Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys
Source abstract
Abstract
Abstract Three Mo-Si-B based alloys (Mo-12Si-10B, Mo-12Si-10B-1Zr and Mo-12Si-10B-1Zr-0.3Y (at.%)) were fabricated to study the effects of Zr and especially further addition of Y on the oxidation behaviors of alloys at 1250 °C. Mo-12Si-10B alloy shows good oxidation resistance due to the formation of a protective SiO2 layer. However, as the result of the phase transformation of ZrO2, triggering the breaking up of the protective SiO2 layer, the addition of 1 at.% Zr (Mo-12Si-10B-1Zr alloy) leads to the catastrophic oxidation behavior. Further addition of 0.3 at.% Y (Mo-12Si-10B-1Zr-0.3Y alloy) eliminates this detrimental effect of Zr alloying by promoting the formation of monomorphic ZrSiO4 instead of polymorphic ZrO2 during oxidation. Besides, at the later oxidation stage (≥20 h), a continuous and compact Y2Si2O7 layer forms on the scale surface, further improving the oxidation resistance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
1. Mo-Si-B alloys: developing a revolutionary turbine-engine material10.1557/mrs2003.191 ↗
2. Mo-Si-B alloys for ultrahigh-temperature structural applications10.1002/adma.201200764 ↗
3. The hotter the engine, the better10.1126/science.1179327 ↗
4. Effect of Zr, B and C additions on the ductility of molybdenum10.1016/S0921-5093(01)01880-9 ↗
5. Improvement in the ductility of molybdenum alloys due to grain boundary segregation10.1016/S1359-6462(01)01242-8 ↗
6. Ductilization of Mo-Si solid solutions manufactured by powder metallurgy10.1016/j.actamat.2009.04.040 ↗
7. Effects of Zr additions on the microstructure and the mechanical behavior of PM Mo-Si-B alloys10.1007/s11837-012-0475-1 ↗
8. Improved fracture toughness of a Mo-12Si-8.5B-3Zr alloy by grain coarsening and its multiple toughening mechanisms10.1016/j.jallcom.2018.01.398 ↗
9. The multi-scale microstructure and strengthening mechanisms of Mo-12Si-8.5BxZr (at.%) alloys10.1016/j.ijrmhm.2017.06.007 ↗
10. Optimization of Mo-Si-B intermetallic alloys10.1007/s11661-005-0166-4 ↗
11. Influence of zirconium content on microstructure and creep properties of Mo-9Si-8B alloys10.1016/j.intermet.2013.08.017 ↗
12. Effect of Zr addition on the high-temperature oxidation behaviour of Mo-Si-B alloys10.1007/s11085-009-9175-9 ↗
13. High temperature oxidation of mechanically alloyed Mo-Si-B alloys10.1179/174327809X419122 ↗
14. Re-evaluation of the thermodynamic equilibria on the zirconia-rich side of the ZrO2-YO1.5 system10.1016/j.calphad.2018.03.004 ↗
15. Mechanisms of oxide scale formation on yttrium-alloyed Mo-Si-B containing fine-grained microstructure10.1016/j.corsci.2014.09.017 ↗
16. Effect of yttrium alloying on intermediate to high-temperature oxidation behavior of Mo-Si-B alloys10.1007/s11661-012-1589-3 ↗
17. High-temperature structural intermetallics10.1016/S1359-6454(99)00301-8 ↗
18. Processing and mechanical properties of a molybdenum silicide with the composition Mo-12Si-8.5B (at.%)10.1016/S0966-9795(00)00093-5 ↗
19. The development of protective borosilicate layers on a Mo-3Si-1B (weight percent) alloy10.1007/s11661-005-0011-9 ↗
20. Oxidation mechanisms in Mo-reinforced Mo5SiB2(T2)-Mo3Si alloys10.1016/S1359-6454(02)00039-3 ↗
21. Lowering the synthesis temperature of zircon powder by yttria addition10.1023/A:1006659023124 ↗
22. Facile synthesis and highly efficient selective adsorption properties of Y2Mo4O15 for methylene blue: kinetics, thermodynamics and mechanical analyses10.1016/j.jre.2018.03.013 ↗
23. Fournier · Bull. Soc. Chim. Fr. · 1970 · 12 · 4277
24. Yttrium silicate coatings for oxidation protection of carbon-silicon carbide composites10.1111/j.1151-2916.2000.tb01392.x ↗
25. Phase, microstructure, and oxidation resistance of yttrium silicates coatings prepared by a hydrothermal electrophoretic deposition process for C/C composites
26. A novel design of oxidation protective β-Y2Si2O7 nanowire toughened Y2SiO5/Y2O3-Al2O3-SiO2 glass ceramic coating for SiC coated carbon/carbon composites10.1016/j.corsci.2018.02.054 ↗