Microstructure of Face Centered Cubic (fcc) <scp> <scp>TiB</scp> </scp> Powder Synthesized by Boronizing of <scp> <scp>Ti</scp> </scp> Powder

Abstract

High resolution transmission electron microscopy ( HRTEM ) and X‐ray diffraction ( XRD ) techniques were used to examine the crystal structure of TiB ceramic powder synthesized by a Ti ‐Boronizing method. The HRTEM analysis revealed that the synthesized titanium boride has fcc crystal structure, with titanium and boron atoms alternatively arranged like Na and Cl ions in NaCl ‐type lattice. The crystal structure of this boride phase, denoted as fcc‐ TiB in the paper, was confirmed also by XRD analysis and agrees with the data reported in the card PDF # 06‐641. This card is present in the powder diffraction file ( PDF ) database, but seldom quoted in literature because the typical crystal structure of TiB that forms in situ as a phase is orthorhombic. The present work reports new experimental data on the crystal properties of pure fcc‐ TiB not yet reported in the literature. The lattice parameter of fcc‐ TiB , calculated from XRD analysis, is a 0 =4.245 Å.