Yb2O3 and Gd2O3 doped strontium zirconate for thermal barrier coatings

Lanthanum–titanium–aluminum oxide: A novel thermal barrier coating material for applications at 1300°C

“…7,8 To meet the development of advanced gas-turbine engines that operated at higher gas temperature, great efforts have been made to seek for new ceramic materials with better performance than YSZ. [9][10][11] The new materials cover especially doped zirconia, [12][13][14] pyrochlores, [15][16][17] perovskites, 18,19 and aluminates. [20][21][22][23] 19 , LTA) is face-centered monoclinic with a huge unit cell, which is as four times large as that of the magnetoplumbite phase and interleaved with pseudobrookite-like layers.…”

Stability of rare earth oxides in a moist environment at elevated temperatures—Experimental and thermodynamic studies

“…These materials are, for example, often used as dopants in thermal barrier coatings. 1 In Table 1, some properties of these oxides are reported. 2,3 All the rare earth oxides melt in the range from 2573 K and 2773 K. Depending on the melting temperature and atomic number of the lanthanide element, two groups have to be distinguished 4 : the first one, Ceric group, includes the oxides from La 2 O 3 to Gd 2 O 3 , and the second, the Yttric one, the oxides from Dy 2 O 3 to Lu 2 O 3 .…”

In-situ deposition of silica layers during the operation of a micro-gas turbine and their effect on the oxidation of superalloy blades

“…Oxide-based thermal barrier coatings (TBCs) are an effective engineering solution for improving the service performance of GT components, for which yttrium-stabilized zirconia (YSZ) combined with Ni(Pt)Al or MCrAlY oxidation protection coatings is widely used [2][3][4][5][6][7]. Although these YSZ TBCs provide thermal insulation towards metallic substrates, the durability of the coatings is limited due to spallation [8], hot corrosion [9] and phase transformation [10], which have prompted further studies on the modification of the coatings themselves [11,12], as well as on the development of other types of oxides such as Yb 2 O 3 or Gd 2 O 3 [13], La 2 Ce 2 O 7 [14,15], Y 3 AlxFe 5-x O [16] and LaMgAl 11 O 19 [17].…”