On the Effect of Matrix Relaxation during the Melting of Embedded Indium Particles
Abstract
The melting transformation of micron-sized (1-20 pm in diameter) indium particles embedded in an aluminium matrix has been studied using differential scanning calorimetry. An average elevation in the melting-temperature of 4°C was observed for particles embedded in the grain interiors, whereas particles situated at high-angle boundaries melted at the equilibrium temperature. The relative contributions from interfacial surface energy and strain energies resulting from thermal expansion mismatch and a volume change upon transformation to the melting-temperature were calculated. It was shown that the volume transformation stress upon melting was the major factor in causing the melting-temperature elevation. The difference between the melting behaviour of the embedded and the grain-boundary inclusions was related to differences in the rate of stress relaxation associated with the formation of the liquid nuclei. Volume changes at the grain-boundaries were rapidly accommodated by diffusional processes, whereas the matrix behaved in a rigid manner with respect to particles embedded in the grain interiors. © 1995 Taylor & Francis Group, LLC.
Recommended Citation
A. K. Malhotra and D. C. Van Aken, "On the Effect of Matrix Relaxation during the Melting of Embedded Indium Particles," Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, vol. 71, no. 5, pp. 949 - 964, Taylor and Francis Group; Taylor and Francis, Jan 1995.
The definitive version is available at https://doi.org/10.1080/01418619508236230
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0141-8610
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Taylor and Francis Group; Taylor and Francis, All rights reserved.
Publication Date
01 Jan 1995
Comments
Office of Naval Research, Grant 94-5-1 894