TY  - JOUR
AB  - We evaluated the performance of five different commercially available nanoparticle classes as additives for an oil-based lubrication system. While the silicon dioxide particles Aerosil® 300, RY300, and R972V tended to increase wear and friction in our 100Cr6 versus cast iron disc–disc contact, Aeroxide® P 25 and especially T 805 TiO2 nanoparticles showed superior anti-wear and anti-friction properties. The underlying tribological mechanism was investigated with optical microscopy, helium ion microscopy, and X-ray photoelectron spectroscopy. Subsequently, we formulated a stable lubrication system based on the best performing T 805 particles. Here, the base oil is a highly purified paraffin oil which was supplemented with 1 wt% T 805 TiO2 particles, 1 wt% Estisol® 242 or 1 wt% oleic acid, 0.15 wt% oleylamine, and 0.15 wt% Pluronic® RPE 2520. Superior lubrication and anti-wear properties of this formulation were demonstrated in 4-h test runs with a normal force of F N  = 2.5 kN and a sliding velocity of 0.15 m/s in our disc–disc contact. Wear was significantly reduced along with a nearly 12-fold reduction in the friction coefficient, compared to the base oil (μftobase=0.155vs.μftoT805≈0.01). Using 100Cr6 disc–ball contacts, we additionally analyzed the properties of our lubrication system in the border friction regime under higher loads (F N  = 0.5 kN) in 2-h runs. In particular, on the discs with lower engagement ratio, chemo-tribological protective layers were built, which protected the parts very well against wear.
DA  - 2015
DO  - 10.1007/s11249-015-0557-7
KW  - Dispersion
KW  - Nanoparticle additives
KW  - Lubrication
KW  - Wear
KW  - Titanium dioxide
KW  - Friction
LA  - eng
IS  - 2
PY  - 2015
SN  - 1023-8883
T2  - Tribology Letters
TI  - An Oil-Based Lubrication System Based on Nanoparticular TiO2 with Superior Friction and Wear Properties
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-27590128
Y2  - 2024-12-25T19:01:20
ER  -