TY - JOUR

T1 - The study of Nickel product morphology developed during the gaseous reduction of Nickel oxide

AU - Skrypnik, A. S.

AU - Matvienko, A. A.

PY - 2017

Y1 - 2017

N2 - The effects of temperature and hydrogen partial pressure on porous nickel morphology during the low-temperature (T<500°C) reduction of bulk nickel oxide were studied. It was shown that during the reduction process of nickel oxide at 300°C in an atmosphere of pure hydrogen nickel metal thin plates assembled into bundles and separated by cracks were formed. Increasing the reaction temperature up to 500°C led to a significant change in the morphology of the metal and formation of a porous cellular structure with a mesh size of about 0.1-0.2 μm. Decrease of hydrogen partial pressure led to growth of metal mesh cells and transition from the plate-like to the cellular morphology at 300°C. It was shown, that both increasing the surface diffusion of metal atoms and decreasing the surface reaction rate led to a change from the plate-like to the cellular morphology and the growth of the cell size.

AB - The effects of temperature and hydrogen partial pressure on porous nickel morphology during the low-temperature (T<500°C) reduction of bulk nickel oxide were studied. It was shown that during the reduction process of nickel oxide at 300°C in an atmosphere of pure hydrogen nickel metal thin plates assembled into bundles and separated by cracks were formed. Increasing the reaction temperature up to 500°C led to a significant change in the morphology of the metal and formation of a porous cellular structure with a mesh size of about 0.1-0.2 μm. Decrease of hydrogen partial pressure led to growth of metal mesh cells and transition from the plate-like to the cellular morphology at 300°C. It was shown, that both increasing the surface diffusion of metal atoms and decreasing the surface reaction rate led to a change from the plate-like to the cellular morphology and the growth of the cell size.

KW - Nickel oxide

KW - Porous nickel

KW - Reduction process

UR - http://www.scopus.com/inward/record.url?scp=85032031260&partnerID=8YFLogxK

U2 - 10.1016/j.matpr.2017.09.021

DO - 10.1016/j.matpr.2017.09.021

M3 - Article

AN - SCOPUS:85032031260

VL - 4

SP - 11425

EP - 11429

JO - Materials Today: Proceedings

JF - Materials Today: Proceedings

SN - 2214-7853

IS - 11

ER -