Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Reexamination Certificate
2008-07-17
2009-06-23
Group, Karl E (Department: 1793)
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
C501S096300, C089S036020
Reexamination Certificate
active
07550401
ABSTRACT:
A method of making a sintered ceramic composition includes the steps of: providing a powder that includes at least 50 wt. % boron carbide and 0.05 wt. % to 30 wt. % of at least one oxide selected from oxides of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy Ho, Er, Tm, Yb, and Lu; milling the powder to form a milled powder; drying the milled powder to form a milled, dried powder; and consolidating the milled, dried powder at a temperature in the range of 1500° C. to 2200° C. to form a sintered ceramic composition having a density of at least 90% of theoretical density, the sintered ceramic composition including zirconium diboride in an amount in the range of 1 wt. % to 10 wt. %.
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Group Karl E
Marasco Joseph A.
UT-Battelle LLC
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