RT Journal Article
T1 Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings
A1 Rojas, T. C.
A1 El Mrabet, S.
A1 Domínguez-Meister, S.
A1 Brizuela, M.
A1 García-Luis, A.
A1 Sánchez-López, J. C.
AB Magnetron sputtered chromium aluminium nitride films are excellent candidates for advanced machining and protection for high temperature applications. In this work CrAlN-based coatings including Y or Zr as dopants (2at.%) are deposited by d.c. reactive magnetron sputtering on silicon substrates using metallic targets and Ar/N 2 mixtures. The hardness properties are found in the range of 22-33GPa with H/E ratios close to 0.1. The influence of the dopant element in terms of oxidation resistance after heating in air at 1000°C is studied by means of X-ray diffraction (XRD), cross-sectional scanning electron microscopy (X-SEM) and energy dispersive X-ray analysis (EDX). The microstructure and chemical bonding are investigated using a transmission electron microscope (TEM) and electron energy-loss spectroscopy (EELS) respectively. The improvement in oxidation resistance as compared to pure CrN coating is manifested in the formation of a Al-rich outer layer that protects the underneath coating from oxygen diffusion. The best performance obtained with the CrAlYN film is investigated by in situ annealing of this sample inside the TEM in order to gain knowledge about the structural and chemical transformations induced during heating.
SN 0257-8972
YR 2012
FD 2012-10-25
LK https://hdl.handle.net/11556/2980
UL https://hdl.handle.net/11556/2980
LA eng
NO Rojas , T C , El Mrabet , S , Domínguez-Meister , S , Brizuela , M , García-Luis , A & Sánchez-López , J C 2012 , ' Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings ' , Surface and Coatings Technology , vol. 211 , pp. 104-110 . https://doi.org/10.1016/j.surfcoat.2011.07.071
NO The authors are grateful to the Spanish Ministry of Science and Innovation (Project Nos. MAT2007-66881-C02-01 , MAT2010-21597-C02-01 and Consolider FUNCOAT CSD2008-00023 ), Junta de Andalucía ( TEP217 ) and I3P programme of CSIC for financial support.
DS TECNALIA Publications
RD 30 jul 2024