Patent ID: 7578424

Claim:
A method of joining a ceramic, microwave transparent component to a nonceramic host comprising: applying a Titanium-Tungsten (TiW) coating to the microwave transparent component; applying a metal layer over the TiW coating; and brazing the microwave transparent component to the host, wherein the step of brazing the ceramic component to the nonceramic component includes a thermal cycle as set forth below; heat to 1000 deg. F +/− 15 deg. F at a rate of 25 deg. F/minute or slower, hold for 15 minutes; heat to 1500 deg. F +/− 15 deg. F at a rate of 25 deg. F/minute or slower, hold for 15 minutes; heat to 1900 deg. F +/− 15 deg. F at a rate of 25 deg. F/minute or slower, hold for 15 minutes; heat to a brazing temperature of 2100 deg. F +/− 15 deg. F at a rate of 25 deg. F per minute or slower, hold for 15 minutes; cool to a diffusion temperature of 1975 deg. F +/− 15 deg. F at a rate of 10 deg. F/min or slower, hold for a diffusion time of 4 hours; cool to 1800 deg. F +/− 15 deg. F at a rate of 10 deg. F/min or slower, hold for 30 minutes; cool to 1600 deg. F +/− 15 deg. F at a rate of 10 deg. F/min or slower, hold for 30 minutes; cool to 1400 deg. F +/− 15 deg. F at a rate of 10 deg. F/min or slower, hold for 30 minutes; cool to 1200 deg. F +/− 15 deg. F. at a rate of 10 deg. F/min or slower, hold for 30 minutes; cool to 1000 deg. F +/− 15 deg. F at a rate of 10 deg. F/min or slower, hold for 30 minutes; cool to room temperature at any convenient rate.