Nanocrystalline coating are prepared using a two step approach. First, the grain size of: micrometer sized powders is reduced to nanometer dimensions using high energy ball milling. This is undertaken using attritor mills. Second, the nanocrystalline powders are dried and introduced into the high velocity...http://www.google.de/patents/US5939146?utm_source=gb-gplus-sharePatent US5939146 - Method for thermal spraying of nanocrystalline coatings and materials for the same
