The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C
To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.% Cr and 3wt.% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10% H2O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.
W. Zhu et al., "The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C," Oxidation of Metals, vol. 97, pp. 441 - 449, Springer, Mar 2022.
The definitive version is available at https://doi.org/10.1007/s11085-022-10098-3
Materials Science and Engineering
Keywords and Phrases
Cast iron; HiSiMo; Oxidation; TEM
International Standard Serial Number (ISSN)
Article - Journal
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04 Mar 2022