Direct bonding of AlN and graphite by spark plasma sintering

• OKUNI Tomoyuki

  Advanced Carbon Technology Center, Toyo Tanso Co., Ltd. Joining and Welding Research Institute, Osaka University

• MIYAMOTO Yoshinari

  Advanced Carbon Technology Center, Toyo Tanso Co., Ltd. Joining and Welding Research Institute, Osaka University

• ABE Hiroya

  Joining and Welding Research Institute, Osaka University

• NAITO Makio

  Joining and Welding Research Institute, Osaka University

Abstract

AlN powders were simultaneously sintered and bonded to isotropic graphite disks at temperatures of 1800 and 1900°C under 30 MPa by spark plasma sintering (SPS). The effects of temperature and Y₂O₃ additive content on the bonding strength were investigated. The bonding mechanism is proposed as follows: as the temperature increases, a molten Al–Y–O phase forms and flows into the open pores of graphite. As the material cools, a Al₂Y₄O₉ phase forms, resulting in a physical bond between the graphite and AlN. The bonding strength of AlN/graphite increased with an increase of temperature and Y₂O₃ content. When 10 mass % Y₂O₃ was used as a sintering additive, the bonding strength of AlN/graphite reached 19 MPa at 1900°C.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 121 (1413), 448-451, 2013

  The Ceramic Society of Japan

Keywords

• Aluminum nitride
• Graphite
• Bonding
• Spark plasma sintering

Details

• CRID: 1390001205286278272
• NII Article ID: 130004480141
• DOI: 10.2109/jcersj2.121.448
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/121/1413/121_JCSJ-P12263/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed