Effect of Spark Plasma Sintering on Densification, Mechanichal Properties and Micro-structure of Alumina Ceramics

Nobuyuki Tamari; Isao Kondoh; Takahiro Tanaka; Masakazu Kawahara; Masao Tokita; Yukio Makino; Shoji Miyake

doi:10.2497/jjspm.46.816

Nobuyuki Tamari, Isao Kondoh, Takahiro Tanaka, Masakazu Kawahara, Masao Tokita, Yukio Makino, Shoji Miyake

Author information

Keywords: Spark-plasma-sintering, Alumina ceramics, Densification, Mechanical properties, Micro-structure

JOURNAL FREE ACCESS

1999 Volume 46 Issue 8 Pages 816-819

DOI https://doi.org/10.2497/jjspm.46.816

Details

Abstract

Alumina ceramics were fabricated by spark-plasma-sintering (SPS) and hot-pressing at 1100 to 1600°C under 30 MPa for 5 min. The room temperature mechanical properties were measured. The SPS brought about dense alumina ceramics at a sintering temperature lower than that in the hot-pressing. The alumina ceramics obtained by SPS had strength, hardness and fracture toughness higher than those by hot-pressing. The alumina grains in the sintered bodies prepared by SPS grew larger than those by hot-pressing.

Corresponding author

Register with J-STAGE for free!