Article
Materials Science, Multidisciplinary
Halar Memon, Acacio Rincon Romero, Kerem Derelizade, Federico Venturi, Tanvir Hussain
Summary: In this study, a hybrid feedstock design of SiC/YAG coatings for thermal spraying is proposed, and the solid loading and phase content are varied to improve the performance of the coatings. The results show that the best-performing coatings have a promising wear resistance and a dense coating structure with minimal porosity.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Coatings & Films
Yongjing Cui, Mengqiu Guo, Changliang Wang, Jian Jiao, Laifei Cheng
Summary: Si/3Al(2)O(3)·2SiO(2) (Mullite)/BaO-SrO-Al2O3-SiO2 (BSAS) tri-layered EBCs were fabricated on SiC-based ceramic matrix composites (CMC) substrate via atmospheric plasma spraying technique. The BSAS coating showed good resistance to water vapor corrosion and effectively protected the CMC material.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Kenneth Kane, Eugenio Garcia, Padraig Stack, Michael Lance, Cory Parker, Sanjay Sampath, Bruce A. Pint
Summary: The study shows that EBCs have a certain effect on reducing the rate of SiO2 formation, especially when paired with a Si bond coating. The adhesion of the coating and roughness of the substrate play a crucial role in the effectiveness of EBCs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jianing Wang, Chaohui Wang, You Wang, Meiling Dong, Yuan You, Zhiyi Rong, Huinan Liu, Xiaodong Zhang, Zhongyu Zhu, Yuhang Wang
Summary: Yb2Si2O7 powders doped with SiC whisker were prepared as feed stocks for environmental barrier coatings through ball milling, spray drying, and vacuum sintering. The particle size of the powder can be optimized by adjusting the spray drying parameters. Vacuum sintering improves the density and flowability of the powders, while the SiC whisker maintains its original morphology.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Takumi Kitahara, Kent Mitani, Hiroki Saito, Yuji Ichikawa, Kazuhiro Ogawa, Takaya Masuda
Summary: It has been found that adding SiC to the top coating of EBCs can strengthen the coatings and enable crack-healing when subjected to high-temperature oxidation. The use of Yb2Si2O7/SiC granulated powder retains SiC particles in the coatings, leading to improved reliability of self-healing EBCs.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Kenneth Kane, Eugenio Garcia, Michael Lance, Cory Parker, Sanjay Sampath, Bruce Pint
Summary: Environmental barrier coatings (EBCs) are crucial for protecting SiC-based ceramic matrix composite components in next-generation high-efficiency industrial gas turbines (IGTs). However, limited data on EBC failure mechanisms exist, particularly at high temperatures. Experimental results showed that at elevated temperatures, EBCs formed thick, highly cracked, and fully crystalline cristobalite scales.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Coatings & Films
Nicholas Curry, Satyapal Mahade, Abhilash Venkat, Shrikant Joshi
Summary: This study evaluates the erosion resistance of suspension plasma spray coatings compared to other air plasma spray coatings. The results show that suspension plasma spray coatings outperform porous coatings and can be considered as an alternative to dense coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Michael J. Presby, Jamesa L. Stokes, Bryan J. Harder
Summary: Ceramic matrix composites (CMCs) and environmental barrier coatings (EBCs) are crucial for improving the efficiency of gas turbine engines, but their susceptibility to various damage modes limits their performance. The understanding of solid particle erosion (SPE) behavior of CMCs and EBCs is currently lacking. This paper reviews the status of SPE research for CMCs and EBCs and suggests future research directions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Coatings & Films
Dianying Chen
Summary: In this study, Yb2Si2O7 coatings were deposited on Si-based ceramic matrix composites using the suspension HVOF process. The effect of standoff distance on coating microstructure was evaluated, and it was found that shorter standoff distances resulted in denser amorphous coatings transforming to crystalline phases after heat treatment. Furthermore, the oxidation behavior of the SHVOF EBCs was compared with air plasma sprayed EBCs and showed a slower oxide growth rate.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Review
Materials Science, Ceramics
Chaokun Song, Fang Ye, Laifei Cheng, Yongsheng Liu, Qing Zhang
Summary: This review proposes three strategies to prolong the service life of CMC-SiC thermal-structure components and discusses important factors such as densification, matrix cracking stress, and self-healing component introduction.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Engineering, Electrical & Electronic
Kevin Rivera, Otto J. Gregory
Summary: Silicon carbide-silicon carbide ceramic matrix composites (SiC-SiC CMC's) are widely used in gas turbine engine hot sections due to their refractory nature and excellent toughness at high temperatures. A novel heat flux sensor has been developed for SiC-SiC CMC based engine components, which can withstand high temperatures. The sensor generates a thermoelectric voltage proportional to the temperature gradient and has a high calibration factor.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Jeroen A. Deijkers, Haydn N. G. Wadley
Summary: SiC composites are vulnerable to volatilization of their protective SiO2 surface oxide in water vapor rich combustion environments, and are typically protected by a silicon bond coat and ytterbium disilicate (Yb2Si2O7: YbDS) environmental barrier coating system. A duplex silicon-HfO2 bond coat is investigated as a potential solution, which reduces the average SiO2 thickness and improves the durability of the coating system.
Article
Chemistry, Multidisciplinary
Bofang Zhou, Taohua Li, Hongxia Zhang, Junliang Hou
Summary: The study found that Zr-Cu composite filler metal can effectively braze SiC ceramic, and the addition of SiCp and Mo can improve the properties of the composite filler metal and joint, increasing the shear strength of the joint.
Article
Materials Science, Ceramics
Hao Zhang, Min Ge, Huifeng Zhang, Weijia Kong, Shouquan Yu, Weigang Zhang
Summary: The study synthesized continuous SiC-ZrB2 composite ceramic fibers with excellent mechanical properties and high-temperature creep resistance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Kent Mitani, Hiroki Saito, Yuji Ichikawa, Kazuhiro Ogawa, Takaya Masuda, Naoki Okamoto
Summary: SiC ceramic matrix composites (CMC) have potential applications in hot section gas turbine components due to their high heat resistance and low density, but they degrade over time in steam oxidation environments. In this study, environmental barrier coatings (EBC) containing Yb2Si2O7 were used to protect SiC substrates. Self-healing property was enhanced by incorporating SiC in the form of Yb2Si2O7/SiC granulated powders. Different SiC contents and particle sizes were investigated to evaluate the long-term oxidation behavior of the coatings.
MATERIALS TRANSACTIONS
(2022)
