In-situ study of the process of self-propagating high-temperature synthesis of titanium carbide with a nichrome binder

In this work, first experimental results of an in-situ study of self-propagating high-temperature synthesis of titanium carbide with a nichrome binder have been obtained. As the initial powder components, Ti(56)-C(14)-NiCr(30) (wt %) have been chosen. The results of time-resolved X-ray diffraction of the phase formation process of the composition under study are presented. Based on the study, it has been found that an exothermic reaction of titanium with soot occurs in the course of SHS, which leads to the melting of the NiCr metal powder. It has been shown that the NiCr metal binder is inert to the initial components and synthesis products. It has been found that the metal binder changes its stoichiometry after melting and subsequent crystallization. To determine the stoichiometry of the resulting alloy, a practical implementation of the linear dependence of Vegard's law was presented. Based on the plotted dependences, it was found that the metal binder has the following modification Ni66.397Cr33.603 with the unit cell parameter a = 3.5534 angstrom.

Automated summary

Experimental results show that during the self-propagating high-temperature synthesis of titanium carbide with a nichrome binder, the metal binder undergoes melting and subsequent crystallization, leading to a change in its stoichiometry.