Journal of Materials Science

, Volume 24, Issue 12, pp 4495–4504 | Cite as

Slip patterns in sliding sphere experiments on (110) single crystal Mn-Zn ferrite

  • A. Broese Van Groenou
  • S. E. Kadijk


By sliding a 0.25 mm radius ruby sphere on a (1 1 0) Mn-Zn ferrite crystal grooves have been made at speeds from 0.4 to 400 μm sec−1, at loads from 1 to 7 N and after 1 to 100 passes. The temperature was varied from 20 to 290° C. As in indentations, the slip patterns are found on {1 0 0}, {1 1 1} and {1 1 0} slip systems, due to 〈1 1 0〉 slip along either a vertical Burgers vector or a vector under 60° with the normal. At low loads the inclined slip systems predominate. Cross-slip in the 60° systems is observed in several directions of sliding. Cross-slip occurs at higher loads on the vertical systems as in indentations. The threshold for both primary and secondary slip is speed dependent. At higher temperatures the main slip system is {1 0 0}, on both vertical and inclined systems. The relative importance of nucleation and propagation of slip is discussed. The groove depth varies with the same parameters as the line patterns, but a direct connection between number of lines and depth could not be made. The angular variation of the depth at low load has been related to the resolved shear stress for the slip systems involved. The result is a yield curve for slip along the inclined Burgers vectors.


Shear Stress Ferrite High Load Slip System Ruby 
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Copyright information

© Chapman and Hall Ltd 1989

Authors and Affiliations

  • A. Broese Van Groenou
    • 1
  • S. E. Kadijk
    • 1
  1. 1.Philips Research LaboratoriesJA EindhovenThe Netherlands

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