Chapter 53. Strength Characterisation of Small Ceramic Discs Using the Ball on Three Balls Test

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Andreas Börger1,
  2. Peter Supancic2 and
  3. Robert Danzer1,2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch53

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

How to Cite

Börger, A., Supancic, P. and Danzer, R. (2003) Strength Characterisation of Small Ceramic Discs Using the Ball on Three Balls Test, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch53

Author Information

  1. 1

    Institut für Struktur- und Funktionskeramik, Montanuniversität Leoben, A-8700 Leoben, Austria

  2. 2

    Materials Center, Leoben, A-8700 Leoben, Austria

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

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Keywords:

  • brittle materials;
  • geometrical inaccuracies;
  • miniaturisation;
  • materials elastic properties;
  • alumina ceramic

Summary

The ball on three balls (B3B) test is a simple, robust and cheap method to evaluate the strength of brittle materials. It has several advantages compared to the common three or four point bending tests, e. g. the test results are not influenced by edges or small geometrical inaccuracies of specimens and of test assembly, the specimen preparation is -in many cases -much cheaper. Furthermore the B3B test assembly has a large capability for miniaturisation.

In a recent paper the relationship between the experimental parameters (applied load, specimen and loading geometry, materials elastic properties) and the stress state has been determined. In this paper the B3B-test is used to measure the strength of an alumina ceramic on discs of different size. A pronounced size effect on strength is observed (the strength of large discs is smaller than that of small discs), which can be explained within the framework of the Weibull theory.