Unexcepted low-temperature crystallization of amorphous silicon nitride into a-Si3N4 in a ferritic Fe--Si matrix

Hugo P. van Landeghem (1, 2) , Mohamed Gouné (3, 4, 1) , Thierry Epicier (5) , Abdelkrim Redjaïmia (2, 1)

1 Labex DAMAS
2 IJL - Institut Jean Lamour
3 ArcelorMittal Maizières Research SA
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
5 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

Annealing conditions leading to the crystallization of amorphous silicon nitride occurring upon nitriding of Fe-Si alloys have been found. A brief thermodynamic explanation for the occurrence of this unexpected amorphous-to-crystal transition is given. The crystalline precipitates were found to be α-Si3N4 and follow the orientation relationship given...

Mots clés: Crystallization; Nitrides; Nitriding; Iron alloys; Precipitation

Domaines: Matériaux

Hugo P. van Landeghem, Mohamed Gouné, Thierry Epicier, Abdelkrim Redjaïmia. Unexcepted low-temperature crystallization of amorphous silicon nitride into a-Si3N4 in a ferritic Fe--Si matrix. Scripta Materialia, 2013, 68 (3-4), pp.187-190. ⟨10.1016/j.scriptamat.2012.10.014⟩. ⟨hal-00757533⟩