TY - JOUR
T1 - Preparation of crystalline ytterbium disilicate environmental barrier coatings using suspension plasma spray
AU - Ryu, Ho lim
AU - Lee, Sung Min
AU - Han, Yoon Soo
AU - Choi, Kyun
AU - An, Gye Seok
AU - Nahm, Sahn
AU - Oh, Yoon Suk
N1 - Funding Information:
This work was supported by the research fund of the Strategic Core Material Technology Development Project ( # 10065691 ) of the Ministry of Trade, Industry and Energy , Rep. of Korea.
Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - In high-speed modern industries, high-temperature stability of materials is essential. A promising high-temperature material currently attracting attention is silicon carbide (SiC)-based ceramic matrix composites (CMC). However, a disadvantage of these materials is their reduced lifetime in an oxidizing atmosphere. To overcome this, environmental barrier coating can be employed. In this study, we aimed to fabricate an environmental barrier coating using suspension plasma spray with Yb2Si2O7, which exhibits excellent oxidation resistance and a similar thermal expansion coefficient to SiC. To prepare the crystalline Yb2Si2O7 coating layer, the gas concentration of the plasma spray was adjusted, and then the suspension manufacturing solvent was adjusted and sprayed. The prepared coating samples were analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscopes, and energy dispersive X-ray spectroscopy to determine phase and microstructure changes. Highly crystalline ytterbium disilicate was observed at low plasma enthalpy with no hydrogen and 20% addition of water.
AB - In high-speed modern industries, high-temperature stability of materials is essential. A promising high-temperature material currently attracting attention is silicon carbide (SiC)-based ceramic matrix composites (CMC). However, a disadvantage of these materials is their reduced lifetime in an oxidizing atmosphere. To overcome this, environmental barrier coating can be employed. In this study, we aimed to fabricate an environmental barrier coating using suspension plasma spray with Yb2Si2O7, which exhibits excellent oxidation resistance and a similar thermal expansion coefficient to SiC. To prepare the crystalline Yb2Si2O7 coating layer, the gas concentration of the plasma spray was adjusted, and then the suspension manufacturing solvent was adjusted and sprayed. The prepared coating samples were analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscopes, and energy dispersive X-ray spectroscopy to determine phase and microstructure changes. Highly crystalline ytterbium disilicate was observed at low plasma enthalpy with no hydrogen and 20% addition of water.
KW - Ceramic matrix composite
KW - Environmental barrier coatings
KW - Silicon carbide
KW - Suspension plasma spray
UR - http://www.scopus.com/inward/record.url?scp=85058472684&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.12.048
DO - 10.1016/j.ceramint.2018.12.048
M3 - Article
AN - SCOPUS:85058472684
SN - 0272-8842
VL - 45
SP - 5801
EP - 5807
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -