TY - JOUR
T1 - Precipitation of MgO·nAl2O3 in Mg-doped α-Al2O3 under electron irradiation
AU - Kaneko, Kenji
AU - Kato, Takeharu
AU - Kitayama, Mikio
AU - Tomokiyo, Yoshitsugu
PY - 2003/1
Y1 - 2003/1
N2 - A number of nanoscale precipitates with random orientations were produced by electron irradiation of polycrystalline Mg-doped α-Al2O3. The precipitation behavior and microstructural changes were observed using in situ high-resolution transmission electron microscopy. A ring pattern corresponding to a polycrystalline fee structure was obtained from the region of these precipitates by selected-area diffraction, and they were identified as nonstoichiometric MgO·nAl2O3. It is believed that Al2O3 with MgO(ss) and/or MgO at the grain boundaries is effectively stabilized by the electron irradiation process, forming the fundamental structure of MgO·nAl2O3. The average size of the precipitates is about 10 nm.
AB - A number of nanoscale precipitates with random orientations were produced by electron irradiation of polycrystalline Mg-doped α-Al2O3. The precipitation behavior and microstructural changes were observed using in situ high-resolution transmission electron microscopy. A ring pattern corresponding to a polycrystalline fee structure was obtained from the region of these precipitates by selected-area diffraction, and they were identified as nonstoichiometric MgO·nAl2O3. It is believed that Al2O3 with MgO(ss) and/or MgO at the grain boundaries is effectively stabilized by the electron irradiation process, forming the fundamental structure of MgO·nAl2O3. The average size of the precipitates is about 10 nm.
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U2 - 10.1111/j.1151-2916.2003.tb03295.x
DO - 10.1111/j.1151-2916.2003.tb03295.x
M3 - Article
AN - SCOPUS:0037231861
VL - 86
SP - 161
EP - 168
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 1
ER -