Cu-Based Bulk Metallic Glass Composites Containing In-Situ T

Cu-Based Bulk Metallic Glass Composites Containing In-Situ TiC and TiB Particles
H. Wang, H.M. Fu, H.F. Zhang, and Z.Q Hu

Cu-based bulk metallic glasses (BMGs) are of relative low cost and high strength, which have been considered to have more potential for engineering applications. Two Cu-based BMGs containing TiC and Ti2B particles respectively have been successfully developed using copper mould injection casting. TiC and Ti2B particles with a size of about 4-10 mm are in-situ formed and uniformly distributed in the BMG matrix. The volume fraction of the reinforcement particles is up to 30%. The two-phase BMG composites exhibite 2% plastic strain after yielding and the hardness of the materials increase by 25%. On the fracture surface, besides of vein patterns, honeycomb-like characteristics are observed, which might be responsible for the plasticity enhancement. The in-situ particles also restrict shear band propagation and change its direction, which results in an increase of compressive fracture strength. However, a high particle level causes stress concentration on the particle agglomeration and liquid droplets are observed.

Publisher: TMS
Product Format: PDF
Pages: 145-154
Date Published: June 1, 2007
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