Abstract
The formation of titanium nitride with rock salt structure (δ-TiN x ) was studied by mechanical milling of a mixture of Ti and hexagonal boron nitride (h-BN) powders and isothermal annealing of the mixture after milling for 70 h under argon atmosphere. The mole ratio of Ti to h-BN is 22:78. In the milling process, an amorphous Ti–N alloy was formed firstly by a diffusion reaction between Ti and BN, and then the amorphous Ti–N alloy transformed into δ-TiN x driven by mechanical milling. However, in the annealing process, a Ti(N) solid solution was formed firstly by incorporation of N into Ti, and the N content in the Ti(N) increased with increasing annealing temperature. When the N content exceeded the solubility limit of the Ti(N) at some annealing temperature, the Ti(N) decomposed into δ-TiN x and Ti(N) with the solubility limit. No self-sustaining reaction occurs in the present work. No TiB 2 is observed to form in the two processes. The thermodynamic and kinetic mechanisms of formation of the δ-TiN x are discussed.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
