Contribution of titanium, chromium and carbon buffer interlayers to bio-tribological properties of multilayer composites

• Autorzy: Major Ł. , Janusz M. , Lackner J. M. , Major B.

Identyfikatory

DOI

DOI: 10.1515/amm-2016-0228

• Języki publikacji: EN

Abstrakty

EN

Research studies on bio-tribological protective coatings of titanium, chromium and carbon based have been performed. Thin films were fabricated by hybrid PLD technique (PLD supported by magnetron sputtering). Coatings consisted of two parts; the inner part (first from the substrate) in each case was formed by titanium or chromium/titanium nitride or chromium nitride (Ti/TiN or Cr/Cr₂N). The outer part was formed by pure DLC or multilayer DLC'Ti or Cr. No delamination was found at the interface. Titanium or chromium metallic layer was deposited as a first layer directly on the metallic substrate to avoid delamination. All individual layers were built of columnar nano- crystallites. Mechanisms of the mechanical wear of analyzed systems were presented, focusing on the cracking propagation in ball-on-disc tests using an 1 N and 5 N applied loads for 5 000 cycles. Complex microstmcture analysis of presented nano-multilayer coatings, before and after mechanical tests, were performed by means of transmission electron microscopy (TEM). The highest stress concentration during mechanical uploading was moved through the multilayer coating by breaking only one layer at the time. The microstructure characterization revealed that cracking propagating in the outer part of the coating was stopped at the interface. In the case of the inner part of the coating Ti/TiN; Cr/Cr₂N, ceramic layers showed brittle cracking, while metallic (Ti or Cr) ones deformed plastically. Fabricated coatings were subjected under the analysis in the biomechanical system optimized to test for the direct contact with a human whole blood. The study considered physiological conditions mainly related to the temperature and humidity and the frequency of cyclic deformation of the artificial vessel into which the tested sample was introduced.

Słowa kluczowe

EN

bio-tribological coatings; wear mechanism; microstructure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 3
• Strony: 1391--1398
• Opis fizyczny: Bibliogr. 31 poz., rys., wykr.

Twórcy

autor

Major Ł.

• Institute of Metallurgy and Materials, Pas., 25 Reymonta str., 30-059 Krakow, Poland

autor

Janusz M.

• Institute of Metallurgy and Materials, Pas., 25 Reymonta str., 30-059 Krakow, Poland

autor

Lackner J. M.

• Joanneum Research, Materials -Institute for Surface Technologies and Photonics, Leoben, Austria

autor

Major B.

• Institute of Metallurgy and Materials, Pas., 25 Reymonta str., 30-059 Krakow, Poland

Bibliografia

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Uwagi

EN

Research Project (National Science Centre): Multilayered, wear resistant, self-healing, protective coatings elaboration for carbon fiber composite materials. Number: 2012/06/M/ST8/ 00408. Research Project (National Science Centre): Biomechanical and microstruture analysis of multilayer nanocomposite, protective coatings for metallic substrates for tissue interaction. Number: 2012/07/B/ST8/03396.