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Chemical Equilibria in the Titanium(ll) Hydride‐Boron Nitride System
Author(s) -
Benko Ewa
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08233.x
Subject(s) - titanium hydride , titanium , materials science , boron nitride , boron , hydride , tin , nitride , atmospheric temperature range , argon , analytical chemistry (journal) , thermodynamics , metallurgy , chemistry , metal , layer (electronics) , nanotechnology , organic chemistry , physics
Calculations of chemical equilibria for the TiH 2 ‐BN system using the Villars, Cruise, Smith (VCS) algorithm were carried out for the 27–2027°C temperature range and the 1.3 × 10 −3 ‐1 × 10 7 Pa pressure range. Two BN:TiH 2 molar ratios were selected, 1:1 and 2:1. It follows from these studies that TiH 2 can react with BN in a very wide range of pressures and temperatures, giving new phases, namely TiB 2 , TiB, and TiN. The formation of these phases is strongly influenced by pressure‐temperature parameters. In order to verify theoretical calculations by experiment, equimolar and 2:1 BN:TiH 2 batches were prepared and heated at 1427°C under vacuum, in an argon atmosphere, and under high pressure. Phase identification carried out by X‐ray diffraction fully corroborated the computational results.