Thermal Shock Characteristics of Plasma Sprayed Mullite Coatings

Microstructural and thermal properties of plasma sprayed mullite coatings

“…It is interesting to point out that the crystallization effect could be bypassed during thermal shock experiments on plasma sprayed mullite coatings [4]. As illustrated in Fig.…”

“…To this purpose, mullite (3Al 2 O 3 -2SiO 2 ) coatings are particularly promising due to their high thermal stability, low thermal conductivity, high resistance in highly oxidative and corrosive environments, high resistance to crack propagation and high thermal shock resistance [1][2][3][4][5][6]. Previous works have demonstrated that mullite coated diesel engine components exhibited decreased surface cracking when compared to zirconia coated ones [7].…”

Synthesis, characterization, and sintering behavior of Yb3Al5O12 powders

“…Up to now, yttria-stabilized zirconia (YSZ) is the most widely studied and commercial TBC material [7,8]. However, the operating temperature of YSZ is restricted due to phase transformation and high oxygen diffusivity at elevated temperature [9][10][11][12]. Thus, refractory oxides are the focus of the search for new and alternative TBC materials.…”

High-Velocity Oxy-Fuel (HVOF) Suspension Spraying of Mullite Coatings

“…Over the entire temperature range of the crystalline phase, no polymorphic phase transitions occur, which results in particularly high thermal shock resistance and high strength (Ref [1][2][3]. Mullite-based protective and thermal barrier coatings are applied in heat exchangers, gas turbines, and internal combustion engines, i.e., diesel engines, often in combination with SiC or Si 3 N 4 thermal barriers by virtue of similar thermal expansion coefficients and chemical compatibility (Ref 4,5).…”