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Metal particles in a ceramic matrix − scanning electron microscopy and transmission electron microscopy characterization
Author(s) -
KONOPKA K.
Publication year - 2006
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2006.01654.x
Subject(s) - characterization (materials science) , transmission electron microscopy , scanning confocal electron microscopy , materials science , energy filtered transmission electron microscopy , electron microscope , scanning transmission electron microscopy , conventional transmission electron microscope , scanning electron microscope , polymer characterization , ceramic , metal , microscopy , electron , matrix (chemical analysis) , electron tomography , nanotechnology , optics , composite material , physics , metallurgy , quantum mechanics
Summary This paper is concerned with ceramic matrix (Al 2 O 3 ) composites with introduced metal particles (Ni, Fe). The composites were obtained via sintering of powders under very high pressure (2.5 GPa). Scanning electron microscopy and transmission electron microscopy were chosen as the tools for the identification and description of the shape, size and distribution of the metal particles. The Al 2 O 3 –Ni composite contained agglomerates of the Ni particles surrounded by ceramic grains and nanometre‐size Ni particles located inside the ceramic grains and at the ceramic grain boundaries. In the Al 2 O 3 –Fe composite, the Fe particles were mostly surrounded by ceramic grains. Moreover, holes left by the Fe particles were found. The high pressure used in the fabrication of the composites changed the shape of the metal and ceramic powder grains via plastic deformation.