摘要: The widespread interest in silicon nitride ceramics stems from their desirable physical and mechanical properties many high temperature pressure applications [1, 2, 3, 4, 5]. Good resistance to oxidation corrosive environments, low coefficient of friction thermal expansion, negligible creep, decomposition are some these important properties. Because these, (especially its polymorph) is widely used gas turbines, engine parts, bearings, dental drills gauges, cutting tools. In addition, thin films coatings have been studied relation high-speed memory devices [6, 7, 8, 9, 10] optical waveguide [11].