Tribology Online
Online ISSN : 1881-2198
ISSN-L : 1881-218X
Short Communication
Generation of Ammonia during Wear Processes in Adhesive Wear of Titanium
Hiroshi MishinaKentaro ChibaAlan Hase
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2015 Volume 10 Issue 2 Pages 201-206


We report a short note of preliminary and new experimental results that the generation of ammonia (i.e. nitrogen fixation) can occur on tribologically activated surfaces formed as a result of the frictional sliding of pure titanium when this is performed in a mixed gaseous environment of dinitrogen and dihydrogen at a total pressure of 6 × 10-4 Pa. Gaseous ammonia, synthesized at the tribologically activated surface on the actual area of contact and/or on fine debris of wear elements with a size of the order of ten or a few tens of nanometers, was detected by analyzing the partial pressures for each species between amu 1 and amu 50 present in the environmental gases during the sliding friction: this analysis was performed using a quadrupole mass spectrometer (QMS). This process, however, depends on the mode of wear, i.e. it is expected to occur only under mild conditions of wear.

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© 2015 by Japanese Society of Tribologists
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