Properties and microstructure of Ni-alumina composite materials prepared by the sol/gel method

E. Breval, G. Dodds, Carlo G. Pantano

Research output: Contribution to journalArticle

46 Scopus citations


Sol-gel techniques have been used to make mm-size pieces of Ni-alumina gels for abrasive use. The microstructure was studied extensively by electron microscopy methods and by electron and x-ray diffraction. The hardness, stiffness, and toughness were measured by indentation methods. Seeding of the gel with small additions of nm-size α-Al2O3 grains resulted in enhanced α-Al2O3 crystallization, a denser structure and better mechanical properties. The best Ni-alumina gel specimens had hardnesses and stiffnesses comparable to successful abrasive products and even better fracture toughnesses.

Original languageEnglish (US)
Pages (from-to)1191-1205
Number of pages15
JournalMaterials Research Bulletin
Issue number10
StatePublished - Jan 1 1985


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this