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Thermal stability and decomposition of nanostructural iron nitrides made by reactive ball milling of iron in ammonia

Journal Article


Abstract


  • Thermal stability and thermally induced decomposition of nanostructural iron nitrides made by reactive ball milling of iron in ammonia were investigated. Phase transformations during the decomposition process were characterised by x-ray diffractometry, Mossbauer spectroscopy and thermal gravimetry. The effect of ammonia pressure on end milling product was also investigated. It was found that nanostructural γ'-Fe4N and ε-Fe3N can be produced by reactive milling and that the volume of each phase in the as milled sample depends on ammonia pressure. Nanostructural γ'-Fe4N made by reactive ball milling decomposes at a lower temperature than micro/macro-crystalline γ'-Fe4N powder made by conventional methods. The ε-Fe3N phase is slightly more stable than γ'-Fe4N.

Publication Date


  • 1999

Citation


  • Brzózka, K., Gawronski, M., Jezuita, K., Szumiata, T., Wexler, D., & Calka, A. (1999). Thermal stability and decomposition of nanostructural iron nitrides made by reactive ball milling of iron in ammonia. Materials Science Forum, 312, 475-480. doi:10.4028/www.scientific.net/msf.312-314.475

Scopus Eid


  • 2-s2.0-2442721429

Web Of Science Accession Number


Start Page


  • 475

End Page


  • 480

Volume


  • 312

Abstract


  • Thermal stability and thermally induced decomposition of nanostructural iron nitrides made by reactive ball milling of iron in ammonia were investigated. Phase transformations during the decomposition process were characterised by x-ray diffractometry, Mossbauer spectroscopy and thermal gravimetry. The effect of ammonia pressure on end milling product was also investigated. It was found that nanostructural γ'-Fe4N and ε-Fe3N can be produced by reactive milling and that the volume of each phase in the as milled sample depends on ammonia pressure. Nanostructural γ'-Fe4N made by reactive ball milling decomposes at a lower temperature than micro/macro-crystalline γ'-Fe4N powder made by conventional methods. The ε-Fe3N phase is slightly more stable than γ'-Fe4N.

Publication Date


  • 1999

Citation


  • Brzózka, K., Gawronski, M., Jezuita, K., Szumiata, T., Wexler, D., & Calka, A. (1999). Thermal stability and decomposition of nanostructural iron nitrides made by reactive ball milling of iron in ammonia. Materials Science Forum, 312, 475-480. doi:10.4028/www.scientific.net/msf.312-314.475

Scopus Eid


  • 2-s2.0-2442721429

Web Of Science Accession Number


Start Page


  • 475

End Page


  • 480

Volume


  • 312