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Titolo:
ON THE EFFECT OF MATRIX RELAXATION DURING THE MELTING OF EMBEDDED INDIUM PARTICLES
Autore:
MALHOTRA AK; VANAKEN DC;
Indirizzi:
UNIV MISSOURI,DEPT MET ENGN,218 MCNUTT HALL ROLLA MO 65401
Titolo Testata:
Philosophical magazine. A. Physics of condensed matter. Defects and mechanical properties
fascicolo: 5, volume: 71, anno: 1995,
pagine: 949 - 964
SICI:
0141-8610(1995)71:5<949:OTEOMR>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
AL MATRIX; NUCLEATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
A.K. Malhotra e D.C. Vanaken, "ON THE EFFECT OF MATRIX RELAXATION DURING THE MELTING OF EMBEDDED INDIUM PARTICLES", Philosophical magazine. A. Physics of condensed matter. Defects and mechanical properties, 71(5), 1995, pp. 949-964

Abstract

The melting transformation of micron-sized (1-20 mu m 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 degrees C was observed for particles embedded in thegrain interiors, whereas particles situated at high-angle boundaries melted at the equilibrium temperature. The relative contributions frominterfacial surface energy and strain energies resulting from thermalexpansion 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.

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Documento generato il 05/07/20 alle ore 11:13:02