The B−Ti (Boron-Titanium) system

Preparation of titanium diboride TiB2 by spark plasma sintering at slow heating rate

“…In contrast to some information in the literature [14], a homogeneity range for TiB 2 could not be detected by measuring the unit-cell parameters on SPS-treated samples with the starting atomic composition Ti x B 100Àx (27oxo45) at 1500 1C.…”

Thermodynamic Analysis of the Nb–Ti–B Ternary Phase Diagram

“…According to the critical assessment by Murray et al, 12) the equilibrium phase diagram of the Ti-B binary system contains the liquid (L) phase, terminal solutions of Ti ((Ti) and ) and B (B), and three intermetallic compounds, namely the TiB, Ti 3 B 4 , and TiB 2 phases. The TiB phase has an orthorhombic FeB-type structure (Pnma), and its homogeneity range is narrow with a range of about 49 to 50 mol% B.…”

“…17) The peritectictype reaction between the , Ti and TiB phases occurs at around 1157 K. 12,15,17) The TiB phase forms from the melt by , takes place at the slightly higher temperature of 2473 K, 12) and the two peritectic reactions are separated by 20 K. The TiB 2 phase melts congruently; however, the experimental melting points showed some scattering in the range 3063-3498 K, possibly caused by vaporization. 16) Murray et al 12) pointed out that the major difficulty of determining the melting temperature was due to the reaction with the crucible material, which results in the detection of a ternary eutectic temperature …”

“…16) Murray et al 12) pointed out that the major difficulty of determining the melting temperature was due to the reaction with the crucible material, which results in the detection of a ternary eutectic temperature …”

Phase Equilibria in the Ternary System Titanium–Boron–Carbon: The Sections TiCy–TiB2and B4Cy–TiB2

“…A high-temperature phase Ti B was claimed to be stable in a narrow temperature interval, between 2100 and 2400 K (11). According to the (12)(13)(14), a rhombohedral boride Ti B forms up to the temperatures 2400-2500 K. No ternary compounds have been found to exist in the Ti-B-C system. The characteristic isothermal reactions for the Ti-B-C ternary system are compiled in Table 1, including the pseudobinary sections TiB -C, TiC W -TiB , and B C W -TiB .…”