This article is cited in 8 papers

Mechanical properties, strength physics and plasticity

Destruction dynamics of a heterogeneous body (diorite) under friction

V. I. Vettegren^a, A. V. Ponomarev^b, I. P. Shcherbakov^a, R. I. Mamalimov<sup>a

a</sup> Ioffe Institute, St. Petersburg
^b Institute of Physics of the Earth, Russian Academy of Scienses

Abstract: Triboluminescence bursts are observed in two heterogeneous (diorite) specimens under friction against each other. Triboluminescence appears upon the relaxation of excited free $\equiv$ Si–O$^-$ radicals and Fe$^{3+}$ ions and the capture of electrons with acceptor traps formed upon the destruction of the plagioclase crystal lattice. The analysis of the time dependence of these bursts shows that the friction surfaces accumulate clusters, in which the concentration of free $\equiv$ Si–O$^-$ radicals and electron traps is at least an order of magnitude higher than in their surrounding. The time interval between the appearance of two sequential clusters variates from 0.1 to 1 $\mu$s. The linear sizes of clusters are $\sim$0.5 $\mu$m.

Received: 27.03.2017

DOI: 10.21883/FTT.2017.11.45072.093

 English version: Physics of the Solid State, 2017, 59:11, 2286–2289

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