Defect structure in single crystal titanium carbide

Abstract

The defects and crystallinity of as-grown and annealed TiCx (grown by the high-pressure float-zone) were examined by TEM and double crystal x-ray rocking curves. Three types of subboundaries and planar defects within subgrains were observed in as-grown TiCx. Subboundaries are classified by structure as (i) wide-extended, fault-like defects (WEFLD's), (ii) edge dislocation arrays, and (iii) dislocation networks. Planar defects were observed at dislocation nodes of subboundaries and also within subgrains; this is the first reported observation of planar defects within TiCx subgrains. The misorientation and/or density of subgrains in TiCx was reduced significantly by annealing at 2300 °C in contact with graphite.

Transmission electron microscopy observations of twin boundaries and sub-boundary networks in bulk CdZnTe crystals

“…4(a). We identify it as sub-boundary networks, according to the results of Hirsch et al and Zhao et al [17,18]. The observation of more subgrains in the critical neck region of CdZnTe crystals provides us a possible explanation on the origin of the sub-boundary networks.…”

Mechanisms of TiB2 and graphite nucleation during TiC–B4C high temperature interaction

“…13b); (iii) shift Ti plates. It is well known [28,29], that titanium carbide is always carbon deficient (from 2 to 40% of the carbon atoms are absent in TiC crystals), thus the first step can start with migrating boron being captured in the carbon vacancies. To make first step in understanding of TiC lattice behavior in the case of boron accumulation along (111) planes we employed computer modelling.…”

Formation of nanocrystalline TiC from titanium and different carbon sources by mechanical alloying

“…It has a very high melting point (3373 K) and does not decompose or undergo phase transformations in any temperature range of interest [1]. It has metallic characteristics (luster and metallic conductivity), extraordinary hardness and toughness, and excellent resistance to wear, abrasion and infusibility.…”