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Rapid Nondiffusional Penetration of Oxide Melts along Grain Boundaries of Oxide Ceramics
Author(s) -
Belousov Valery V.
Publication year - 1999
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.1151-2916.1999.tb01920.x
Subject(s) - ceramic , grain boundary , materials science , oxide , kinetic energy , liquid phase , penetration (warfare) , grain growth , mineralogy , chemical physics , grain size , metallurgy , chemical engineering , composite material , thermodynamics , microstructure , chemistry , classical mechanics , physics , operations research , engineering
Interaction of the liquid phase with the grain boundaries of solids and a rapid mass transport in solids were studied in the present work with a CuO ceramic melt of the Bi 2 O 3 system as an example. Anomalously rapid penetration of the liquid phase along the grain boundaries of a solid ceramic material was observed. The velocity and activation energy of the process were each determined. A mechanism for the development of a grain‐boundary liquid channel in the kinetic mode, when the channel growth rate is reaction‐limited, was proposed. This mechanism leads to the formation of a liquid‐channel grain‐boundary structure (LGBS) in solids. It was demonstrated that liquid can interact with one‐dimensional as well as two‐dimensional defects in solids.