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Formation of Zirconia Solid Solutions Containing Alumina Prepared by New Preparation Method
Author(s) -
Ishida Koji,
Hirota Ken,
Yamaguchi Osamu,
Kume Hideki,
Inamura Suguru,
Miyamoto Hiroki
Publication year - 1994
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.1151-2916.1994.tb05425.x
Subject(s) - solid solution , hot isostatic pressing , materials science , microstructure , cubic zirconia , amorphous solid , ceramic , hot pressing , composite number , chemical engineering , mineralogy , analytical chemistry (journal) , crystallography , composite material , metallurgy , chemistry , organic chemistry , engineering
In the system ZrO 2 –Al 2 O 3 , a new method for preparing ZrO 2 solid solutions from ZrCl 4 and AlCl 3 using hydrazine monohydrate is investigated. c ‐ZrO 2 solid solutions containing up to ∼40 mol% Al 2 O 3 crystallize at low temperatures from amorphous materials. The formation mechanism is discussed from IR spectral data. The values of the lattice parameter α increase linearly from 0.5072 to 0.5105 nm with increasing Al 2 O 3 content. At higher temperatures, transformation of the solid solutions proceeds as follows: c ( SS ) → t ( ss ) → t ( ss ) +α‐Al 2 O 3 → m +α‐Al 2 O 3 . m ‐ZrO 2 –α‐Al 2 O 3 composite ceramics are fabricated by hot isostatic pressing for 2 h at 1250°C and 196 MPa. Microstructures and mechanical properties are examined, in connection with increasing Al 2 O 3 content.