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Sol–Gel Processed Y‐PSZ Ceramics with 5 wt% Al 2 O 3
Author(s) -
Tu Gan Feng,
Sui Zhi Tong,
Huang Qiang,
Wang Chang Zhen
Publication year - 1992
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.1151-2916.1992.tb04183.x
Subject(s) - materials science , tetragonal crystal system , cubic zirconia , ceramic , fracture toughness , sol gel , metastability , mineralogy , toughening , reducing atmosphere , toughness , composite material , analytical chemistry (journal) , chemical engineering , metallurgy , crystallography , crystal structure , chemistry , nanotechnology , chromatography , organic chemistry , engineering
Y‐PSZ ceramics with 5 wt% Al 2 O 3 were synthesized by a sol–gel route. Experimental results show that powders of metastable tetragonal zirconia with 2.7 mol% Y 2 O 3 and 5 wt% Al 2 O 3 can be fabricated by decomposing the dry gel powder at 500°C. Materials sintered in an air atmosphere at 1500°C for 3 have high density (5.685 g/cm 3 ), high content of metastable tetragonal zirconia (>96%), and high fracture toughness (8.67 MPa.m 1/2 ). Compared with the Y‐PSZ ceramics, significant toughening was achieved by adding 5 wt% Al 2 O 3 .