The Characterization of Structure in Tin-Zinc Binary Eutectic Alloys Using Unidirectional Solidification

Autor:	Yasuto Goto, Masao Kurosaki, Hisao Esaka
Rok vydání:	2011
Předmět:	Materials science Metallurgy Metals and Alloys chemistry.chemical_element Zinc Condensed Matter Physics Surface tension Crystal Lamella (surface anatomy) chemistry Mechanics of Materials Soldering Materials Chemistry Tin Anisotropy Eutectic system
Zdroj:	Journal of the Japan Institute of Metals. 75:392-397
ISSN:	1880-6880 0021-4876
DOI:	10.2320/jinstmet.75.392
Popis:	The tin-zinc binary alloy is one of the candidates for lead-free solder and plating. In order to investigate the evolution of solidified structure of the tin-zinc binary eutectic alloy, the unidirectional solidification technique has been applied using a Bridgman type furnace. The primary β-tin is obtained as dendritic structure. On the other hand, the primary zinc is obtained as plate crystal because of high anisotropy in surface tension. Coupled-zone is found to be extended to tin-rich side and to be rather symmetric. The lamella spacing in coupled zone agrees with Jackson-Hunt model. Furthermore, the broken-lamellar to fibrous transition has been observed at high growth velocity.
Databáze:	OpenAIRE
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