Dual phase metallic glassy composites with large-size and ultra-high strength fabricated by spark plasma sintering

Approach of the spark plasma sintering mechanism in Zr57Cu20Al10Ni8Ti5 metallic glass

“…Consolidation with SPS of atomized MG powders has thus been obtained for Fe-based alloys, with good magnetic properties [14,15], for Cu-and Ni-based alloys with high hardness and strength [16,17]. The technique has also shown further perspective for the development of architectured materials with the fabrication of in situ composites (devitrification in powder fabrication [18] or during SPS [19]), ex situ composites by powder mixing [20,21], or dual amorphous materials [22]. These new architectured materials exhibit interesting behaviours such as improved ductility and damage resistance.…”

“…Moreover, systematic thermal, structural and mechanical analysis of SPS consolidated powders with various grain sizes have been performed to shed light on SPS specific mechanisms of densification and consolidation. Post mortem analysis of specimens, which reveals non systematic partial devitrification (see for example differences in [19,22]), points out, with clear evidences, some physical events that are non observable in crystalline solids. From these investigations, we aim to approach the specific mechanisms of sintering through SPS of metallic glasses and, more generally, metallic alloys.…”

Formation and properties of two-phase bulk metallic glasses by spark plasma sintering

“…Good bonding among the Ni-and Fe-based glassy particulates is presented. The good bonding state between the glassy particulates was also confirmed by the high-resolution TEM observation [25].…”

“…Furthermore, the Fe-based BMGs exhibit excellent soft magnetic properties [23]. In a recent paper, we have reported the sinterability of the two-phase BMG samples by the SPS process at a sintering temperature of 773 K [25]. In this paper, we will focus on the effects of the sintering temperature on the microstructure and properties of the produced BMG samples.…”

Cu particulate dispersed Cu50Zr45Al5 bulk metallic glassy composite with enhanced electrical conductivity

“…Furthermore, the SPS process is a type of compression sintering technique which is similar to hot-pressing (HP) sintering process, so that the sintered specimens with the largesize and complicated shape can be easily produced [16,17]. It has been reported that the Zr-based [4,5,15], Cu-based [18,19], Fe-based [20,21], and Ni-based [3,22] BMGs were fabricated by the SPS process. Using the mixed powders of gas-atomized metallic glassy alloy powder blended with crystalline (metal or ceramic) powders, we fabricated large-size bulk GAC specimens by the SPS process.…”