Article ID Journal Published Year Pages File Type
1468847 Corrosion Science 2014 11 Pages PDF
Abstract

•Oxidation protective layers were deposited on Mo–Si–B alloys by magnetron sputtering.•The oxidation behavior was studied at 800, 1000, and 1300 °C in air.•An aluminum borate scale formed on the Mo–70Al layer.•Mo–37Si–24B and Mo–46Si–24B coatings were protective at 800 and 1000 °C for up to 100 h.•The Mo–46Si–24B coating was protective for short times even at 1300 °C.

Oxidation protective Mo–70Al, Mo–37Si–15B and Mo–46Si–24B (at.%) coatings with 5–10 μm thickness were deposited on Mo–9Si–8B alloys by magnetron sputtering; and their oxidation behavior was studied at 800, 1000 and 1300 °C in air. On the Mo–70Al layer a dense aluminum borate scale grew at 800 °C; however, this coating rapidly degraded at 1000 °C linked to substrate oxidation at uncoated areas. The Mo–37Si–15B and Mo–46Si–24B layers provided oxidation protection to the Mo–Si–B alloy at 800 and 1000 °C for up to 100 h due to formation of a borosilicate scale. The latter coating was protective for short times even at 1300 °C.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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