Investigation of the latent heat associated with the solidification of an Al-TiB2 composite

Y.M. Youssef, R.J. Dashwood, P.D. Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Differential scanning calorimetry was used to measure the latent heat evolved or absorbed during solidification or melting of a composite made from commercial-purity aluminium reinforced with TiB2 particulate. The measured latent heat was up to 10% less than that expected assuming a rule of mixtures. The analysis of the particles revealed that up to 20 at.% of Ti is substituted by Al in the boride. The concomitant increase in volume fraction of particulate (Al3Ti) and the associated reduction in Al accounted for the latent heat discrepancy. It was previously suggested that strain energy could explain the discrepancy; however, X-ray and neutron diffraction stress measurements showed that this is unlikely.
Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalMaterials Science and Engineering A
Volume391
Issue number1-2
Early online date17 Nov 2004
DOIs
Publication statusPublished - 25 Jan 2005

Keywords

  • Latent heat
  • Aluminium–TiB2
  • Particulate metal–matrix composites

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