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Effect of Technological Parameters on the Profile Extrusion Process
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Board-Level Reliability of Pb-Free Surface Mounted Assemblies during Thermal Shock Testing
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Crystal-Grain Refinement of Materials under an Ultra-Strong Gravitational Field
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Crystal-Grain Refinement of Materials under an Ultra-Strong Gravitational Field

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Abstract:

In this study, we investigate the crystalline states and conditions for the grain-refinement of Bi70Sb30 (at.%) alloy. It was considered under an ultra strong gravity field, the crystals were fine-grained from the primary grain sizes of several mm to several tens of mm, and the crystal growth followed with formation of graded-composition structure due to sedimentation of atoms along the direction of gravity. It was found that for the crystal-grain refinement in Bi70Sb30 alloy the minimum gravitational field and the minimum time duration were at least 160,000 G and 10 hours, respectively at about 200 °C.

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Periodical:

Advanced Materials Research (Volumes 15-17)

Pages:

639-642

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.15-17.639

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Online since:

February 2006

Authors:

Yusuke Iguchi, H. Shibata, Y. Uchida, Xin Sheng Huang, Masao Ono, Satoru Okayasu, Tsutomu Mashimo

Keywords:

Atom Sedimentation, Atomic-Scale Gradient, Fine Grained Structure, Ultra-Strong Gravitational Field

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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