Reaction sintered oxide-boride

Details Reaction sintered oxide-boride Reaction sintered oxide-boride

1985-06-27

1986-08-12

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 51309, C04B 3558

Patent

active

046056343

ABSTRACT:
Ceramic body formed by reaction sintering at pressures ranging from subatmospheric to superatmospheric of admixed and shaped reactants, which can be elements, compounds, intermetallic compounds and/or alloys, in stoichiometric proportions to substantially form 10-90 mole percent of boride phase or phases of one or more of elements of Groups 3b including lanthanide and actinide series elements, 4b, 5b and 6b, and 10-90 mole percent of oxide phase or phases of one or more of elements of Groups 3a, 4a, 3b, 4b, 5b, 6b and 8, and which phases have a maximum grain size substantially not greater than 15 .mu.m. Body in a form for wear resistance and corrosion-erosion resistance has a virtual absence of open porosity, e.g. not greater than 5% or less than about 3%, and a Rockwell A hardness of greater than 90.

REFERENCES:
patent: 2886537 (1959-05-01), Jackson
patent: 3143413 (1964-08-01), Krapf
patent: 3353954 (1967-11-01), Williams
patent: 4181584 (1980-01-01), Steiger et al.
patent: 4379852 (1983-04-01), Watanabe et al.
patent: 4540475 (1985-09-01), DeAngelis

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