Decorative boride coatings based on LaB6

  • Mitterer C
  • Komenda-Stallmaier J
  • Losbichler P
 et al. 
  • 4

    Readers

    Mendeley users who have this article in their library.
  • 14

    Citations

    Citations of this article.

Abstract

Decorative coatings of lanthanum boride were deposited onto steel and molybdenum substrates employing d.c. magnetron sputter deposition using LaB6targets. The characterization of the coatings was achieved by means of scanning electron microscopy, electron probe microanalysis and X-ray diffraction. The results were discussed in connection with application-related properties, such as film hardness and colour determined by Vickers microhardness and CIE-L*a*b* colorimeter measurements. The aim of this work was the investigation of the interrelationships between the chemical composition, microstructure, hardness and colour of the coatings. Sputtering of LaB6targets results in the formation of extremely fine columnar films with predominantly (100)-oriented LaB6crystals. With increasing process gas pressure, an increase in the (100) texture and a decrease in the lattice distortion were observed. Likewise, the boron-to-lanthanum atomic ratio decreased from 6.8 to 6.5. With increasing argon pressure, a distinct decrease in the brilliance value L* was observed, resulting in a shift in colour from dark violet to almost black. The maximum Vickers microhardness of the coatings was approximately 2900 HV0.01. The results of the investigations establish the correlations between the stoichiometry, microstructure, hardness and film coloration for decorative coatings based on LaB6. © 1995 Elsevier Science S.A.

Author-supplied keywords

  • Decorative coatings
  • Lanthanum hexaboride
  • Microstructure
  • Properties
  • Sputtering

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free