Process for metal coating boron nitride objects
Abstract
Abstract DISCLOSED IS A PROCESS FOR METAL COATING BORON NITRIDE OBJECTS CONTAINING LESS THAN 0.1 PERCENT BORIC OXIDE. THE PROCESS INVOLVES VACUUM DEGASSING AT A TEMPERATURE OF FROM 200* TO 250* C. AT A PRESSURE NO GREATER THAN ABOUT 4.0X10**-6 TORR AND HEATING THE BORON NITRIDE OBJECT TO A TEMPERATURE OF AT LEAST ABOUT 200* C. UNDER AN INERT GAS PRESSURE NO GREATER THAN ABOUT 2.5X10**-2 TORR. WHILE MAINTAINING THE REDUCED PRESSURE AND ELEVATED TEMPERATURE, BERYLLIUM IS ION PLATED UPON THE OBJECT TO FORM A BORON NITRIDE-BERYLLIUM COMPOSITE. THE METAL COATING IS THEN DEPOSITED UPON THE BORON NITRIDE-BERYLLIUM COMPOSITE BY CONVENTIONAL MEANS TO FORM A BORON NITRIDE/BERYLLIUM/METAL MATRIX.
Inventors
- 👤 R Kurtz
- 👤 Vorous T Van
Bibliographic Details
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