Chapter 32. Strength Measurement of Thick Brittle Coatings on Metals

  1. Don Bray
  1. Ö. Ünal,
  2. D. J. Sordelet,
  3. D. J. Barnard and
  4. M. Akinc

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch32

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Ünal, Ö., Sordelet, D. J., Barnard, D. J. and Akinc, M. (1998) Strength Measurement of Thick Brittle Coatings on Metals, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch32

Author Information

  1. Ames Laboratory, Ames, IA, 50011

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

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Keywords:

  • melting;
  • chrome refractories;
  • andalusite materials;
  • characteristic;
  • manufacturer's

Summary

Thick plasma sprayed Al2O3 and ZrO2 coatings were prepared on Alalloy substrates to determine their strength by the strength of materials approach with the assumption that they are elastic and well bonded at the interface. An analytical relationship between the critical (failure) load and the failure stress was derived as a function of geometric parameters and elastic modulus ratio of coating and substrate. The loading curves of the specimens revealed distinct regions due to brittle fracture of the coatings. Experimentally determined failure loads were used to calculate the strength values for the coatings.