Abstract
Abstract TiB 2 /TiC nanocomposite powder was synthesized by ball milling the industrial grade Ti powder and B 4 C powder. The results show that the milling atmosphere plays a crucial role in the synthesis of TiB 2 /TiC. After 5 h milling under an appropriate argon protection, a solid state reaction between Ti and B 4 C occurs resulting in the formation of TiB 2 /TiC phases. With increasing of the milling time, the crystal size of synthesized TiC is decreased to about 10 nm while the crystal size of TiB 2 is slightly larger. When the air is introduced in the milling process, a large amount of TiN and TiO will occur in the milled product.
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