https://onlinelibrary.wiley.com/doi/full/10.1002/eng2.12216
The micro‐pitting wear occurred due to the asperities contact of rings and liner surfaces. Further, there might be a poor film of lubrication between these asperity contacts. The fatigue cracks occurred on the top compression ring was due to the weakening of rings material due to thermal loads as top compression ring was always subjected to the higher pressure and temperature of the combustion zone. All the rings showed three‐body wear mechanism due to the hard solid wear particles that arise due to the friction between rings and liner. These particles get trapped between rings liner assembly forming a deep groove on the rings and liner surfaces. Further, in the case of 1 wt.% BN nanofluid, a tribofilm has been formed on the surfaces of rings and liner which is shown in Figure 11A to D. The surface wears observed in case of base oil 20W40 were filled up or trapped with BN nanoparticles due to adsorption mechanism and resulted in the formation of tribofilm.
Hexagonal boron nitride (HBN) is used as a lubricant (weakly held layers can slide over each other), and can have semiconductor properties (after doping?). Because of its 'soft' and 'slippery' crystalline nature, HBN is used in lubricants and cosmetic preparations.
US9494062B1 - Method of improving piston ring seal by start-up ...
A method for ensuring a good ring seal is for use in assembling a new engine or ... (b) boron nitrideOK so it should help prevent the piston seals from seizing... thereby losing compression.
https://advancedenginetech.com/high-class_lubricants-and-additives/micro-ceramic-oil/
I'm talking about this stuff. Seems like they've got more corroboration now.
oops says "not for use in automatic transmission oil." I think I checked that out before.
NOT for use in automatic transmissions.
OH they mean the differential oil... (NOT automatic differential oil only manual gear box oil).
It is used mixed with engine oil, gearbox oil (only on manual transmission), not automatic, in the differential oil. It mixes well with 200 ml of oil and is added to the engine oil possibly hot.
Googletranslated review:
I had already purchased this additive due to the excessive oil consumption of
my machine (40gr of boron nitride and tungsten powder) but I decided to redo
the treatment because I continued to have the high consumption of oil. I increased
the dose with another 40gr of boron nitride only and apparently maybe
I hit the target. Initially the car ate 1kg of oil every 1000km (far too many);
I checked the oil level after 500km from the last treatment, and he ate very
little oil. And without changing the type of oil (to reduce consumption they
usually recommend going up with the number of SAEs): I'm using a 0W-20 which
I think is not more fluid! I also noticed that already after the first treatment
the machine is less noisy (the engine runs with less vibrations) and consumption
has also been affected for the better. However, if in the future it will be
necessary, I am also resigned to switching to thicker oils, but for the moment
everything is OK. Recommended product.
.............................
Fast and accurate delivery, test product (boron nitride) on my
Smart with 112000 km, traveled only 750 km, optimal cold start
noticed a smoother and slightly reduced engine consumption Less noisy. For the moment great product.
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