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Mechanical Properties and Chemical Reactivity in Mullite—Glass Systems
Author(s) -
STUDT PERRY L.,
FULRATH RICHARD M.
Publication year - 1962
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.1151-2916.1962.tb11117.x
Subject(s) - mullite , borosilicate glass , materials science , composite material , hot pressing , phase (matter) , wetting , volume fraction , mineralogy , chemistry , ceramic , organic chemistry
Mullite‐glass systems were studied by vacuum hot‐pressing sized mullite crystal particles with known glass compositions. During the hot‐pressing at relatively low temperatures, significant chemical reactivity was observed between mullite and a soda borosilicate glass. This reaction led to the precipitation of a silica‐rich crystalline phase in the glass matrix and to a change in the mullite structure as evidenced by the X‐ray diffraction pattern. Wetting studies at elevated temperatures indicated an interfacial chemical reaction. The modulus of rupture increased when the second crystalline phase was present. Increased volume fraction of the crystalline phase and development of a stronger interfacial bond between mullite and glass may be the primary factors responsible for the increase in mechanical strength.