Journal of Advanced Ceramics

, Volume 2, Issue 1, pp 87–102 | Cite as

Determination of fracture toughness using the area of micro-crack tracks left in brittle materials by Vickers indentation test

  • Alireza MoradkhaniEmail author
  • Hamidreza Baharvandi
  • Mehdi Tajdari
  • Hamidreza Latifi
  • Jukka Martikainen
Open Access
Research Article


In this article, a new method has been presented for the estimation of fracture toughness in brittle materials, which enjoys improved accuracy and reduced costs associated with fracture toughness testing procedure compared to similar previous methods, because a vast range of specimens with irregular cracks can be accommodated for testing. Micron-sized alumina powders containing 0.05 wt% magnesium oxide (MgO) nanoparticles were mixed and also together with 2.5 vol%, 5 vol%, 7.5 vol%, 10 vol%, and 15 vol% of silicon carbide (SiC) nanopowders separately. By making and testing various types of ceramics with different mechanical properties, and considering the irregular cracks around the indented area caused by Vickers diamond indenter, a semi-empirical fracture toughness equation has been obtained.


fracture toughness mechanical properties nanocomposites indentation 


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© The Author(s) 2013

This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Authors and Affiliations

  • Alireza Moradkhani
    • 1
    Email author
  • Hamidreza Baharvandi
    • 2
  • Mehdi Tajdari
    • 3
  • Hamidreza Latifi
    • 4
  • Jukka Martikainen
    • 4
  1. 1.Department of Mechanical Engineering, Science and Research BranchIslamic Azad University, Hesarak, PoonakTehranIran
  2. 2.Department of Materials EngineeringMalek Ashtar University of Technology, LavizanTehranIran
  3. 3.Department of Mechanical Engineering, Science and Research BranchIslamic Azad UniversityArakIran
  4. 4.Department of Mechanical Engineering, Laboratory of Welding TechnologyLappeenranta University of TechnologyLappeenrantaFinland

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