Oxidation behavior of atomized Fe40Al intermetallics doped with boron and reinforced with alumina fibers

• Published in: Journal of materials engineering and performance Vol. 9; no. 6; pp. 638 - 642
• Main Authors: ESPINOSA-MEDINA, M. A, CASALES, M, MARTINEZ-VILLAFANE, A, PORCAYO-CALDERON, J, IZQUIERDO, G, MARTINEZ, L, GONZALEZ-RODRIGUEZ, L. G
• Format: Journal Article
• Language: English
• Published: New York, NY Springer 01.12.2000; Springer Nature B.V
• Subjects: Alloys; Aluminum; Applied sciences; Atomizing; Cross-disciplinary physics: materials science; rheology; Dispersion-, fiber-, and platelet-reinforced metal-based composites; Exact sciences and technology; Ferrous alloys; Gain; Intermetallics; Materials science; Materials synthesis; materials processing; Metals. Metallurgy; Other materials; Oxidation resistance; Physics; Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation; Spalling; Specific materials; Voids; Intermetallic compounds; Fibre reinforced metal; Metal powder; Experimental study; Powder metallurgy; TGA; Binary alloys; Composite materials; Aluminium alloys; Oxidation; Atomization; Alumina; Iron base alloys; Ceramic fiber; Boron additions; SEM; XRD
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1361/105994900770345494

Isothermal oxidation resistance of Fe40 (at.%) Al-based atomized and deposited intermetallic alloys has been evaluated. The alloys included Fe40Al, Fe40Al + 0.1B, and Fe40Al + 0.1B + 10Al sub(2)O sub(3) at 800, 900, 1000, and 1100 degree C. The tests lasted approximately 100 h, although in most cases there was scale spalling. At 800 and 900 degree C, the Fe40Al + 0.1B alloy had the lowest weight gain, whereas the Fe40Al alloy had the highest weight gain at 800 degree C (0.10 mg/cm super(2)) and the Fe40Al + 0.1B + 10Al sub(2)O sub(3) alloy was the least oxidation resistant at 900 degree C with 0.20 mg/cm super(2). At 1000 degree C, the Fe40Al + 0.1B alloy showed the highest weight gain with 0.12 mg/cm super(2) and the Fe40Al alloy the lowest. At 1100 degree C, again, as at 900 degree C, the Fe40Al alloy was the least resistant, whereas the Fe40Al + 0.1B alloy performed the best, but the three alloys exhibited a paralinear bahavior on the weight-gain curves, indicating the spalling, breaking down, and rehealing of the oxides. This spalling was related to voids formed at the metal-oxide interface.