Journal article

Activation mechanism and infiltration kinetic for pressureless melt infiltration of Ti activated Al₂O₃ preforms by high melting alloy

  • Vasi, Srdan Technical Mineralogy Group, Institute of Mineralogy and Petrography, University of Fribourg Switzerland - Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for High Performance Ceramics Duebendorf, Switzerland
  • Grobéty, Bernard Technical Mineralogy Group, Institute of Mineralogy and Petrography, University of Fribourg Switzerland
  • Kuebler, Jakob Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for High Performance Ceramics Duebendorf, Switzerland
  • Graule, Thomas Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for High Performance Ceramics Duebendorf, Switzerland
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    02.08.2009
Published in:
  • Advanced Engineering Materials. - 2009, vol. 11, no. 8, p. 659 - 666
English The infiltration mechanism of X3CrNi13-4 in titanium activated porous alumina preforms has been studied. Investigations revealed isolated steel-covered titanium particles beyond the infiltration front. The only transport path possible for the steel to form such wetted islands is through the gas phase. Supersaturation due to the mixing of the steel gas phase with the titanium rich gas phase over the activator particle surfaces is proposed as condensation mechanism. Progressive condensation leads to the formation of a melt network, which serves as pathway for the original steel melt to infiltrate the preforms and to fill the remaining pore space in the non-wetting X3CrNi13-4/Ti-Al₂O₃ sytem.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Mineralogy
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301227
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