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Fabrication, Microstructure, and Mechanical Properties of Cr2O3/ZrO2(2.5Y) Composite Ceramics in the Cr2O3‐Rich Region
Author(s) -
Takano Yoshihiko,
Komeda Tetsuya,
Yoshinaka Masaru,
Hirota Ken,
Yamaguchi Osamu
Publication year - 1998
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.1151-2916.1998.tb02652.x
Subject(s) - spark plasma sintering , materials science , composite number , ceramic , microstructure , fracture toughness , composite material , fabrication , sintering , flexural strength , amorphous solid , cubic zirconia , chemistry , crystallography , medicine , alternative medicine , pathology
Intimate mixtures of Cr 2 O 3 /ZrO 2 (2.5Y) in the Cr 2 O 3 ‐rich region are produced at low temperatures from amorphous materials prepared by the hydrazine method. Spark plasma sintering (SPS) has been performed for 10 min at 1300°C and 30 MPa. Composite ceramics with homogeneously dispersed fine ZrO 2 (0.2 µm) give 99.8% of theoretical densities. Their mechanical properties are examined in connection with increased ZrO 2 content. A high fracture toughness of 9.3 MPam 1/2 and an excellent bending strength of 1290 MPa are achieved in the composite ceramics containing 50 mol% ZrO 2 .