Influence of spark plasma sintering parameters on the mechanical properties of Cu50Zr45Al5 bulk metallic glass obtained using metallic glass powder

Sandrine Cardinal (1) , Jean-Marc Pelletier (1) , J.C. Qiao (1) , G. Bonnefont (1) , G. Xie

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

Gas atomized Cu50Zr45Al5 amorphous powder was densified by spark plasma sintering, in order to obtain bulk metallic glasses with larger size than that obtained by the conventional casting strategy. The influence of different parameters was investigated: sintering temperature, isothermal holding time as well as size of the specimens. After optimization of the processing parameters, dense and amorphous specimens were elaborated with a diameter up to 30 mm. Thermal stability and mechanical properties of consolidated samples are similar to those of Cu50Zr45 Al5 cast alloy. A hardness of 535 HV and a compressive strength of 1600 MPa have been obtained. Fractographic investigation indicated an intergranular rupture mode which leads to lower toughness compared to as the cast material, but for these samples the size is limited to 3 mm. However an increase in applied pressure (from 90 MPa to 1 GPa) induces a significant improvement in bonding between powder particles. © 2016

Mots clés: Aluminum; Compressive strength; Glass; Mechanical properties; Metals; Microstructure; Sintering; Spark plasma sintering; Bulk metallic glass; Conventional casting; Intergranular rupture; Isothermal holding time; Metallic glass powders; Powder densification; Processing parameters; Sintering temperatures; Metallic glass

Domaines: Matériaux

Sandrine Cardinal, Jean-Marc Pelletier, J.C. Qiao, G. Bonnefont, G. Xie. Influence of spark plasma sintering parameters on the mechanical properties of Cu50Zr45Al5 bulk metallic glass obtained using metallic glass powder. Materials Science and Engineering: A, 2016, 677, pp.116-124. ⟨10.1016/j.msea.2016.09.032⟩. ⟨hal-01804512⟩