Structural Characterization of Sputter-Deposited 304 Stainless Steel+10 wt pct Al Coatings
Abbreviated Journal Title
Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
OXIDATION BEHAVIOR; SPECIMEN PREPARATION; CYCLIC OXIDATION; ALLOY; COATINGS; HOT-CORROSION; ADHESION; PHASE; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering
An SS304 + 10 wt pct Al (with a nominal composition of Fe-18Cr-8Ni-10Al by wt pct and corresponding to Fe-17Cr-6Ni-17Al by at. pct) coating was deposited on a 304-type austenitic stainless steel (Fe-18Cr-8Ni by wt pct) substrate by the magnetron sputter-deposition technique using two targets: 304-type stainless steel (SS304) and Al. The as-deposited coatings were characterized by X-ray diffraction, transmission electron microscopy, and three-dimensional (3-D) atom probe techniques. The coating consists of columnar grains with alpha ferrite with the body-centered cubic (bcc) (A2) structure and precipitates with a B2 structure. It also has a deposition-induced layered structure with two alternative layers (of 3.2 nm wavelength): one rich in Fe and Cr, and the other enriched with Al and Ni. The layer with high Ni and Al contents has a B2 structure. Direct confirmation of the presence of B2 phase in the coating was obtained by electron diffraction and 3-D atom probe techniques.
Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Seelam, Uma Maheswara Rao; Suryanarayana, C.; Heinrich, Helge; Ohkubo, Tadakatsu; Hono, Kazuhiro; and Cheruvu, N. S., "Structural Characterization of Sputter-Deposited 304 Stainless Steel+10 wt pct Al Coatings" (2012). Faculty Bibliography 2010s. 3273.