Long-Range Ordered Structure of Ti-B-C-N in a TiB_2-TiC_xN_(1-x) Eutectic Composite

摘要

A TiB_2-TiC_xN_(1-x) quasi-binary eutectic composite, with a rod-like faceted texture and a long-range ordered structure of Ti-B-C-N, was prepared by the arc-melting of TiB_2, TiC, and TiN powders. Hexagonal single-crystalline TiC_xN_(1-x) rods were grown in a single-crystalline TiB_2 matrix with a crystal orientation relationship of TiB_2 (1120)//TiC_xNi_(1-x) (202) and TiB_2 [0001]//TiC_xN_(1-x) [111]. A long-range ordered structure of Ti-B-C-N was formed by the intermixing of the coherent interplanar spacings of seven TiB_2 (0001) and nine TiC_x N_(1-x) (111) planes.