Design and preparation of MoSi2/SiO2-Nb2O5/NbSi2 multilayer coating on Nb alloy: Microstructure and hot corrosion behavior
Source abstract
Abstract
A MoSi 2/SiO 2-Nb 2O 5/NbSi 2 multilayer coating was designed on Nb alloys using halide activated pack cementation (HAPC) and an innovative liquid plasma-assisted particle deposition and sintering (LPDS) method to improve its hot corrosion resistant. The weight gain of MoSi 2/SiO 2-Nb 2O 5/NbSi 2 coating was 3.204 mg/cm 2 after 200 h, which was 85.7% lower than that of NbSi 2/Nb 2O 5-SiO 2 coating, while the life of NbSi 2 coating was restricted only 100 h (20.539 mg/cm 2) at 900 °C in Na 2SO 4 +NaCl salt. This improved performance is attributed to the prefabricated SiO 2-based barrier layer and MoSi 2 as a Si source to supplement the SiO 2 content, thus effectively alleviating the penetration of oxygen and molten salts.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · MXene and MAX Phase Materials · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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