Heterogeneous nucleation of pb particles embedded in a Zn matrix

Goswami, R and Chattopadhyay, K and Kim, WT and Cantor, B (1992) Heterogeneous nucleation of pb particles embedded in a Zn matrix. In: Metallurgical Transactions. Physical Metallurgy and Material, 23 (12). pp. 3207-3218.

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Abstract

Zinc-10 and 20 wt pct Pb alloys have been rapidly solidified by melt spinning to obtain a very fine scale dispersion of nanometer-sized Pb particles embedded in Zn matrix. The microstructure and crystallography of the Pb particles have been studied using transmission electron microscopy (TEM). Each embedded Pb particle is a single crystal, with a truncated hexagonal biprism shape with the 6/mmm Zn matrix point group symmetry surrounded by and { 0001 á },\text { \text10[`\text1] \text0 },\text and { \text10[`\text1] \text1 }0001 1010 and 1011 facets. The Pb particles solidify with a well-defined orientation relationship with the Zn matrix of ( 0001 )Zn ||(111)Pb\text and\text [ \text11[`\text2] \text0 ]Zn| ||[ 1[`1] 0 ]Pb 0001Zn(111)Pb and 1120Zn110Pb . The melting and solidification behavior of the Pb particle have been studied using differential scanning calorimetry (DSC). The Pb particles solidify with an undercooling of approximately 30 K, by heterogeneous nucleation on the {0001} facets of the surrounding Zn matrix, with an apparent contact angle of 23 deg.

Item Type:	Journal Article
Publication:	Metallurgical Transactions. Physical Metallurgy and Material
Publisher:	Minerals Metals Materials Soc
Additional Information:	Copyright of this article belongs to Minerals Metals Materials Soc.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Apr 2011 09:22
Last Modified:	29 Feb 2012 07:54
URI:	http://eprints.iisc.ac.in/id/eprint/36153

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