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Chem Commun (Camb). 2014 Jul 07;50(53):7040-3. doi: 10.1039/c4cc01839g. Epub 2014 May 22.

Stability of α''-Fe16N2 in hydrogenous atmospheres.

Chemical communications (Cambridge, England)

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

Affiliations

  1. Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida Ushinomiya, Sakyo, Kyoto 606-8501, Japan. [email protected].

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.

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