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XPS investigations of tribolayers formed on TiN and (Ti,Re)N coatings

  • Serkan Oktay
  • , Zafer Kahraman
  • , Mustafa Urgen
  • , Kursat Kazmanli*
  • *Bu çalışma için yazışmadan sorumlu yazar
  • Istanbul Technical University

Araştırma sonucu: Dergiye katkıMakalebilirkişi

131 Atıf (Scopus)

Özet

TiN and (Ti,Re)N coatings were deposited on high-speed-steel substrates by a hybrid coating system composed of cathodic arc PVD and magnetron sputtering techniques. In order to keep rhenium content low (8 ± 1.9 at.%) in the coating, magnetron sputtering technique was utilized to evaporate rhenium. The (Ti,Re)N coating consisted of TiN and ReN x (x > 1.33) phases. The hardness of TiN and (Ti,Re)N were 31 GPa and 29 GPa (± 2 GPa), respectively. Tribological behaviors of the samples were tested against Al 2 O 3 balls at 21°C (RT) and 150°C (HT) by reciprocating wear technique. The tribolayers were analyzed by XPS technique. Friction coefficients of TiN were 0.56, 0.35 for 21°C and 150°C tests, respectively. Rhenium addition to TiN drastically dropped the friction coefficients to 0.22 and 0.17 for RT and HT samples. Rhenium addition also improved the wear resistance of the coating at both test temperatures. For TiN, main oxide component of the tribolayers was Ti 2 O 3 for RT tests and TiO 2 for HT tests. The oxide layer formed on (Ti,Re)N were the mixture of TiO 2 , TiON, ReO 2 and Re 2 O 7 for both test temperatures. Re 2 O 7 provided very low friction coefficient to (Ti,Re)N. The findings are consistent with the crystal chemistry approach.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)255-261
Sayfa sayısı7
DergiApplied Surface Science
Hacim328
DOI'lar
Yayın durumuYayınlandı - 15 Şub 2015

Bibliyografik not

Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Finansman

A part of this study was supported by The Scientific and Technological Research Council of Turkey (TUBITAK, project #105M146). The authors gratefully thank Prof. Dr. Gültekin Göller, Hüseyin Sezer and Berk Alkan for their technical supports in SEM and XPS investigations.

FinansörlerFinansör numarası
TUBITAK105M146
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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