Coefficient of friction and wear of sputtered a-C thin coatings containing Mo

Petr Novák, J. Musil, R. Čerstvỳ, A. Jäger

Результат исследований: Материалы для журналаСтатья

11 Цитирования (Scopus)

Выдержка

The paper reports on preparation of ~3000nm thick a-C coatings containing Mo, interrelationships between their mechanical properties, a coefficient of friction μ and wear rate k and the effect of Mo content in the a-C coating on these interrelationships. The Mo-C coatings were prepared by sputtering using an unbalanced magnetron (UM) equipped with a graphite targets (Ø=100mm, 99.9% purity) fixed to the UM cathode with Mo ring of different inner diameter Ø i. The content of Mo in the a-C coating was controlled by Ø i. It is shown that μ and k of the coating strongly depend not only on its hardness H but also on its effective Young's modulus E *=E/(1-ν 2), the ratios H/E *, H 3/E *2 and the elastic recovery W e; here E is the Young's modulus and ν is the Poisson ratio. The ratio H 3/E *2 characterizes the resistance of coating to plastic deformation. Coatings with a low amount of Mo composed of nanograins of carbides dispersed in a-C matrix exhibit low values of μ≈0.07 and k≈10 -7mm 3/Nm measured with WC ball at the rotation speed v=0.05m/s, total sliding length l=1000m and the load L=2N.

Язык оригиналаАнглийский
Страницы (с-по)1486-1490
Число страниц5
ЖурналSurface and Coatings Technology
Том205
Номер выпуска5
DOI
СостояниеОпубликовано - 25 ноя 2010

Отпечаток

coefficient of friction
Wear of materials
Friction
coatings
Coatings
modulus of elasticity
Elastic moduli
Graphite
Poisson ratio
carbides
plastic deformation
Sputtering
Carbides
sliding
balls
Plastic deformation
purity
Cathodes
hardness
graphite

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Цитировать

Coefficient of friction and wear of sputtered a-C thin coatings containing Mo. / Novák, Petr; Musil, J.; Čerstvỳ, R.; Jäger, A.

В: Surface and Coatings Technology, Том 205, № 5, 25.11.2010, стр. 1486-1490.

Результат исследований: Материалы для журналаСтатья

Novák, Petr ; Musil, J. ; Čerstvỳ, R. ; Jäger, A. / Coefficient of friction and wear of sputtered a-C thin coatings containing Mo. В: Surface and Coatings Technology. 2010 ; Том 205, № 5. стр. 1486-1490.
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