ABSTRACT
This chapter concerns the adiabatic properties of fourteen exothermic metal–boron systems and those of the Ti-B4C and Ti-C systems as well. Systems like these have been used in self-propagating high-temperature synthesis or SHS processes. These reactions produce refractory boride compounds. Reactive metals of interest include magnesium (Mg), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), and aluminum (Al). Notable products include the titanium borides TiB and TiB2 as well as zirconium diboride, ZrB2. The thermochemical descriptions within this chapter were derived from the FactPS and FToxid databases of FactSage 7.0. Each section contains one or two general figures as well as written descriptions of certain fuel-to-oxidizer ratios. Temperature points describe features and points of interest along adiabatic temperature profiles. Similarly, gas points refer to adiabatic gas production profiles. Some adiabatic temperature charts contain flat regions where the adiabatic temperature remains constant despite variations in the stoichiometry of the system. Some of these temperature plateaus are described and explained.
