Simple relations among the elastic moduli of the polycrystalline intermetallic compounds LaM_xNi_(5-x) (M = AI,Sn)

摘要

An examination of the elastic moduli of a number of the polycrystalline intermetallic compounds LaM_xNi_(5-x) (M = Al,Sn) reveals a simple relation between the shear modulus, G, and Young's modulus, E. The results, for a wide range of x, show that the ratio G/E is approximately constant. Further, this constant for these hexagonal close packed (hep) structures is almost the same as that found many years ago for a large number of hep polycrystalline metallic elements. This result is shown to be useful for estimating other moduli from the knowledge of only the shear modulus.