Ceramic Particulate Reinforced Zr<SUB>55</SUB>Cu<SUB>30</SUB>Al<SUB>10</SUB>Ni<SUB>5</SUB> Metallic Glassy Matrix Composite Fabricated by Spark Plasma Sintering

Abstract

Two-type sintered specimens of Zr 55 Cu 30 Al 10 Ni 5 glassy alloy powder blended with and without 10 vol% ZrO 2 ceramic powder, which had the similar relative density, were fabricated by a spark plasma sintering process in order to clarify the reinforced mechanical effect of ZrO 2 particulates in the metallic glassy matrix composite. The structure, thermal stability and mechanical properties of the two-type sintered specimens were investigated. Two-type sintered specimens as well as original metallic glassy powder exhibited similar thermal stability. No crystallization of the metallic glassy matrix was demonstrated during the spark plasma sintering process. The plastic ductility of the sintered Zr 55 Cu 30 Al 10 Ni 5 glassy matrix composite was enhanced by adding the ZrO 2 particulates into the metallic glassy alloy. The improvement was originated from the structural inhomogeneity caused by the micro particles inclusion.

Amorphous Metals

“…Physical Properties References: (1) Inoue et al (2003), (2) Inoue and Zhang (2004) Chen, D. et al (2007), (15) Yuan et al (2005), (16) Xu et al (2005), (17) Na et al (2006), (18) Yao et al (2007), (19) Liu, L. et al (2005), (20) Wright et al (2001), (21) Schroers and Johnson (2001), (22) Ma et al (2004), (23) Xie et al (2007), (24) Conner et al (1998), (25) Choi-Yim, et al (2002. a E: Young's modulus, σ y : yield strength, σ f : fracture strength, ε y : strain at yielding, ε p : plastic strain.…”

Production of Bulk Metallic Glasses by Severe Plastic Deformation

“…A solution for producing bulk metallic glasses from not so stable metallic glass compositions is to produce metallic glass powder and form the bulk metallic glass in an additional step. Severe plastic deformation (SPD) can be this additional step [11,12] as well as a powder metallurgy process [13][14][15]. SPD techniques were used in the past to obtain ultra-fine grained (ufg) and nanocrystalline (nc) specimens [16][17][18][19].…”