• S. NANTHINI
• B. SANTOSHKUMAR
• P. KRISHNAMOORTHY
• N.R.RAJAGOPALAN

From aqueous solution, by slow solvent evaporation technique, good quality single crystals of cadmium chloride doped tetrakis(thiourea) barium chloride (CTTBC) have been grown and successfully harvested. In an effort to shed light on the mechanical behaviour of the title crystal and to assess its mechanical strength, Vickers micro hardness study has been performed. The hardness study has been done on the crack free crystal surface using loads of 25 to 100 g in steps of 25 g increment and the indentation time of 8 s has been used in all trials. The hardness measurements have suggested a reverse indentation size effect (RISE) pattern of the CTTBC crystal where hardness number has been found to be linearly increasing with the applied load. As an extension of this study, the RISE pattern has been validated by making used of the theoretical models proposed by Meyer and Hays – Kendall. In addition, the mechanical robustness of the crystal has been authenticated by deducing the appropriate mechanical parameters such as elastic modulus, fracture toughness, yield strength, brittleness constant, corrected hardness and elastic stiffness constant.

Vicker’s micro hardness; RISE; Meyer’s law; mechanical parameters

"Investigation Of The Effect Of Cd2+ Doping On The Mechanical Properties Of Tetrakis(Thiourea) Barium Chloride Nonlinear Optical Crystal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 11, page no.216-221, November-2018, Available :http://www.jetir.org/papers/JETIR1811531.pdf

"Investigation Of The Effect Of Cd2+ Doping On The Mechanical Properties Of Tetrakis(Thiourea) Barium Chloride Nonlinear Optical Crystal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 11, page no. pp216-221, November-2018, Available at : http://www.jetir.org/papers/JETIR1811531.pdf