Estimation of Microhardness and Its Related Parameters on Some Glycine Complexes
Single crystals of glycine zinc chloride (GZC), glycine lithium sulphate (GLS), triglycine sulphate (TGS) and glycine phosphite (GPI) were grown from their respective aqueous solutions by slow evaporation method. The variation of Vickers hardness with load (10–100 g) on the glycine complexes viz. (101) GZC, (001) GLS, (001) TGS and (010) GPI crystals was studied using microindentation technique. It was found that the hardness increases with applied load up to 40 g and thereafter attains a saturation value for all the crystals under study. From the cracks initiated along the corners of the indentation impression, crack lengths were measured and the fracture toughness value and brittle index number were determined at each load for all the crystals. Some other hardness related parameters viz. yield strength and Young's modulus have been estimated. The anisotropic nature of the crystals is studied using Knoop indentation technique.
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Document Type: Research Article
Publication date: June 1, 2014
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