Stability of α''-Fe16N2 in hydrogenous atmospheres

Shinpei Yamamoto; Ruwan Gallage; Seiji Isoda; Yasunobu Ogata; Yoshihiro Kusano; Naoya Kobayashi; Tomoyuki Ogawa; Naoaki Hayashi; Migaku Takahashi; Mikio Takano

doi:10.1039/c4cc01839g

Stability of α''-Fe16N2 in hydrogenous atmospheres

Chem Commun (Camb). 2014 Jul 7;50(53):7040-3. doi: 10.1039/c4cc01839g. Epub 2014 May 22.

Authors

Shinpei Yamamoto¹, Ruwan Gallage, Seiji Isoda, Yasunobu Ogata, Yoshihiro Kusano, Naoya Kobayashi, Tomoyuki Ogawa, Naoaki Hayashi, Migaku Takahashi, Mikio Takano

Affiliation

¹ Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida Ushinomiya, Sakyo, Kyoto 606-8501, Japan. yamamoto@icems.kyoto-u.ac.jp.

PMID: 24849002
DOI: 10.1039/c4cc01839g

Abstract

We revealed the inherent instability of α''-Fe16N2 in hydrogenous atmospheres due to the denitrification toward α-Fe by forming NH3 at the particle surface. Coating the particle surface with SiO2 to suppress the formation of NH3 has proven to be a simple yet powerful method to enhance the stability of α''-Fe16N2 in hydrogenous atmospheres.