FeNiB-based metallic glasses with fcc crystallisation products

• Published in: Journal of non-crystalline solids Vol. 304; no. 1; pp. 44 - 50
• Main Authors: Yavari, A.R., Botta Filho, W.J., Rodrigues, C.A.D., Greer, A.L., Uriarte, J.L., Huenen, G., Vaughan, G., Inoue, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2002; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Growth from solid phases (including multiphase diffusion and recrystallization); Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Methods of crystal growth; physics of crystal growth; Physics; M190; M120; C290; A196; Scanning electron microscopy; FCC lattices; Nickel alloys; Ruptures; Crystallization; Embrittlement; Iron alloys; XRD; Plastic deformation; Hardness; Experimental study; Boron alloys; Multi-element alloys; Fracture toughness; Glass transition; Metallic glasses; Transmission electron microscopy; Cobalt alloys; Transition element alloys; Zirconium alloys
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/S0022-3093(02)01002-5

Bulk metallic glasses (MGs) are currently subject of intense research due to their unique mechanical properties: Newtonian viscous formability between the glass transition temperature T g and crystallisation temperature T x and elastic strain range of well over 1% below T g. However, some MGs are brittle. Fe-based MGs and some others are prone to thermal embrittlement even during the quench. Compositional adjustments in the design of FeB-based alloys have allowed preparation of metalloid poor Fe 40Co 5Ni 35Zr 5B 15 that has γ-Fe as a primary crystallisation product for obtaining ductility of metallic glass-matrix toughened by γ-Fe crystallisation. Structural characterisation using diffraction of high energy synchrotron light, transmission electron microscopy, scanning electron microscopy are presented together with hardness and wear data.