Al2O3/Cu-O composites fabricated by pressureless infiltration of paper-derived Al2O3 porous preforms

Stefan Pfeiffer, Hannes Lorenz, Zongwen Fu, Tobias Fey, Peter Greil, Nahum Travitzky

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Al2O3/Cu-O composites were fabricated from the paper-derived alumina matrix infiltrated with a Cu-3.2 wt% O alloy. Paper-derived alumina preforms with an open porosity ranging from ∼ 14 to ∼ 25 vol% were prepared by sintering of alumina-loaded preceramic papers at 1600 °C for 4 h. Pressureless infiltration at 1320 °C for 4 h of the preforms with Cu–O alloy resulted in the nearly dense materials with good mechanical and electrical properties, e.g. fracture toughness up to 6 MPa m0.5, four-point-bending strength up to 342 MPa, Young's modulus up to 281 GPa and electrical conductivity up to 2 MS/m depending on the volume fraction of copper alloy in the composites. The technological capability of this approach was demonstrated using prototypes in various engineering fields fabricated by lamination, corrugating and Laminated Object Manufacturing (LOM) methods.

Original languageEnglish
Pages (from-to)20835-20840
Number of pages6
JournalCeramics International
Volume44
Issue number17
DOIs
Publication statusPublished - 1 Dec 2018

Keywords

  • Additive manufacturing
  • Mechanical properties
  • Microstructure
  • Preceramic paper-derived ceramics
  • Pressureless metal infiltration

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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