Mechanical properties and CMAS corrosion resistance of La2Ce2O7/YSZ composite thermal barrier coatings

Thursday, May 10, 2018: 8:40 AM
Tampa 1 (Gaylord Palms Resort )
Ms. Yongxia Kang , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Prof. Yu Bai , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Prof. Chonggao Bao , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Dr. Wei Fan , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
Dr. Lei Zhang , State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
50 wt.% La2Ce2O7 (LC)/YSZ composite thermal barrier coating (TBC) was deposited by supersonic atmospheric plasma spraying (SAPS). The mixture of LC and YSZ can effectively eliminate the sudden decrease of thermal expansions coefficients of LC. The results of CMAS corrosion tests indicated that the LC/YSZ composite coating reveals high resistance to the penetration of CMAS with reprecipitation of La-Ce apatite, CaAl2Si2O8, MgAl2O4 and t-ZrO2. Furthermore, compared to YSZ coating, the LC/YSZ composite coating can obviously improve the thermal cycling lives under CMAS corrosion.
See more of: Mechanical, Tribological, Oxidation & Corrosion Behavior of Aerospace-based Coatings
See more of: Advanced Coatings for the Aerospace Industry (joint symposium with AeroMat)