Chromium Diffusion Coatings for Mo-Based Silicides to Improve Their Oxidation Resistance
Source abstract
Abstract
The oxidation behavior of two ternary Mo-Si-Ti alloys (eutectic Mo-20.0Si-52.8Ti and eutectoid Mo-21.0Si-34.0Ti) was investigated using thermogravimetric analysis at 700 °C, 900 °C, and 1300 °C for 100 h. The eutectic alloy formed a protective SiO2/TiO2 oxide scale, whereas the eutectoid alloy showed catastrophic oxidation. To improve the oxidation behavior of these alloys, chromium diffusion coatings deposited via pack cementation on the surface were investigated. Cr coatings were found to be suitable for improving oxidation resistance at 700 °C and 900 °C but failed at 1300 °C due to the evaporation of thin scales. At 700 °C and 900 °C, the formation of a Cr2O3 scale was proven on the Ti-rich/Mo-lean eutectic composition. After exposure, the Ti-lean/Mo-rich eutectoid composition, which is intrinsically more prone to oxidation, was found to form a continuous Cr2O3 scale only at 700 °C.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
High Temperature Materials, DECHEMA-Research Institute, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany
Institute for Applied Materials—Materials Science and Engineering, Karlsruhe Institute of Technology, Engelbert-Arnold-Straße 4, 76131 Karlsruhe, Germany
Metals and Alloys II, University of Bayreuth, Prof.-Rüdiger-Bormann-Straße 1, 95447 Bayreuth, Germany
Funding
Deutsche Forschungsgemeinschaft (DFG)
References (69)
Show source-provided references
1. The hotter the engine, the better10.1126/science.1179327 ↗
2. Mo-Si-B alloys: Developing a revolutionary turbine-engine material10.1557/mrs2003.191 ↗
3. Mo-Si-B alloys for ultrahigh-temperature structural applications10.1002/adma.201200764 ↗
4. Oxidation mechanisms in Mo-reinforced Mo5SiB2 (T2)-Mo3Si alloys10.1016/S1359-6454(02)00039-3 ↗
5. Bürgel, R., Maier, H.J., and Niendorf, T. (2011). Handbuch Hochtemperatur-Werkstofftechnik: Grundlagen, Werkstoffbeanspruchungen, Hochtemperaturlegierungen und -Beschichtungen, Springer.10.1007/978-3-8348-9907-1_6 ↗
6. Turbine blade temperature calculation and life estimation—A sensitivity analysis10.1016/j.jppr.2013.04.004 ↗
7. Failure analysis of a gas turbine blade made of Inconel 738LC alloy10.1016/j.engfailanal.2004.10.002 ↗
8. Characterization of an industrially processed Mo-based silicide alloy10.1016/j.intermet.2004.03.006 ↗
9. A new, third-generation, single-crystal, casting superalloy10.1007/BF03221147 ↗
10. Effect of Ti (macro-)alloying on the high-temperature oxidation behavior of ternary Mo-Si-B alloys at 820–1300 °C10.1007/s11085-013-9375-1 ↗
11. High-temperature creep and oxidation behavior of Mo-Si-B alloys with high Ti contents10.1007/s11661-013-1944-z ↗
12. Creep of binary Fe-Al alloys with ultrafine lamellar microstructures10.1016/j.intermet.2017.07.016 ↗
13. Transient oxidation of Mo-Si-B alloys: Effect of the microstructure size scale10.1016/j.actamat.2009.06.036 ↗
14. Effects of lamellar spacing, volume fraction and grain size on creep strength of fully lamellar TiAl alloys10.1016/S0921-5093(97)00612-6 ↗
15. Near-eutectic ternary Mo-Si-B alloys: Microstructures and creep properties10.1007/s11837-016-2073-0 ↗
16. Constitution, oxidation and creep of eutectic and eutectoid Mo-Si-Ti alloys10.1016/j.intermet.2018.10.028 ↗
17. On the chemical and microstructural requirements for the pesting-resistance of Mo-Si-Ti alloys10.1016/j.jmrt.2020.06.002 ↗
18. Oxidation of commercial purity titanium10.1007/BF00659186 ↗
19. High temperature oxidation behavior and research status of modifications on improving high temperature oxidation resistance of titanium alloys and titanium aluminides: A review10.1016/j.jallcom.2016.06.212 ↗
20. Bianco, R., and Rapp, R.A. (1996). Metallurgical and Ceramic Protective Coatings, Springer.
21. Oxidation protective silicide coating on Mo-Si-B alloys10.1007/s11661-005-0178-0 ↗
22. Synthesis of oxidation resistant silicide coatings on Mo-Si-B alloys10.1016/j.scriptamat.2005.05.015 ↗
23. Characterization and oxidation behavior of silicide coating on multiphase Mo-Si-B alloy10.1016/j.intermet.2008.06.014 ↗
24. Oxidation-resistant coatings for ultra-high-temperature refractory Mo-based alloys10.1007/s11837-010-0148-x ↗
25. Oxidation behavior of pack-cemented Si-B oxidation protection coatings for Mo-Si-B alloys at 1300 °C10.1016/j.surfcoat.2015.02.015 ↗
26. Enhanced oxidation resistance of Mo-Si-B-Ti alloys by pack cementation10.1007/s11085-017-9730-8 ↗
27. Aluminum pack cementation on Mo-Si-B alloys: Kinetics and lifetime prediction10.1149/1.2775164 ↗
28. Growth kinetics and isothermal oxidation behavior of aluminide pack coatings on a multiphase Mo-Si-B alloy10.1007/s11085-019-09930-0 ↗
29. Aluminum pack cementation of Mo-Si-B alloys10.1016/j.scriptamat.2006.07.044 ↗
30. X-ray analysis of chromium-molybdenum and chromium-tungsten alloys10.1021/ac60002a006 ↗
31. Hot corrosion of materials: A fluxing mechanism?10.1016/S0010-938X(01)00057-9 ↗
32. The role of chromium in the hot corrosion of metals10.1149/1.3159332 ↗
33. Chromium enrichment on P11 ferritic steel by pack cementation10.1051/matecconf/20167400036 ↗
34. Chemical vapour deposition of chromium10.1016/0040-6090(77)90108-0 ↗
35. Anti-corrosion performance of chromium-coated steel in a carbon dioxide-saturated simulated oilfield brine10.20964/2017.06.94 ↗
36. Chromium diffusion coatings for the protection of low-alloy steel in a sulphidizing atmosphere10.1016/0010-938X(93)90343-F ↗
37. Microstructures and wear resistance of chromium coatings on P110 steel fabricated by pack cementation10.1007/s11771-010-0612-3 ↗
38. Anticorrosion performance of chromized coating prepared by pack cementation in simulated solution with H2S and CO210.1016/j.apsusc.2017.05.001 ↗
39. Formation of chromium coating and comparative examination on corrosion resistance with 13Cr steel in CO2-saturated simulated oilfield brine10.1142/S0218625X13500418 ↗
40. Passivation of nickel-base superalloy Inconel 690 by pack-cementation chromium coatings
41. Development of chromium and aluminum coatings on superalloys by pack-cementation technique10.4028/www.scientific.net/AMR.278.491 ↗
42. Chemical vapour deposition of chromium onto nickel10.1016/0040-6090(80)90058-9 ↗
43. Holleman, A.F. (2019). Lehrbuch der Anorganischen Chemie, Walter de Gruyter GmbH & Co KG.
44. The Cr-Ti (chromium-titanium) system10.1007/BF02881474 ↗
45. Mechanically driven bcc TiCr alloy and its hydrogen solubility10.1016/j.jallcom.2005.01.116 ↗
46. Literature survey on diffusivities of oxygen, aluminum, and vanadium in alpha titanium, beta titanium, and in rutile10.1007/BF02628396 ↗
47. Powder metallurgy strategies to improve properties and processing of titanium alloys: A review10.1002/adem.201600743 ↗
48. Self-diffusion in molybdenum10.1515/ijmr-1979-700412 ↗
49. Titanium self-diffusion in the intermetallic compound γ-TiAl10.1515/ijmr-1992-830805 ↗
50. Mortimer, R.G. (2000). Physical Chemistry, Academic Press.
51. Improving the oxidation resistance of Cr-Si-based alloys by ternary alloying10.1016/j.corsci.2019.108376 ↗
52. Hydrogen embrittlement of commercial purity titanium10.1016/S0010-938X(01)00159-7 ↗
53. The hydrogen embrittlement of titanium-based alloys10.1007/s11837-005-0115-0 ↗
54. Compatibility of materials with hydrogen. Particular case: Hydrogen embrittlement of titanium alloys10.1016/j.ijhydene.2009.01.058 ↗
55. Comparison of the kinetics and morphologic properties of titanium, Ti-1.5 Ni and Ti-2.5 Cu during oxidation in pure oxygen between 600 and 820 °C10.1007/BF00603475 ↗
56. Ellingham diagram: A new look at an old tool10.1016/j.corsci.2023.111113 ↗
57. Oxidation and nitridation behavior of Cr-Si alloys in air at 1473 K10.1007/s11085-015-9544-5 ↗
58. Morphology of oxide scales formed on chromium-silicon alloys at high temperatures10.1016/j.corsci.2020.109023 ↗
59. On the oxidation and nitridation of chromium at 1300 °C10.1007/s11085-010-9198-2 ↗
60. The volatilization of chromium oxide10.1149/1.2428106 ↗
61. Kinetics of the oxidation of chromium10.1149/1.2428576 ↗
62. On high temperature oxidation of chromium: I. Oxidation of annealed, thermally etched chromium at 800–1100 °C10.1149/1.2129478 ↗
63. Schütze, M. (2016). Stress effects in high temperature oxidation. Ref. Modul. Mater. Sci. Mater. Eng.10.1016/B978-0-12-803581-8.01568-X ↗
64. Factors controlling the high-temperature oxidation of chromium
65. Thermodynamics of the vaporization of Cr2O3: Dissociation energies of CrO, CrO2, and CrO310.1063/1.1701005 ↗
66. Oxidation/Vaporization kinetics of Cr2O310.1111/j.1151-2916.1971.tb12225.x ↗
67. Chromium transport through Cr2O3 scales I. On lattice diffusion of chromium10.1007/BF00738381 ↗
68. Chromium transport through Cr2O3 scales II. Changes in scale morphology during high vacuum treatment of oxidized chromium specimens10.1007/BF00738382 ↗
69. A novel nitridation-and pesting-resistant Cr-Si-Mo alloy10.1016/j.corsci.2022.110566 ↗