Thermal oxidation of cold sprayed Ti-5Al-XZn coatings for tribological applications


Çetiner D., ATAR E., Derin C. B., Çimenoğlu H.

MATERIALS LETTERS, vol.274, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 274
  • Publication Date: 2020
  • Doi Number: 10.1016/j.matlet.2020.127959
  • Journal Name: MATERIALS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Coating, Cold spray, Deposition, Oxidation, Titanium, Wear and tribology, OXIDE, LAYER
  • Istanbul Technical University Affiliated: Yes

Abstract

Room temperature tribological behavior of the thermally oxidized (at 600 degrees C for 60 h in air) low-pressure cold spray coatings fabricated on a Co-Cr alloy by deposition of Ti (85-95 wt.%) and Al (5 wt.%) powder mixture with and without the addition of Zn powder (up to 10 wt.%) were examined. At the outermost surface, the thermal oxidation caused mainly formation of a wear resistant TiO2 layer; also containing ZnO over the Zn accumulated regions of the coatings. The presence of ZnO induced a reduction in the coefficient of friction to a value as low as 0.12 against the sliding contact of the Al2O3 counterface for the coating fabricated by deposition of the 5wt.%Zn containing powder mixture.