Reserach of the mechanic-tribological characteristics of Ti3SiC2/TiC coatings after annealing

• Main Authors: D.B. Buitkenov, B.K. Rakhadilov, Zh.B. Sagdoldina, D. Erbolatuly
• Format: Article
• Language: English
• Published: L.N. Gumilyov Eurasian National University 2020-03-01
• Series: Eurasian Journal of Physics and Functional Materials
• Subjects: steel u9; titanium carbosilicide; heat treatment; microhardness; wear resistance
• Online Access: http://ephys.kz/index.php?view=article&id=200

This article investigates the influence of thermal annealing on microhardness and wear resistance of the surface of steel U9/Y9 protected by a composite coating Ti 3 SiC 2 /TiC obtained by detonation sputtering. Thermal annealing was performed in the range of temperatures 700-900 ◦ C during 1 hour. Following annealing the formation of TiO 2 and an increase in the phase content of Ti 3 SiC 2 are observed. Higher microhardness was obtained in coatings subjected to annealing at 800 ◦ C, which can be explained by an increase in the content of carbonized titanium. As the annealing temperature rises further, the thickness of the oxide layer increases, leading to a decrease in the microhardness for the coatings annealed at 900 ◦ C. According to the results of tribological tests, formation of the oxide increases wear resistance of Ti 3 SiC 2 /TiC composite surface coatings.