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Bor esaslı ve bileşiklerin elektro-deoksidasyon yöntemi ile oksitlerinden doğrudan üretimi

A study is carried out into the possibility of synthesizing TiBAl and Fe-4.6%B directly from their oxides. Of these TiBAl is a grain refiner used for casting of aluminum and aluminum alloys and Ti-4.6%B is a soft magnetic material used for transformer core or for other similar applications. The alloys were synthesized using the method of electro-deoxidation for which B2O3 and the other related oxides were used as the starting material. For this purpose, oxides were mixed in the right proportions and were sintered at temperatures around 900 °C. The oxide mixture connected to current collector as cathode were electrolyzed in a molten salt (CaCl2) maintained at 850 °C using a graphite anode. It has been shown that the synthesis of Ti-TiB is possible from their oxides, but the composition which are richer in B such as TiB2 ,i.e. the active ingredient in TiBAl is not possible for the conditions employed in this work. The use of a salt which has much lower melting point than CaCl2 would be necessary for the synthesis of TiB2 or TiBAl. For the latter alloy, the electrodeoxidation, with parameters used in the present work, yielded the composition Fe-4.6%B. The deoxidation was achieved by mixing the boric acide with Fe2O3 which were then sintered at 900 °C electrolysed in CaCl2 at 850 °C .The process yielded Fe-4,6%B powder in crystalline form. The study have demonstrated that the synthesis of boron bearing compounds are possible with processes which can be implemented on a smaller scale than the conventional ones.