Study of thermo-elastic properties of nanomaterials under high temperature

The present study is based on the thermo-elastic properties of some nanomaterials under the effect of temperature. Out of the thermo-elastic properties the thermal expansivity (alpha(T)), volume thermal expansion (V/V-o) and bulk modulus (K-T) have been calculated using integral form of equation of state (IFEOS) as proposed by Singh and Gupta. IFEOS is based on the fact that Anderson Gruneisen parameter (delta(T)) strongly depends on temperature. This equation of state has been applied to some nanomaterials like nanocrystalline nickel Ni, fullerene and n-(Ni+Fe) alloy. The results of thermal expansivity (alpha(T)) and volume thermal expansion (V/V-o) for fullerene were compared to the previous data based on molecular simulation method and the results of thermal expansivity (alpha(T)) obtained for n-Ni and n-(Ni+Fe) were compared to the available experimental data which was found to be in close agreement with them. Therefore this study supports the validity of IFEOS for nanomaterials. (C) 2008 Published by Elsevier B.V.