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MICROHARDNESS OF Pb MODIFIED CHALCOGENIDE GLASSES

A. K. Pattanaik1, P. S. Robi2, A. Srinivasan1,*

Affiliation

  1. Department of Physics, Indian Institute of Technology Guwahati, Guwahati-781039, India
  2. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati-781039, India

Abstract

Microhardness of bulk PbxGe42-xSe58 (3 x 15), Pb20GexSe80-x (17 x 24), PbxGe42-xSe48Te10 (3 £ x £ 15) and Pb20GexSe70-xTe10 (17 £ x £ 24) glasses was measured at room temperature. In Pb20GexSe80-x and Pb20GexSe70-xTe10 glasses, microhardness attained a maximum value at the composition with 21 at. wt. % Ge. In the case of PbxGe42-xSe58 and PbxGe42-xSe48Te10 glasses, the microhardness decreased with the addition of Pb. The variation in microhardness with composition and the effect of Te substitution on the microhardness of these glasses are discussed in the light of the change in the average bond energy of the glasses..

Keywords

Microhardness, Glass transition temperature, Chalcogenide glasses.

Submitted at: Dec. 13, 2002
Accepted at: March 12, 2003

Citation

A. K. Pattanaik, P. S. Robi, A. Srinivasan, MICROHARDNESS OF Pb MODIFIED CHALCOGENIDE GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 1, pp. 35-38 (2003)