Indentation-Induced Amorphization in Mullite Single Crystals

Martin Schmücker, Hartmut Schneider, Waltraud M. Kriven

Research output: Contribution to journalArticle

Abstract

Hardness indentations with a Vickers pyramid under a load as low as 0.1 N applied at room temperature induce amorphization in single-crystal mullite when applied to the (001) crystallographic face. Different zones of damage were identified via TEM. Directly under the indenter, in the region of high-compressive stress, mullite becomes amorphous. Further out toward the matrix material, there exists a region of high plastic deformation in the form of dislocation networks, radial micro-cracks, and bend contours. The Vickers-induced damage is comparable to that produced by dynamic shock or intense ball milling of mullite.

Original languageEnglish (US)
Pages (from-to)1821-1822
Number of pages2
JournalJournal of the American Ceramic Society
Volume86
Issue number10
DOIs
StatePublished - Oct 2003

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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