Pressureless Melt Infiltrated Non-Oxide Ceramic-Metal Composites

Kalemtas A., Arslan G., Kara F.

2nd International Symposium on SiAIONs and Non-Oxides, Mie, Japan, 2 - 05 December 2007, vol.403, pp.251-252 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 403
  • Doi Number: 10.4028/
  • City: Mie
  • Country: Japan
  • Page Numbers: pp.251-252
  • Keywords: SiC, B(4)C, Al(4)C(3), Si(3)N(4), pressurless infiltration, ALUMINUM
  • Anadolu University Affiliated: Yes


In the present study highly dense (open porosity < 1 %), light-weight (d <= 2.85 g/cm(3)) and Al(4)C(3)-free non-oxide ceramic-metal composites were produced at comparatively low temperatures (<= 1250 degrees C) by pressurless melt infiltration. Phase analysis of the SiC-B(4)C-Al composites revealed that a significant amount of hygroscopic Al(4)SiC(4) and Al(4)C(3) phases were formed. Si(3)N(4) powder was added in different amounts to the SiC-B(4)C powder batches to suppress formation of these phases via in-situ reactions during the infiltration process. X-ray diffraction results of the SiC-B(4)C-Si(3)N(4)-Al composites confirmed that the incorporation of Si(3)N(4) to the SiC-B(4)C system reduced or eliminated the formation of the hygroscopic phases and resulted in in-situ formation of AlN, SiC and Si phases in the composite.