TY - JOUR
T1 - Microstructure control and change in thermal conductivity of 8YSZ/SiO2 multi-compositional coating by suspension plasma spraying
AU - Jeon, Hak Beom
AU - Lee, In Hwan
AU - An, Gye Seok
AU - Oh, Yoon Suk
N1 - Funding Information:
This work was supported by the Korea Institute of Ceramic Engineering and Technology, funded by the Industrial Strategic Technology Development Program (#10077479) of the Ministry of Trade, Industry and Energy (MOTIE).
Publisher Copyright:
© 2019, Hanyang University. All rights reserved.
PY - 2018
Y1 - 2018
N2 - In recent years, thermal insulation coating technology for automotive engine parts has received significant attention as a means of improving the thermal efficiency of automotive engines. One of the characteristics of thermal insulation coatings is their low thermal conductivity, and, materials such as YSZ (Yttria-stabilized zirconia), which have low thermal conductivity, are used for this purpose. This research presents a study of the changes in the microstructure and thermal conductivity of 8YSZ/SiO2 multi compositional thermal insulation coating for different compositions, and particle size distributions of suspension, when it is subjected to suspension plasma spraying. To obtain a porous coating structure, the mixing ratio of 8YSZ and SiO2 particles and the particle sizes of the SiO2 were changed. The microstructure, phase formation behavior, porosity and thermal conductivity of the coatings were analyzed. The porosities were found to be 1.2-32.1%, and the thermal conductivities of the coatings were 0.797-0.369 W/mK. The results of the study showed that the microstructures of the coatings were strongly influenced by the particle size distributions, and that the thermal conductivities of the coatings were greatly impacted by the microstructures of the coatings.
AB - In recent years, thermal insulation coating technology for automotive engine parts has received significant attention as a means of improving the thermal efficiency of automotive engines. One of the characteristics of thermal insulation coatings is their low thermal conductivity, and, materials such as YSZ (Yttria-stabilized zirconia), which have low thermal conductivity, are used for this purpose. This research presents a study of the changes in the microstructure and thermal conductivity of 8YSZ/SiO2 multi compositional thermal insulation coating for different compositions, and particle size distributions of suspension, when it is subjected to suspension plasma spraying. To obtain a porous coating structure, the mixing ratio of 8YSZ and SiO2 particles and the particle sizes of the SiO2 were changed. The microstructure, phase formation behavior, porosity and thermal conductivity of the coatings were analyzed. The porosities were found to be 1.2-32.1%, and the thermal conductivities of the coatings were 0.797-0.369 W/mK. The results of the study showed that the microstructures of the coatings were strongly influenced by the particle size distributions, and that the thermal conductivities of the coatings were greatly impacted by the microstructures of the coatings.
KW - Microstructure
KW - Porosity
KW - Suspension plasma spraying
KW - Thermal conductivity
KW - Thermal insulation coating
UR - http://www.scopus.com/inward/record.url?scp=85059525926&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85059525926
SN - 1229-9162
VL - 19
SP - 450
EP - 454
JO - Journal of Ceramic Processing Research
JF - Journal of Ceramic Processing Research
IS - 6
ER -