Effect of reinforcement volume fraction on the density & elastic parameters of BMG’s matrix composites

Abstract

The influence of reinforcement volume percentage on the densities and longitudinal elastic modulus of unidirectional Zr_41.2Ti_13.8Cu_12.5Ni₁₀Be_22.5, Vit.1, Bulk metallic glass matrix composites, reinforced with glass E, Fe, Mo, Ni, Cr, Mn, Nb, Cd, Pt, U, Cu or Zr fibers, has been investigated. It was found the elastic moduli of high volume fraction composites are improved with the introduction of certain materials reinforcement such as Mo, Pt, Cr, Fe, U, etc. However, they decrease with some other materials reinforcements, as in the case of glass E and Cd. Moreover, we showed that the densities and elastic moduli variations of these materials depend on the ratio between matrix and fiber parameters. Finally, we were able to deduce a relation between densities, elastic moduli and reinforcement volume fraction.

Keywords: Bulk metallic glass – Composite - Reinforcement - Elastic constants