TY - JOUR

T1 - Method for determination of effective binary diffusivities in dissolution of dense ceramic materials

AU - Guarco, Jeronimo

AU - Burhanuddin, Burhanuddin

AU - Vollmann, Sandra

AU - Harmuth, Harald

N1 - Funding Information: The authors gratefully acknowledge the financial support under the scope of the COMET program within the K2 Center “Integrated Computational Material, Process and Product Engineering (IC-MPPE)” (Project No 859480 ). This program is supported by the Austrian Federal Ministries for Climate Action, Environment, Energy, Mobility, Innovation and Technology (BMK) and by the Digital and Economic Affairs (BMDW). This is represented by the Austrian research funding association (FFG), and the federal states of Styria, Upper Austria, and Tyrol. Funding Information: The authors gratefully acknowledge the financial support under the scope of the COMET program within the K2 Center ?Integrated Computational Material, Process and Product Engineering (IC-MPPE)? (Project No 859480). This program is supported by the Austrian Federal Ministries for Climate Action, Environment, Energy, Mobility, Innovation and Technology (BMK) and by the Digital and Economic Affairs (BMDW). This is represented by the Austrian research funding association (FFG), and the federal states of Styria, Upper Austria, and Tyrol. Publisher Copyright: © 2021 The Authors

PY - 2022/3/15

Y1 - 2022/3/15

N2 - A method is proposed to determine the effective binary diffusivities in a dissolution of dense ceramics in liquid slags. This is achieved by combining computational fluid dynamics with a boundary layer approach to overcome the resolution problem that is associated with high Schmidt numbers. The rotating finger test experiment was performed with a dense alumina fine grain ceramic in a calcium aluminosilicate (CAS) slag. During the experiment, the sample dissolved, and the sample's shape deviated substantially from the initial cylindrical shape. The simulations were conducted in a middle step whereat the sample was already corroded, and the geometry was obtained from the laser measurements of the corroded surface. The diffusivities were evaluated via the average mass flux density and by fitting the experimental and simulation curves. Good agreement between the simulated and experimental corrosion profiles existed for the diffusivities evaluated by using the two methods.

AB - A method is proposed to determine the effective binary diffusivities in a dissolution of dense ceramics in liquid slags. This is achieved by combining computational fluid dynamics with a boundary layer approach to overcome the resolution problem that is associated with high Schmidt numbers. The rotating finger test experiment was performed with a dense alumina fine grain ceramic in a calcium aluminosilicate (CAS) slag. During the experiment, the sample dissolved, and the sample's shape deviated substantially from the initial cylindrical shape. The simulations were conducted in a middle step whereat the sample was already corroded, and the geometry was obtained from the laser measurements of the corroded surface. The diffusivities were evaluated via the average mass flux density and by fitting the experimental and simulation curves. Good agreement between the simulated and experimental corrosion profiles existed for the diffusivities evaluated by using the two methods.

KW - corrosion

KW - diffusion

KW - wear resistance

KW - Al2O3

KW - dense ceramics

KW - Corrosion (C)

KW - Diffusion (C)

KW - Al2O3 (E)

KW - Wear resistance (C)

KW - Dense ceramics

UR - http://dx.doi.org/10.1016/j.ceramint.2021.11.264

UR - http://www.scopus.com/inward/record.url?scp=85120330429&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2021.11.264

DO - 10.1016/j.ceramint.2021.11.264

M3 - Article

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

ER -