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Positron Studies of Subsurface Zone Created in Sliding Wear in Bismuth

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Abstract

The report about subsurface zone (SZ) created during dry sliding in pure bismuth is presented. The positron lifetime measurements revealed the well defined subsurface zone where the concentration of created during sliding vacancy clusters decreases exponentially with the depth from the worn surface increases. The experimental results are quite well described by the two state trapping model which allows to determine the positron trapping rate and hence deduce about the depth dependency of vacancy voids concentration. Despite of the low recrystallization temperature ca. 115 °C in this semimetal, determined also by the positron lifetime measurements, no significant effect of temperature rise due to sliding on the SZ constitution is observed.

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Authors and Affiliations

  1. Institute of Physics, Opole University, ul. Oleska 48, 45-052, Opole, Poland

    Jerzy Dryzek

  2. Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342, Kraków, Poland

    Jerzy Dryzek

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  1. Jerzy Dryzek
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Correspondence to Jerzy Dryzek.

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Dryzek, J. Positron Studies of Subsurface Zone Created in Sliding Wear in Bismuth. Tribol Lett 40, 175–180 (2010). https://doi.org/10.1007/s11249-010-9654-9

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