Lanthanum Hexaaluminate — a New Material for Atmospheric Plasma Spraying of Advanced Thermal Barrier Coatings

Microstructure and Thermal Cycling Behavior of Air Plasma-Sprayed YSZ/LaMgAl11O19 Composite Coatings

“…Recently, magnetoplumbite-type LaMgAl 11 O 19 (LaMA) oxide with high fracture toughness (Ref 10), high phase stability and excellent sintering resistance at elevated temperature (Ref [11][12][13][14], has been developed as a new TBCs candidate material. Previous studies in our research group indicated that LaMA coating exhibited the longest thermal cycling lifetime among its counterparts of MgO-doped magnetoplumbite-type hexaluminates (Ref 15) and a close thermal cycling lifetime to the typical YSZ coating when surface testing temperature was fixed at 1250°C ( Ref 16).…”

Comparison of Thermal Shock Behavior of 7ysz, 15ysz and Sysz Thermal Barrier Coatings Produced by Aps Method

“…Therefore, investigation of novel TBC materials with ultra-high temperature capability, low thermal conductivity and long-term life time is a key problem for the next generation of turbine engines. Some ceramic materials such as La 2 O 19 and other kinds of rare earth doped zirconia [9][10][11][12][13][14][15][16][17][18][19] have been investigated as potential TBC materials. In recent years, nanostructured zirconia based TBCs deposited by atmospheric plasma spraying have been the focus of attention.…”

Improvement in thermal shock resistance of gadolinium zirconate coating by addition of nanostructured yttria partially-stabilized zirconia

“…This means that higher surface temperature of the hot-section metal components and larger thermal gradient are required. Over the past decades, explorations for new generation of candidate ceramic TBC material with lower thermal conductivity and higher phase stability at higher temperature over 1473 K have been undertaken worldwide to meet this ambitious goal [8][9][10][11][12][13][14][15]. Among a large numbers of candidate materials investigated, pyrochlore-structure rare earth zirconates (Ln 2 Zr 2 O 7 , Ln=La, Nd, Sm, Gd) with remarkably lower thermal conductivity, good phase stability and low sintering rate show promising potential for application of the ceramic top-coat materials for future TBCs [14][15][16][17][18].…”