Process of forming a ceramic article containing a core comprising zirconia and a shell comprising zirconium boride
AssigneeEastman Kodak Company
InventorsGregory S. Jarrold, Dilip K. Chatterjee, Syamal K. Ghosh
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Abstract
A method for preparing a ceramic composite having a core/bulk of tetragonal zirconia alloy and a shell/surface comprising zirconium boride by sintering a zirconia or zirconia and alumina composite article in an argon atmosphere while in contact with boron carbide.
Claims26
A method for preparing an electrically conductive ceramic article having a core/bulk of tetragonal zirconia alloy and a shell/surface comprising zirconium boride comprising:
- i. coating a zirconia or zirconia alloy green body with a boron carbide slurry;
- and
- ii. sintering in an argon atmosphere at between 1200.degree. C. to 1600.degree. C.
A method for preparing an electrically conductive ceramic article having a core/bulk of tetragonal zirconia alloy and a shell/surface comprising zirconium boride comprising:
- i. coating sintered tetragonal zirconia or a zirconia alloy article with boron carbide;
- and
- ii. reacting in an argon atmosphere at between 1200.degree. C. to 1600.degree. C.
Dependencies are inferred from the claim text.