Substrate controlled degradation rate of protective SiAlN coating via mitigating interfacial reaction
Source abstract
Abstract
The degradation rates of protective SiAlN coatings (0.9 µm thick) on pure Ti, Ti6Al4V, and Timetal 834 alloys in air at 800 °C were investigated and compared. The SiAlN coating on pure Ti was depleted and then formed a thin oxide scale after exposure of 50 h, whereas a 0.6 µm thick remnant SiAlN coating without any signs of oxidation was observed on Timetal 834. Interfacial reactions between SiAlN coatings and different substrates caused depletion of SiAlN, thereby determining the degradation rates of SiAlN coatings. The non-reactive alloying elements Sn and Al in Timetal 834 alloy could retard such interfacial reactions, thereby impeding coating degradation.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal and Thin Film Mechanics · Advanced ceramic materials synthesis · Semiconductor materials and devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
Show source-provided references
1. A low-cost hierarchical nanostructured beta-titanium alloy with high strength10.1038/ncomms11176 ↗
2. Fine alpha in current and newly developed Ti alloys10.1016/j.actamat.2019.05.022 ↗
3. Combustion behavior and mechanism of Ti-25V–15Cr compared to Ti-6Al-4V alloy10.1016/j.corsci.2021.109957 ↗
4. A primary study of the effect of hydrostatic pressure on stress corrosion cracking of Ti-6Al-4V alloy in 3.5% NaCl solution10.1016/j.corsci.2019.108402 ↗
5. Additive manufacturing of ultrafine-grained high-strength titanium alloys10.1038/s41586-019-1783-1 ↗
6. Metal matrix composites for aeroengines
7. Polysynthetic twinned TiAl single crystals for high-temperature applications10.1038/nmat4677 ↗
8. Progress in structural materials for aerospace systems10.1016/j.actamat.2003.08.023 ↗
9. SiO2–Al2O3–glass composite coating on Ti–6Al–4V alloy: oxidation and interfacial reaction behavior10.1016/j.corsci.2013.05.010 ↗
10. A conformable high temperature nitride coating for Ti alloys10.1016/j.actamat.2020.02.051 ↗
11. Hard nanocomposite coatings: thermal stability, oxidation resistance and toughness10.1016/j.surfcoat.2012.05.073 ↗
12. Microstructural design of hard coatings10.1016/j.pmatsci.2006.02.002 ↗
13. A first-principles study of the diffusion coefficients of alloying elements in dilute alpha-Ti alloys10.1039/C6CP01899H ↗
14. Microstructure and beta grain growth behavior of Ti–Mo alloys solution treated10.1016/j.matchar.2013.07.014 ↗
15. The mechanical properties of co-continuous Si3N4/Al composites manufactured by squeeze casting10.1016/j.msea.2010.06.047 ↗
16. Reactivity at the Al/Si3N4 interfaces10.1063/1.114084 ↗
17. Oxidation and degradation of amorphous SiAlN coating via forming Si-Si bond10.1016/j.corsci.2021.109318 ↗
18. Sn-containing Si3N4-based composites for adaptive excellent friction and wear in a wide temperature range10.1016/j.jeurceramsoc.2021.10.047 ↗
19. A thermodynamic evaluation of the system Si-Sn10.1016/0364-5916(96)00015-6 ↗
20. Effects of interfacial depletion on the degradation of SiAlN coating10.1016/j.apsusc.2022.155576 ↗