Variations in processing, microstructure and properties of Al/Al2O3 composites fabricated by displacement reaction

Noboru Yoshikawa, Singo Funahashi, Atsushi Kikuchi, Shoji Taniguchi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In order to supply variations in mechanical properties to Al/Al2O3 composites by displacement reaction between SiO2 and molten Al, two processes was attempted to fabricate the modified composites. The first process was to infiltrate Al melt into a partially sintered SiO2 preform and Al/Al2O3 composites were obtained. Molten Al infiltrated into some pores in the preform, which formed thick Al channels in the composite bodies. The mechanical property changed from dutile to brittle, depending on the thickness of these Al channels, which was related to the sintering temperature of SiO2 preforms. Al-Cu/Al2O3 composites were fabricated by reaction between molten Al-Cu alloy and SiO2. The hardness increased 1.5 times by aging the specimens. Fine precipitates were observed in Al parts in the composite bodies. Their mechanical properties were discussed in relation with the microstructure.

Original languageEnglish
Pages (from-to)32-39
Number of pages8
JournalInternational Journal of Materials and Product Technology
Volume16
Issue number1-3
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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