Ultra-Low Iron Loss in Grain Oriented Silicon Steel Sheet with TiN Films Produced by CVD Method

Abstract

As a means for improving the iron loss in grain oriented silicon steel sheet, a TiN ceramic film was formed by CVD method on polished silicon steel sheet. The following results were obtained. (1) The TiN ceramic film moderately increased the magnetic flux density B 8 (T) of the silicon steel sheet by 0.009-0.012 T, while the iron loss W 17/50 (W/kg) was dramatically improved by 0.11-0.23 W/kg. This improvement in iron loss is more marked in silicon steel sheet with a higher magnetic flux density. For example, in the silicon steel sheet products with B 8 =1.93 T c W 17/50 =0.89 W/kg, the final magnetic properties after magnetic domain refinement manifested an ultra-low iron loss of 0.57 W/kg, which corresponds to an improvement in iron loss of 36%