Fabrication and Mechanical Properties of Al2O3/LaPO4 Composite

Y. Konishi, T. Kusunose, P. E.D. Morgan, T. Sekino, K. Niihara

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Al2O3/LaPO4 ceramic composites were prepared from lanthanum nitrate hexahydrate, diammonium hydrogenphosphate and Al2O3 mixed in aqueous solution. Prepared powders were in-situ reaction sintered by hot-pressing at 1400°C for 1 h. The conventional reaction sintering using simple powder mixture of α-Al2O3, lanthanum carbonate and aluminum dihydrogenphosphate was also carried out for the comparison of the microstructure and mechanical properties. X-ray diffraction analyses showed that the sintered bodies were composed of only α-Al2O3 and LaPO4. The more fine-grained composites fabricated by using aqueous solution process indicated the enhanced mechanical properties compared with the composites from reaction synthesis process.

Original languageEnglish
Pages (from-to)341-344
Number of pages4
JournalKey Engineering Materials
Volume161-163
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Alumina
  • Aqueous Solution Process
  • Lanthanum Phosphate
  • Microstructure
  • Reaction Synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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