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Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings

Opened Access Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings

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Autor: Rojas Ruíz, Teresa Cristina
El Mrabet, Said
Domínguez Meister, Santiago
Brizuela, Marta
García Luis, Alberto
Sánchez López, Juan Carlos
Fecha: 2012
Publicado en: Surface and Coatings Technology, 211 (104), 110-.
Tipo de documento: Artículo
Resumen: 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 (≈ 2 at.%) are deposited by d.c. reactive magnetron sputtering on silicon substrates using metallic targets and Ar/N2 mixtures. The hardness properties are found in the range of 22–33 GPa 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 c...
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Cita: Rojas Ruíz, T.C., El Mrabet, S., Domínguez Meister, S., Brizuela, M., García Luis, A. y Sánchez López, J.C. (2012). Chemical and microstructural characterization of (Y or Zr)-doped CrAlN coatings. Surface and Coatings Technology, 211 (104), 110-.
Tamaño: 708.5Kb
Formato: PDF

URI: https://hdl.handle.net/11441/73038

DOI: 10.1016/j.surfcoat.2011.07.071

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