- Tytuł:
- Kinetics of nanocrystalline iron nitriding
- Autorzy:
-
Arabczyk, W.
Zamłynny, J.
Moszyński, D. - Powiązania:
- https://bibliotekanauki.pl/articles/778372.pdf
- Data publikacji:
- 2010
- Wydawca:
- Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
- Tematy:
-
azotki żelaza
materiały mikroporowate
synteza chemiczna
analiza termograwimetryczna
dyfrakcja promieniowania rentgenowskiego
iron nitrides
microporous materials
chemical synthesis
thermogravimetric analysis
X-ray diffraction - Opis:
- Nitriding of nanocrystalline iron was studied under the atmosphere of pure ammonia and in the mixtures of ammonia - hydrogen - nitrogen at temperatures between 350°C and 500°C using thermogravimetry and x-ray diffraction. Three stages of nitriding were observed and have been ascribed to the following schematic reactions: (1) α-Fe → γ-Fe4N, (2) γ- Fe4N → ε - Fe3N and (3) ε - Fe3N → ε - Fe2N. The products of these reactions appeared in the nitrided nanocrystalline iron not sequentially but co-existed at certain reaction ranges. The dependence of a reaction rate for each nitriding stage on partial pressure of ammonia is linear. Moreover, a minimal ammonia partial pressure is required to initiate the nitriding at each stage.
- Źródło:
-
Polish Journal of Chemical Technology; 2010, 12, 1; 38-43
1509-8117
1899-4741 - Pojawia się w:
- Polish Journal of Chemical Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł