Phase stability, microstructural and thermo-physical properties of BaLn 2 Ti 3 O 10 (Ln=Nd and Sm) ceramics
Source abstract
Abstract
Abstract The phase stability, microstructural evaluation and thermo-physical properties of BaLn2Ti3O10 (BLnT, Ln=Nd and Sm) ceramics for thermal barrier coating (TBCs) application have been investigated. BLnT (Ln=Nd and Sm) powders is found thermally stable at 1500 °C after exposure for 110 h, and the bulk materials exhibit lamellar structure. BLnT (Ln=Nd and Sm) bulk materials show anisotropy in thermo-physical properties due to the insertion of Ba atoms between [Ln2Ti3O10] (Ln=Nd and Sm) sheets. The thermal conductivities of BLnT (Ln=Nd and Sm) are apparently lower than those of ZrO2–8Y2O3 (8YSZ). Also, BaSm2Ti3O10 exhibits relatively lower thermal conductivity as compared to BaNd2Ti3O10. The thermal expansion coefficient (TEC) of BLnT (Ln=Nd and Sm) is found comparable to that of 8YSZ. BaNd2Ti3O10 exhibits relatively larger TEC than BaSm2Ti3O10. The above results suggest that BLnT (Ln=Nd and Sm) ceramics could be a good potential material for TBC applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced ceramic materials synthesis · Semiconductor materials and devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Progress in coatings for gas turbine airfoils10.1016/S0257-8972(98)00667-7 ↗
2. Overview on advanced thermal barrier coatings10.1016/j.surfcoat.2010.08.151 ↗
3. Ceramic materials for thermal barrier coatings10.1016/S0955-2219(03)00129-8 ↗
4. A sintering model for plasma-sprayed zirconia TBCs. Part I: free-standing coatings10.1016/j.actamat.2008.10.024 ↗
5. Effect of gadolinia on phase structure and thermal conductivity of ZrO2–4.5mol%Y2O3 ceramics10.1016/j.matlet.2008.03.052 ↗
6. Influence of Gd2O3 and Yb2O3 Co-doping on phase stability, thermo-physical properties and sintering of 8YSZ10.1016/S1000-9361(11)60466-4 ↗
7. Thermal shock resistance and mechanical properties of La2Ce2O7 thermal barrier coatings with segmented structure10.1016/j.ceramint.2009.02.025 ↗
8. Evolution of high temperature corrosion behavior of La2(Zr0.7Ce0.3)2O7 with the addition of Y2O3 thermal barrier coatings in contacts with vanadate-sulfate salts10.1016/j.jallcom.2012.04.074 ↗
9. Thermal expansion and therma conductivity of SmxZr1−xO2−x/2 (0.1≤x≤0.5) ceramics10.1016/j.ceramint.2008.02.016 ↗
10. Preparation and microstructural of (Nd1−xGdx)2(Ce1−xZrx)2O7 solid solutions10.1016/j.ceramint.2009.02.009 ↗
11. Influence of B site substituent Ti on the structure and thermophysical properties of A2B2O7-type pyrochlore Gd2Zr2O710.1016/j.actamat.2009.06.040 ↗
12. Lanthanum-titanium-aluminum oxide: a novel thermal barrier coating material for applications at 1300 degrees C10.1016/j.jeurceramsoc.2011.03.036 ↗
13. Failure of the plasma-sprayed coating of lanthanum hexaluminate10.1016/j.jeurceramsoc.2008.01.023 ↗
14. Perovskite-type strontium zirconate as a new material for thermal barrier coatings10.1111/j.1551-2916.2008.02472.x ↗
15. Structures and phase transitions in perovskites—a group-theoretical approach10.1107/S0108767304024493 ↗
16. Yb2O3 and Gd2O3 doped strontium zirconate for thermal barrier coatings10.1016/j.jeurceramsoc.2008.05.013 ↗
17. Investigation of the thermal conductivity of calcium cerate and calcium zirconate10.1016/0254-0584(92)90197-G ↗
18. Thermal and mechanical properties of SrHfO310.1016/j.jallcom.2004.03.113 ↗
19. Thermal barrier coating materials10.1016/S1369-7021(05)70934-2 ↗
20. Transformations of Ruddlesden–Popper oxides to new layered perovskite oxides by metathesis reactions10.1021/ja9914644 ↗
21. Ruddlesden–Popper structured BaLa2Ti3O10, a highly anisotropic material for thermal barrier coatings10.1016/j.ceramint.2012.02.017 ↗
22. S. Sambasivan, K. Steiner, Highly Anisotropic Ceramic Thermal Barrier Coating Material and Related Composites, Patent no. US 6680126 B1, 2004.
23. Thermo-physical and thermal cycling properties of plasma-sprayed BaLa2Ti3O10 coating as potential thermal barrier materials10.1016/j.surfcoat.2009.09.009 ↗
24. Maglic · 1976