Premium
Densification of Nanocrystalline Yttria by Low Temperature Spark Plasma Sintering
Author(s) -
Yoshida Hidehiro,
Morita Koji,
Kim ByungNam,
Hiraga Keijiro,
Kodo Masayasu,
Soga Kohei,
Yamamoto Takahisa
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02337.x
Subject(s) - spark plasma sintering , nanocrystalline material , materials science , sintering , yttria stabilized zirconia , grain size , metallurgy , composite material , ceramic , cubic zirconia , nanotechnology
We investigated the densification of undoped, nanocrystalline yttria (Y 2 O 3 ) powder by spark plasma sintering (SPS) at sintering temperatures between 650°C and 1050°C at a heating rate of 10°C/min and an applied stress of 83 MPa. In spite of the low sinterability of the undoped Y 2 O 3 , a remarkable densification of the powder started at about 600°C, and a theoretical density of more than 97% was achieved at a sintering temperature of 850°C with a grain size of about 500 nm. The low temperature SPS is effective for fabricating dense Y 2 O 3 polycrystals.