I ran a google search on nitride and silver nitride, apparently it is similar to the process used to make mirrors, there are warnings about the explosive properties of the solutions used, so I don't think you want to be doing this at home. this site tells you more than you want to know about nitrides
http://en.wikipedia.org/wiki/Nitride

Jim

I learn something every day, and a lot of times it's that what I learned the day before was wrong