Investigation of the clustering behaviour of titanium diboride particles in aluminium

I. G. Watson, M. F. Forster, P. D. Lee, R. J. Dashwood, R. W. Hamilton, A. Chirazi

    Research output: Contribution to journalArticlepeer-review


    The clustering of reinforcement particles in cast metal matrix composite (MMC) material has a number of deleterious effects on its mechanical properties and castability. In order to better understand this phenomenon, the clustering behaviour of TiB2 particles in molten commercial purity aluminium was investigated. A novel method of sampling the melt was developed in order to investigate the clustering behaviour as a function of holding time at 700 °C. The initially clustered distribution of TiB2 became increasingly dispersed with increased holding time. The maximum observed cluster size decreased from 50 to 10 μm after a holding period of 73 h. X-ray microtomography (XMT) and SEM micrograph analyses were carried out to quantify the rate of dispersion of the clusters. XMT was shown to be a powerful tool for visualizing and quantifying 3-dimensional features within the MMC microstructure. © 2005 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)1177-1187
    Number of pages10
    JournalComposites Part A: Applied Science and Manufacturing
    Issue number9
    Publication statusPublished - Sept 2005


    • A. Metal-matrix composites CMMCs
    • A. Particle-reinforcement
    • B. Microstructure
    • X-ray Microtomography (XMT)


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