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Grain‐Boundary Cavitation and Bloating of Isostatically Hot‐Pressed Magnesia‐Partially‐Stabilized Zirconia on Air Annealing
Author(s) -
HOGG C. L.,
STRINGER R. K.,
SWAIN M. V.
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.tb07418.x
Subject(s) - materials science , annealing (glass) , hot isostatic pressing , graphite , cubic zirconia , metallurgy , grain boundary , carbide , cavitation erosion , extrusion , composite material , cavitation , sintering , ceramic , microstructure , physics , mechanics
Commercially sintered magnesia‐partially‐stabilized zirconia was densified to near theoretical density by isostatic hot‐pressing at 200 MPa and 1700°C in argon. Subsequent air annealing above 1100°C resulted in bloating of the material due to grain‐boundary cavitation. Mass spectrometry of crushed samples detected the evolution of CO 2 and possibly CO on annealing; the hot‐pressed material showed a sudden gas evolution above 1400°C. Preliminary Auger and ESCA analysis identified the presence of carbon as graphite and an undefined carbide in both the sintered and the hot‐pressed material.