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Knjižnica tehniških fakultet, Maribor (KTFMB)
  • Development of Cu-C composite microstructure [Elektronski vir]
    Rudolf, Rebeka ; Anžel, Ivan, inženir metalurgije in materialov ; Kosec, Borut
    The aim of the present research was to produce a discontinuous Cu-C composite with the submicron dispersion of graphite particles. The samples of the Cu-C composite were produced by two different ... techniques: (i) the sintering of powders, and (ii) the internal carbonisation of rapidly solidified pure copper. The results of microstructural investigation show that the use of the mechanical alloying and sintering of consolidated powders is an inappropriate way to achieve a submicron dispersion of the graphite particles. During the mechanical mixing of powder an intensive agglomeration of C-particles occurred. The tendency was inversely proportional to the initial size of graphite particles. The degree of agglomeration determines a distribution of graphite on the volume of matrix. The greater initial size of the C-particles (lower degree of agglomeration) increases the fraction of the uniform distribution of the C-particles, while at higher degree of agglomeration the priority of C-particles distributed along the boundary increases. During the cold pressing the microstructure evolution depends on two mechanisms, which consequently influence the bimodal distribution of graphite in the cold pressed samples. Graphite agglomerates are spread along the boundary, while in the dispersed C-particles imprinted in the surface of Cu-particles the sliding of C-layers took place. Consequently, the spherical morphology of graphite changes to bar morphology. On the other hand, the combination of rapid solidification and internal carbonisation was found to be an efficient technique to obtain the requested microstructure.
    Vir: Metalni i nemetalni materijali [Elektronski vir] : proizvodnja, osobine, primjena : zbornik radova = Metallic and nonmetalic materials : production, properties, application : proceedings (Str. 195-200)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2008
    Jezik - angleški
    COBISS.SI-ID - 12291606

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