Mechanical properties of multilayer coatings deposited by PVD techniques onto the brass substrate

• Autorzy: Lukaszkowicz K. , Dobrzański L. A. , Zarychta A. , Cunha L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This research was done to investigate the mechanical properties of coatings deposited by PVD techniques onto brass substrate. Design/methodology/approach: The coatings were produced by reactive dc magnetron sputtering. The microstructure of the coatings was cross section examined using scanning electron microscope. The residual stress was obtained from the parabolic deflection of the samples, after the coating deposition applying Stoney’s equation. The microhardness and Young’s modulus tests were made on the dynamic ultra-microhardness tester. Tests of the coatings’ adhesion to the substrate material were made using the scratch test. Findings: Obtained results show that all the coatings are in a state of compressive residual stress. The lower values of the internal stresses in multilayer coatings result from the possibility of stress release in the successive alternating layers of the relatively soft titanium. Highest hardness values are obtained in monolayer coatings. The stiffness of the examined coatings is between 195 ÷ 330 mN/μm, while Young’s modulus is between 210 ÷ 348 GPa. Concerning the adhesion of the coatings measured by scratch test, it has been stated that the critical load LC2 for coatings, deposited onto the brass ranges from 40 to 50 N. The greatest critical load has been obtained for monolayer coatings. Research limitations/implications: In order to evaluate with more detail the possibility of applying these coatings in tools, further investigations should be concentrated on the determination of the tribological properties of the coatings. Practical implications: The tools and functional materials coated by the PVD process have shown significant improvement. Good properties of the PVD coatings make these coatings suitable for various technical and industrial applications. Originality/value: It should be stressed that the mechanical properties of the PVD coatings obtained in this work are very encouraging and therefore their application for products manufactured at mass scale is possible in all cases where reliable, very hard and abrasion resistant coatings, deposited onto brass substrate are needed.

Słowa kluczowe

EN

thin coatings; thick coatings; residual stresses; scratch test; Young's modulus; microhardnes

PL

cienkie powłoki; powłoki grube; naprężenia własne; próba zarysowania; moduł Younga; mikrotwardość

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 15, nr 1-2
• Strony: 47--52
• Opis fizyczny: Bibliogr. 21 poz., rys., tab., wykr.

Twórcy

autor

Lukaszkowicz K.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Dobrzański L. A.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Zarychta A.

• Division of Materials Processing Technology and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Cunha L.

• Physics Department, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal

Bibliografia

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