Isostructural Phase Transition of TiN Under High Pressure

TL;DR

This study investigates TiN under high pressure using synchrotron x-ray diffraction, revealing a possible isostructural phase transition around 7 GPa indicated by a volume discontinuity.

Contribution

First experimental evidence of an isostructural phase transition in TiN under high pressure using in situ synchrotron x-ray diffraction.

Findings

Discontinuity in V/V0 at ~7 GPa suggests phase transition.

High-pressure behavior of TiN characterized up to 30.1 GPa.

Potential implications for material properties under extreme conditions.

Abstract

In situ high-pressure energy dispersive x-ray diffraction experiments on polycrystalline powder TiN with NaCl-type structure have been conducted with the pressure up to 30.1 GPa by using the diamond anvil cell instrument with synchrotron radiation at room tempearture. The experimental results suggested that an isostructural phase transition might exist at about 7 GPa as revealed by the discontinuity of V/V0 with pressure.