In situ preparation of alumina particle reinforced aluminum matrix composites by powder matallurgy

Kenzo Fukaura, Hisakichi Sunada, Yoshihiko Yokoyama, Kazushige Kidena

Research output: Contribution to journalArticlepeer-review

Abstract

Two kinds of CuO/Al composites and TiO2/Al composite were prepared by powder meturllagy involves hot pressing. Afterward, structures and hardness changes were investigated by means of Electron Probe Micro Analyzer, X-ray diffraction equipment and Vickers hardness tester. In the case of 3mass%CuO/Al composites, CuO was deoxidized by aluminum during heating at 823K, as a result, Cu dissolved into aluminum matrix and CuO particles are gradually replacing Al2C3 particles on in-situ manner. Consequently Al2O3/Al composite was made and it revealed age hardning by isothermal heat treatment. On the other hand, 10mass%CuO/Al composite, intermetallic compound Al2Cu was formed in the matrix due to excessive amount of Cu atoms. In the case of TiO2/Al composite, since Ti atoms diffused toward aluminum matrix, detrimental Al3Ti were formed in the aluminum matrix and at the same time TiO2 was transformed into Al2O3.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume44
Issue number2
DOIs
Publication statusPublished - 1997 Feb

Keywords

  • Aluminum matrix composites
  • Hot pressing
  • In-situ precipitate
  • Powder metallurgy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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