I believe that it was the folks at The University of Arkansas that mentioned how they actually created the boric oxide coating on their COF test rig.
https://www.google.com/search?q=Magn...hrome&ie=UTF-8
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The best I can tell from the existing literature, 'boric-oxide' plating was 'never' created by ANL, inside an internal combustion engine by the introduction of boric acid to the motor oil.
It was never a feature of the US PATENT of 1995, which was the basis for MotorSilk's use of the patent after it expired in 2012.
Some of LOGIC's comments appear to be cribbed directly from MotorSilk's advertising propaganda dating to 2012, one month after Dr. Erdemir stated that Argonne was just then considering boric acid nanotechnology for automotive applications.
MotorSilk and LOGIC are both mistaken in attributing '85% the hardness of diamond' to boric-oxide.
That hardness belongs to cubic lattice-Boron-Nitride, which cannot be created anywhere outside of the likes of General Electric Abrasives, who manufacture it for industrial / commercial abrasive processes.