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Investigations of NiO‐CuO Solid Solutions Using Transmission Electron Microscopy: I, Tweed Microstructure
Author(s) -
DAVIES P. K.
Publication year - 1986
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.1151-2916.1986.tb07362.x
Subject(s) - microstructure , transmission electron microscopy , diffraction , materials science , non blocking i/o , phase (matter) , crystallography , solid solution , electron diffraction , mineralogy , optics , analytical chemistry (journal) , chemistry , composite material , metallurgy , nanotechnology , physics , biochemistry , organic chemistry , chromatography , catalysis
Compositions in the apparent one‐phase rock salt solid solution region of the system (Ni x Cu 1–x )O have been investigated using transmission electron microscopy. Diffraction and imaging experiments were conducted on compositions ranging from ×= 0.65 up to ×= 0.95. All the samples showed strong “tweed” contrast characterized by striations parallel to the traces of (110) planes. Diffraction patterns also exhibited <110> diffuse streaking associated with the tweed effect. It is proposed that the tweed microstructure is due to strain contrast resulting from strain centers associated with the formation of a tetragonally distorted phase. The observation of this complex microstructure supports previous thermodynamic predictions of nonideal behavior in this system.