Tecnologia em Metalurgia, Materiais e Mineração (Oct 2014)

MICROSTRUCTURAL CHARACTERIZATION OF TiN/ZrN MULTILAYER COATINGS ON TITANIUM ALLOY PRODUCED BY POWDER METALLURGY

  • Vinicius André Rodrigues Henriques,
  • Octávio Camargo Schichi,
  • Eduardo Tavares Galvani

DOI
https://doi.org/10.4322/tmm.2014.029
Journal volume & issue
Vol. 11, no. 3
pp. 195 – 201

Abstract

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The development of multilayered structures has attracted attention from scientific community during recent years. TiN/ZrN coatings with a number of alternate layers have high potential for use in optical, electromagnetism and wear areas. In this work, three sets of multilayered TiN/ZrN coatings presenting variable thickness were designed and deposited by electron beam-physical vapor deposition (EB-PVD). Ti-35Nb-7Zr-5Ta substrates were produced by powder metallurgy from a mixture of hydrided powders with subsequent cold pressing steps and sintering at 1400°C, in high vacuum. TiN/ZrN coatings were obtained by evaporation of alternating Ti and Zr cylindrical targets under a nitrogen flow. The multilayer coatings were characterized by means of scanning electron microscopy (SEM), chemical analysis via energy dispersive spectrometry (EDS) and Vickers indentation. The multilayer produced showed homogeneous thickness and a consistent columnar structure.

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