yes we can fab thoriated tungsten. but i do not believe it is available in flat sheet form. why do you want to use thoriated.
as far as the diamond, we can deposite cvd dlc. also why do you want a diamond coating. in my experience they make poor emitters at medium-low vacuums.
sincerely,
daniel preston
Created on Saturday, December 16, 2000 3:20 PM EDT by Daniel Preston