Synthesis of cubic zirconium(IV) nitride, c-Zr3N4, in the 6–8 GPa pressure region

Takashi Taniguchi (1) , Dmytro Dzivenko (2) , Ralf Riedel (2) , Thierry Chauveau (3) , Andreas Zerr (3)

1 NIMS - National Institute for Materials Science
2 Fachbereich Material- und Geowissenschaften
3 LSPM - Laboratoire des Sciences des Procédés et des Matériaux

We report on the lowermost pressure and temperature conditions where cubic zirconium(IV) nitride having Th3P4-type structure, c-Zr3N4, forms in a belt-type apparatus. This novel hard material having exceptional wear resistance by machining of low-carbon steels appears at pressures between 6.5 and 7.7 GPa when heated to 1400–1600 °C. Single-phase samples were obtained at P = 7.7 GPa thus indicating that the industrial scale synthesis of this innovative material is feasible. Chemical reaction of the sample material with the Pt-capsule led to formation of a Pt–Zr alloy, as a minor admixture, which can potentially be used as a binder for cementing of polycrystalline c-Zr3N4 tools.

Mots clés: Nitrides; Powders: solid state reaction; Hot pressing; X-ray methods; High-pressure high-temperature synthesis; hard materials

Domaines: Matériaux; Cristallographie; Chimie inorganique

Takashi Taniguchi, Dmytro Dzivenko, Ralf Riedel, Thierry Chauveau, Andreas Zerr. Synthesis of cubic zirconium(IV) nitride, c-Zr3N4, in the 6–8 GPa pressure region. Ceramics International, 2019, 45 (16), pp.20028-20032. ⟨10.1016/j.ceramint.2019.06.263⟩. ⟨hal-02316920⟩