Stereological observations of platelet-reinforced mullite- and zirconia-matrix composites

Isaac K. Cherian, Mitchell D. Lehigh, Ian Nettleship, Waltraud M Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Recently, the effect of solid inclusions on the sintering of ceramic powders has been explained in terms of a "back-stress" that opposes densification. Several analyses have been proposed to describe this problem. However, little quantitative information exists concerning the effect of reinforcement on microstructural evolution. This study compares the microstructural development of zirconia and mullite matrices in the presence of alumina platelets. The effect of platelet loading on density is similar for both composites. Quantitative stereological examinations reveal that the average grain size and pore size are finer for the zirconia-matrix composite. The platelet loading does not have any noticeable effect on the average grain size of the matrix in either composite. However, the average pore size increases as the volume fraction of platelets increases for both materials. Contiguity measurements have detected some aggregation of platelets in the zirconia-matrix composite.

Original languageEnglish (US)
Pages (from-to)3273-3281
Number of pages9
JournalJournal of the American Ceramic Society
Volume79
Issue number12
DOIs
StatePublished - Dec 1996

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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