STRUCTURE AND TRIBO-MECHANICAL PROPERTIES OF THE CERAMIC COATING MODIFIED BY NANOSIZED TiN DURING ITS SHAPING
Abstract
Oxide-ceramic coatings during the process of Micro-Arc Oxidation (MAO) with nanoscale titanium nitride were modified, which allowed one to obtain oxide-nitride ceramics in the shape of a coating on an aluminum alloy D16. The highest concentration of titanium nitride was registered in the surface coating layers, and the modification area extended to 1/3 of its thickness. It was found that the modification was accompanied by a 1.2–1.4-fold increase in the microhardness that achieved 23 GPa. Tribological tests under boundary lubrication showed that the modification of the MAO-coating with titanium nitride reduced the friction coefficient by a factor of 1.5–2.8 as compared to an unmodified coating. In addition to improving anti-friction properties, the wear resistance of coatings increased by a factor of 3–5.
About the Authors
A. I. KOMAROV
Joint Institute of Mechanical Engineering of National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
P. A. VITYAZ
Joint Institute of Mechanical Engineering of National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
V. I. KOMAROVA
Joint Institute of Mechanical Engineering of National Academy of Sciences of Belarus, Minsk
Belarus
Belarus
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