Abstract
The sintering behavior of titanium–titanium nitride nanocomposite powders has been investigated by dilatometry. Micron-sized titanium powders of average particle size of ∼12μm and nano sized titanium nitride powders of average particle size of ∼50nm were used to produce two compositions of Ti–8wt%TiN and Ti–15wt%TiN by physical mixing and ultrasonification. Dilatometry was carried out by constant rate of heating (10°C/min) to various temperatures in the range of 650–1250°C followed by isothermal holding for 1h. The effect of nano TiN dispersion on the sintering onset temperature, linear shrinkage, shrinkage rate, activation energy, and microstructure of titanium was investigated. The sintering of titanium–titanium nitride nanocomposites was found to be influenced by the sintering between the Ti–Ti contacts (self diffusion), Ti–TiN contacts (diffusion of N into Ti), TiN–TiN contacts, the role of oxygen as well as the α–β transformation in titanium.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
