On the high temperature oxidation of MoSi2 particles with boron addition

Ding，Zhaoying1; Brouwer，Johannes C.1; Yao，Xiyu2; Zhu，Jia Ning1; Hermans，Marcel J.M.1; Popovich，Vera1; Sloof，Willem G.1

2024-09-01

10.1016/j.jeurceramsoc.2024.05.002

Journal of the European Ceramic Society   影响因子和分区

0955-2219

1873-619X

Boron doped MoSi particles have been envisioned as sacrificial particles for self-healing thermal barrier coatings (TBCs) but their oxidation behaviour is yet not well understood. In this work, oxidation of MoSi based particle is studied in the temperature range of 1050–1200 °C. The oxidation proceeds from a transient to a steady-state oxidation stage. The kinetics during steady-state oxidation is captured with a thermal diffusion-based model. As compared to the oxidation of pure MoSi particles, the addition of boron strongly enhances the silica formation. Also, a finer dispersion of MoB in the MoSi matrix accelerates the formation of silica. The oxide growth rate constant increases proportional with the boron content of the MoSi particles. This enhanced oxidation is related to the microstructure of the oxide scale. Upon oxidation, boron yields BO, which promptly merge with SiO to form amorphous borosilicate, hindering the formation of crystalline SiO. Consequently, the migration of oxygen in the borosilicate oxide scale is faster than in the silica oxide scale on pure MoSi particles.

Boron Kinetics MoSi2 Oxidation Particles

SCI ; EI

英语

其他

20242016093869

Growth rate ; Rate constants ; Silica ; Silicon ; Thermal barrier coatings

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Reactions:802.2

MATERIALS SCIENCE

2-s2.0-85192698497

Scopus

1.Department of Materials Science and Engineering,Delft University of Technology,Delft,Mekelweg 2,2628 CD,Netherlands
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Ding，Zhaoying,Brouwer，Johannes C.,Yao，Xiyu,et al. On the high temperature oxidation of MoSi2 particles with boron addition[J]. Journal of the European Ceramic Society,2024,44(12):7170-7179.

Ding，Zhaoying.,Brouwer，Johannes C..,Yao，Xiyu.,Zhu，Jia Ning.,Hermans，Marcel J.M..,...&Sloof，Willem G..(2024).On the high temperature oxidation of MoSi2 particles with boron addition.Journal of the European Ceramic Society,44(12),7170-7179.

Ding，Zhaoying,et al."On the high temperature oxidation of MoSi2 particles with boron addition".Journal of the European Ceramic Society 44.12(2024):7170-7179.