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Effect of Processing on Microstructure and Mechanical Behavior of Magnesium Oxide
Author(s) -
SWEETING TRUETT B.,
PASK JOSEPH A.
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.tb10939.x
Subject(s) - microstructure , materials science , annealing (glass) , grain boundary , graphite , metallurgy , composite material , magnesium , grain size , oxide , crystallite , pressing
Polycrystalline MgO specimens were fabricated from two powders by hot‐pressing in graphite or alumina dies and annealing in air, in vacuum, or within the graphite die in vacuum. Parameters affected were density, grain size, and visual appearance, which was considered to be dependent on grain boundary structure. The formation of a boundary liquid phase with one type of powder tended to eliminate the effect of the processing variables. The character (microstructure) of the specimens was correlated with their mechanical behavior in compression at a constant strain rate at 1200°C.