Originally Posted By: MolaKule
Maybe Jetronic and others could re-read the complete paper:
Quote:
A new technology for improving the poor oil solubility of TiO2 nanoparticles in base oil is thus suggested. Nanoparticles added in oil possessing excellent dispersing stability were obtained under the new technology.
TiO2 nano-articles (100 nm in size) were processed using a special oleic-acid process to improve dispersibility. TiO2 partcles weren't just dumped into the oil. They were specially
processed and then added to the base oil.
Quote:
Wear tests were carried out with a four-ball tribometer. At the end of each test, the mean wear scar diameter (WSD) on the three down balls was measured using a digital reading optical microscope with an accuracy of 0.01 mm. The steel balls used in the tribological test had a diameter of 12.7 mm made of Rul2 bearing steel with an HRC of 59–61 hardness.
The above is a conventional laboratory
wear test to determine how the newly processed TiO2 nano-articles (100 nm in size) protected steel specimens in an oil bath under load.
Quote:
The friction coefficient of the oil was measured both with a model based on the principle of reciprocating friction on a ball-on-disk tribometer and with a four-ball tribometer according to ASTM D5183-95. The tribological conditions of model reciprocating friction were: a frequency of 25 Hz, a stroke length of 1 mm, a temperature of 75C, an applied load of 100 N, a duration of the test of 30 min.
The friction test was conducted in a reciprocating “ball-on-disk” mode, through the oscillation of a Rul2 steel ball (12.7 mm) over a Rul2 steel disk (Φ25 ˆ 8 mm) in the oil samples being tested. The arithmetic average surface roughness (Ra) of the disk was about 0.016 µm with an oscillation of 1 mm of the ball on disk.
The above is a conventional laboratory
friction test to determine the friction coefficient of steel specimens in an oil bath under load.
Quote:
It should be helpful for the TiO2 nanoparticles used as additives in engine oil, gear oil, and other industrial lubricants.
So the modified TiO2 elixr is NOT for gear oils alone.
There are other processes for making organo-metallic anti-wear and friction modification compounds without nano-particle powders.
For example:
There are processes for preparing the organo-metal compounds which involves converting an alkali metal dihydrate of a Group VI metal; e.g., sodium metal dihydrate, to the corresponding metal acid hydrate of the Group VI metal. The metal acid hydrate is then reacted with an alkyl amine to form the organo-metal compound.
This can be done with Molybdenum, Titanium, Tungsten, Antimony, or just about any other metal.
Thanks for the explanation.
Question for you: Titanium oxide is used to coat drill bits because it has a hardness far greater than tool steel. Do these Titanium oxide nanoparticles then act much like MSO2 in greases, to reduce shock-wear?