. COF= 0.05517
- RedLine SAE 30W SF........................................COF= 0.054
- RedLine SAE 20W-50....................................... COF= 0.05226
- PAO-4 with 1% nBA......................................... COF= 0.050
- RedLine SAE 40W............................................. COF= 0.043
- PTFE on PTFE.............................................. ..... COF= 0.0200
- RedLine MTL 75W-80......................................... COF= 0.015 @ 800-RPM
- RedLine MTL 75W-80......................................... COF= 0.100 @ 1437-RPM
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Last edited by aerohead; 04-14-2025 at 12:03 PM..
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