Characterisation of metal/mould interface on investment casting of γ-TiAl

J. Barbosa, H. Puga, C. S. Ribeiro, O. M. N. D. Teodoro, A. C. Monteiro

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

This paper describes the evaluation of different refractory compounds - SiO 2 , ZrO 2 and Y 2 O 3 - as face coats of investment casting shells for γ-TiAl. The effect of the different refractories on the metal-mould interaction is studied in different aspects. Experimental results include characterisation of the constituents present at the metal/ mould interface, the segregation profiles of residual elements, namely oxygen, from the interface to the inner part of the samples, the extension and microhardness of the samples external hard case and the samples surface finishing.

Original languageEnglish
Pages (from-to)331-338
Number of pages8
JournalInternational Journal Of Cast Metals Research
Volume19
Issue number6
DOIs
Publication statusPublished - 1 Dec 2006

Keywords

  • Ceramic crucible
  • Ceramic mould
  • Graphite
  • Investment casting
  • Silica
  • TiAl
  • Yttria
  • Zirconia

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