Cooling Process and Cast Structure of Zr-Al-Ni-Cu–Based Bulk Metallic Glasses Produced in Various Atmospheres View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2010-10-19

AUTHORS

J. Saida, A. D. Setyawan, H. Kato, A. Inoue

ABSTRACT

Cooling process in the production of Zr65Al7.5Ni10Cu17.5-based bulk metallic glasses (BMGs) was investigated in various chamber atmospheres in Cu mold casting. Two different cooling modes, consisting of the direct heat transfer between the melt and Cu mold in the high temperature and indirect transfer via cavity in the low-temperature regions, are suggested. In the later case, the cooling effect should depend on the chamber atmosphere, which results in the formation of glassy structure with large relaxation enthalpy casting under the ambient Ar and He atmospheres due to a good thermal conductivity. The less relaxed BMGs produced by an improved cooling effect are also expected to contain a large amount of free volume for significant deformability. Actually, it is clarified that the compressive plastic deformation is improved with an increase of the relaxation enthalpy. The present study indicates a necessity of development of the glassy structure, i.e., relaxation state, and provides a new technique of the formation of less relaxed glassy structure for the improvement of plasticity in BMGs. More... »

PAGES

1450-1455

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11661-010-0444-7

DOI

http://dx.doi.org/10.1007/s11661-010-0444-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044829623


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