Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Topological instability and electronegativity effects on the glass-forming ability of metallic alloys

2008; Taylor & Francis; Volume: 88; Issue: 11 Linguagem: Inglês

10.1080/09500830802375622

1362-3036

Walter José Botta Filho, Flavio Soares Pereira, Claudemiro Bolfarini, Cláudio Shyinti Kiminami, Marcelo Falção de Oliveira,

Cultural Heritage Materials Analysis

The glass-forming ability (GFA) of metallic alloys is associated with a topological instability criterion combined with a new parameter based on the average electronegativity difference of an element and its surrounding neighbours. In this model, we assume that during solidification the glassy phase competes directly with the supersaturated solid solution having the lowest topological instability factor for a given composition. This criterion is combined with the average electronegativity difference among the elements in the alloy, which reflects the strength of the liquid. The GFA is successfully correlated with this combined criterion in several binary glass-forming systems.