Protective Coating Shown to Improve Service Temps for Niobium-based Alloys
A research team from Northwestern Polytechnical University successfully achieved a duration of more than 128 hours at 1,500°C, thanks to multi-layered silicide coating.
Dr. Jia Sun and a research team from Northwestern Polytechnical University have published a paper describing how niobium- (Nb-) based alloys successfully achieved duration of more than 128 hours at ultrahigh temperature of 1,500°C, thanks to a multi-layered silicide coating.
Dr. Sun says that, through optimizing interfaces, the silicide coating with a layer of aluminum oxide-adsorbed particles exhibited three-times higher oxidation resistance capacity than one without it. The Al2O3-adsorbed-particle layer served as an element-diffusion barrier, and a porous Nb5Si3 layer that was formed provided a stress-transition zone, and these contributed to the significant improvement in performance.
These findings are described in the article entitled “A Long-term Ultrahigh Temperature Application of Layered Silicide Coated Nb Alloy in Air,” recently published in Applied Surface Science. Read it HERE.
Related Content
-
3 Tests to Ensure Parts are Clean Prior to Plating
Making sure that all of the pre-processing fluids are removed prior to plating is not as simple as it seems. Rich Held of Haviland Products outlines three tests that can help verify that your parts are clean.
-
Products Finishing Reveals 2023 Qualifying Top Shops
Each year PF conducts its Top Shops Benchmarking Survey, offering shops a tool to better understand their overall performance in the industry. The program also recognizes shops that meet a set of criteria to qualify as Top Shops.
-
In-House Blackening of Ferrous and Non-Ferrous Metals
Process satisfies customers’ shipping requirements while meeting stricter water regulations in times of drought.