Ceramic nanocomposites prepared via the in situ formation of a novel TiZrN2 nanophase in a polymer-derived Si3N4 matrix - Archive ouverte HAL Access content directly
Journal Articles Journal of the European Ceramic Society Year : 2022

Ceramic nanocomposites prepared via the in situ formation of a novel TiZrN2 nanophase in a polymer-derived Si3N4 matrix

Abstract

The first demonstration of a nanoscaled titanium zirconium nitride (TiZrN2) single-phase isolated during the preparation of polymer-derived silicon nitride (Si3N4) matrix nanocomposites is discussed. We employed a polysilazane, which was chemically modified with Zr[N(CH2CH3)2]4 and Ti[N(CH3)2]4 then ammonolyzed before a pyrolysis step under ammonia (1000 °C) and a heat-treatment in flowing nitrogen (1000–1700 °C). Based on a careful control of the precursor chemistry in the early stage of the process and nano-/microstructural investigations of the material performed during its preparation, we were able to identify TiZrN2 nanocrystals with a size as low as 9 nm distributed in α- and β-Si3N4 phases at a temperature as low as 1500 °C. We particularly proved that the TiZrN2 nanophase could be generated because of the use of the polysilazane evoluting towards a covalently-bonded Si3N4 matrix . This unique nanostructure is expected to provide particular functionality to Si3N4 as noble metal-free catalysts and components with high plasmonic quality.
Fichier principal
Vignette du fichier
1-s2.0-S0955221922002680 <HAL>.pdf (1.84 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03660914 , version 1 (06-05-2022)

Identifiers

Cite

Mirna Chaker Bechelany, Abhijeet Lale, Maxime Balestrat, Christel Gervais, Sylvie Malo, et al.. Ceramic nanocomposites prepared via the in situ formation of a novel TiZrN2 nanophase in a polymer-derived Si3N4 matrix. Journal of the European Ceramic Society, 2022, 42 (10), pp.4172-4178. ⟨10.1016/j.jeurceramsoc.2022.04.006⟩. ⟨hal-03660914⟩
58 View
21 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More