flyrotary@lancaironline.net Mailing List Archive

Ernest Christley wrote: Aluminized Titanium Nitride Titanium Nitride is the gold-tone stuff you see on a lot of the "better" drill bits, of late. ...and it is a composite. http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TX9-3Y9R495-9&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_version=1&_urlVersion=0&_userid=10&md5=35836ae642150db699b54dcb20a66a6d That's one application. The ceramic has up to 10% TiAlN content. I was thinking more along the lines of a PVD coating. Often applied with LASER assistance, the coating (plating?) is typically .0001" to .0002" in thickness. (Yes, that's _"tenths"_.) The Al component - or more properly, the AlN component - improves the heat transfer qualities. TiN has an interesting property, in that the molecules are pretty nearly round - they act like little bearings. Dale R.