TY - JOUR
T1 - Selective oxidation of aluminium in Mo(Al,Si)2
AU - Ding, Zhaoying
AU - Brouwer, Johannes C.
AU - Kwakernaak, Cees
AU - Hermans, Marcel J.M.
AU - Popovich, Vera
AU - Quadakkers, Willem J.
AU - Sloof, Willem G.
PY - 2023
Y1 - 2023
N2 - Mo(AlxSi1-x)2 alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al2O3 scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10−14 and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al2O3 scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al2O3 layer contributes to excellent oxidation resistance.
AB - Mo(AlxSi1-x)2 alloy with x in the range of 0.35–0.65 were prepared by a one-step spark plasma sintering. To study the exclusive formation of an α-Al2O3 scale, oxidation experiments were conducted in low and high oxygen partial pressure ambient at 1373 K; viz.: 10−14 and 0.21 atm. The oxidation kinetics follows a parabolic rate law after a transient period. A counter-diffusion process of O and Al along grain boundaries of Al2O3 scale is responsible for the equiaxed and columnar grain growth based on a two-layered microstructure. The formation of a dense equiaxed α-Al2O3 layer contributes to excellent oxidation resistance.
KW - Alumina scale growth
KW - Diffusion
KW - Mo(Al,Si)2
KW - Oxidation
KW - Phase transformation
UR - http://www.scopus.com/inward/record.url?scp=85143126509&partnerID=8YFLogxK
U2 - 10.1016/j.corsci.2022.110884
DO - 10.1016/j.corsci.2022.110884
M3 - Article
AN - SCOPUS:85143126509
VL - 211
JO - Corrosion Science: the journal on environmental degradation of materials and its control
JF - Corrosion Science: the journal on environmental degradation of materials and its control
SN - 0010-938X
M1 - 110884
ER -