HIGH TOUGHNESS CERAMICS AND ITS PRODUCTION

PURPOSE: To obtain ceramics having three-dimensionally isotropic strength and high toughness by disposing easily deformable ceramics or ceramics different from a reinforcing ceramic phase and a ceramic matrix phase in the coefft. of thermal expansion as an interfacial phase at the interface between...

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Bibliographic Details
Main Authors NINOMIYA NOBUO, MIYAHARA KAORU, SASA TADASHI
Format Patent
LanguageEnglish
Published 14.01.1997
Edition6
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PURPOSE: To obtain ceramics having three-dimensionally isotropic strength and high toughness by disposing easily deformable ceramics or ceramics different from a reinforcing ceramic phase and a ceramic matrix phase in the coefft. of thermal expansion as an interfacial phase at the interface between the phases. CONSTITUTION: This ceramics consists of a three-dimensionally isotropic and continuous reinforcing ceramic phase in which open pores controlled to required size have been uniformly dispersed at 50-70% porosity, an interfacial ceramic phase formed on the inner surfaces of the open pores and a ceramic matrix phase filling the voids in the interfacial ceramic phase. The base of the reinforcing ceramic phase and that of the ceramic matrix phase are preferably silicon nitride or silicon carbide. The interfacial ceramic phase is made preferably of easily deformable ceramics such as carbon or boron nitride or ceramics different from both the reinforcing ceramic phase and the ceramic matrix phase in the coefft. of thermal expansion.
Bibliography:Application Number: JP19950160284