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Indentation size effect and Vickers microhardness measurement of metal-modified arsenic chalcogenide glasses

T. KAVETSKYY1,2, J. BORC3, K. SANGWAL3,* , V. TSMOTS1

Affiliation

  1. Solid State Microelectronics Laboratory, Drohobych Ivan Franko State Pedagogical University, ul. I. Franko 24, Drohobych, 82100, Ukraine
  2. Institute of Materials, Scientific Research Company “Carat”, ul. Stryjska 202, Lviv, 79031, Ukraine
  3. Department of Applied Physics, Lublin University of Technology, ul. Nadbystrzycka 38, 20-618 Lublin, Poland

Abstract

The experimental results of a systematic investigation of the microhardness of two systems of metal-modified arsenic chalcogenide glasses: Xx(As2S3)100−x (x = 0 or 15, and X = Ag and AgI) and As2Se3 without and with 0.5 at.% RE (RE = Nd, Sm, Ho and Er) for applied indentation load ranging from 0.005 to 1 N are described and discussed. It was found that, with an increase in load P, for both systems the microhardness HV first increases, then decreases showing a maximum hardness Hmax, and finally increases again after attaining a minimum hardness Hmin. Analysis of the experimental data on hardness HV as a function of indentation diagonal d according to the relation: H = H0(1+d0/d), where H0 is the load independent hardness and d0 is a constant, revealed that: (1) doping substances lead to the softening of As2S3 samples and hardening of As2Se3 samples, and the hardening of the matrix may be attributed to the size of doping substance, (2) formation of cracks in chalcogenide glasses follows the general concepts of fracture mechanics and their generation depends only on the basic glass matrix but is not affected by dopants and their chemical nature, and (3) the load-independent indentation microhardness H0 of a sample may be determined only from indentation data obtained in the load interval where HV decreases with an increase in applied P..

Keywords

Arsenic chalcogenide glasses, Dopants, Indentation cracks, Indentation hardness, Indentation size effect..

Submitted at: Sept. 24, 2010
Accepted at: Oct. 14, 2010

Citation

T. KAVETSKYY, J. BORC, K. SANGWAL, V. TSMOTS, Indentation size effect and Vickers microhardness measurement of metal-modified arsenic chalcogenide glasses, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 10, pp. 2082-2091 (2010)