Influence of the simultaneous processes of scale evaporation and reaction surface reduction on the oxidation kinetics of chromia-forming alloys doped with rare-earth elements
pdf (English)

Ключевые слова

Oxidation of alloys
evaporation of scale
decrease of reaction surface

Как цитировать

Nakhutsrishvili, I. ., Kokhreidze, R. ., & Kakhniashvili, G. . (2022). Influence of the simultaneous processes of scale evaporation and reaction surface reduction on the oxidation kinetics of chromia-forming alloys doped with rare-earth elements. Georgian Scientists, 4(3), 141–146. https://doi.org/10.52340/gs.2022.04.03.17

Аннотация

The high-temperature oxidation of FeCr(La) and Cr(Ce) alloys was studied by thermogravimetry. The kinetic dependence of the FeCr(La) mass change has a specific form due to the simultaneous occurrence of scale evaporation and reduction of the reaction surface. The latter is due to the formation of diffusion barriers from lanthanum chromite. The kinetic dependence of the mass change of Cr(Ce) has an identical form. Based on this identity, it was suggested that diffusion barriers can also exist in the Cr(Ce) alloy, as is the case for the FeCr(La) alloy.

https://doi.org/10.52340/gs.2022.04.03.17
pdf (English)

Библиографические ссылки

Y.Liang, L.V.Haotian, W.Chunlei, G.Qianming, C.Hao, Z.Chi, Y. Zhigang Mechanism of reactive element effect – oxide pegging Acta Metallurg. Sin., (34) 2021, pp. 182-190

N.K.Othman, A.Jalar, N.Othman, D.J.Young Effect of lanthanum on Fe-25Cr alloys under cyclic oxidation Adv. Mater. Res., (97/101) 2010, pp.1212-1215

O.Mikadze,I.Nakhutsrishvili,N.Maisuradze,G.Mikadze Kinetic regularities of growth of scale on heat resisting alloys with barrier layers of stable qxides Metallofiz. Noveish. Tekhnolog. (Metallophysics and Advanced Technologies), (29)2007, pp. 1507-1513.

M.F.Pillis, O.V.Correa, L.V. Ramanathan High-temperature corrosion behavior of yttrium dioxide coated Fe-20Cr alloy Materials Res., (19)2016, pp. 611-617

D.A.Downham, R.J.Hussey, D.F.Mitchell, M.J.Graham Segregation of cerium in chromia scales Prooc. Int. Symp. on high-temperature oxidation and sulphidation processes Hamilton, Ontario, Canada, 1990, aug.26-30, pp.101-106

I.Nakhutsrishvili Some formal aspects of Tedmon's kinetics: Growth and sublimation of Ge3N4 Technical Sci. and Technologies, (5)2016, pp.19-22

Лицензия Creative Commons

Это произведение доступно по лицензии Creative Commons «Attribution-NonCommercial-NoDerivatives» («Атрибуция — Некоммерческое использование — Без производных произведений») 4.0 Всемирная.

Скачивания

Данные скачивания пока недоступны.

Метрики

Загрузка метрик ...