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Surface Segregation of Aluminum (Spinel Precipitation) in MgO Crystals
Author(s) -
KINGERY W. D.,
ROBBINS W. L.,
HENRIKSEN A. F.,
JOHNSON C. E.
Publication year - 1976
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.1151-2916.1976.tb10943.x
Subject(s) - spinel , microprobe , precipitation , aluminium , materials science , electron microprobe , analytical chemistry (journal) , secondary ion mass spectrometry , surface (topology) , mineralogy , ion , metallurgy , chemistry , chromatography , physics , organic chemistry , meteorology , geometry , mathematics
MgO single crystals containing 0.006 and 0.187 wt% Al in solid solution at 1850°C were quenched and slow cooled. Analysis of the Al distribution near the surface with ion microprobe mass analysis indicated an increased Al concentration and near‐surface precipitation within a region × to 4 μ thick in the slow‐cooled samples and a much smaller enhanced concentration in the region 0.1 to 0.2 μ from the surface in the quenched samples.