Fabrication of ZrCuAlNi Metallic Glassy Matrix Composite Containing ZrO<SUB>2</SUB> Particles by Spark Plasma Sintering Process

Abstract

Using a mixed powder of argon gas-atomized Zr 55 Cu 30 Al 10 Ni 5 metallic glassy alloy powder blended with 10 vol% ZrO 2 powder, Zr 55 Cu 30 Al 10 Ni 5 bulk metallic glassy matrix composite was fabricated by a spark plasma sintering process. The structure, thermal stability and mechanical properties of the sintered bulk metallic glassy matrix composite were investigated. The ZrO 2 particles were homogeneously dispersed in the Zr 55 Cu 30 Al 10 Ni 5 glassy matrix. No crystallization of the glassy matrix occurred during the spark plasma sintering process. The crystallization behavior of the sintered composite was similar to that of the metallic glassy powder. The sintered composite specimen exhibited larger plastic ductility than that of the as-cast Zr 55 Cu 30 Al 10 Ni 5 glassy alloy rod specimen. The increase in the plastic ductility is proposed to originate from the structural inhomogeneity caused by the ZrO 2 ceramic particles.

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

“…2. We have demonstrated in our previous studies that the crystallization of Zr-and Ni-based BMGs and their composites was avoided upon the SPS process [14,17,18,30,31]. The significant viscous flow deformation under high pressure at a proper temperature and a certain holding time promotes effective diffusion from one to another glassy phase, and results in continuous connection between the glassy phases (Fig.…”

Microstructure and mechanical properties of crystalline particulates dispersed Ni-based metallic glassy composites fabricated by spark plasma sintering

“…The disappointingly poor plasticity limits the extensive practical applications of BMGs. In order to overcome this problem, a method which is to introduce nano-or micro-scale crystalline phases into the metallic glassy matrix leading to the formation of multiple shear bands and an enhanced plasticity has been proposed [6][7][8][9][10][11][12][13][14]. Some attempts have been carried out: such as inclusion of nanoscale compound particles dispersed in the glassy matrix via thermal treatment [15], adding particles or fibers during casting or consolidation process [9][10][11][12], and in situ formed ductile phase precipitates [13,14].…”

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.…”