High temperature oxidation behavior of ferritic stainless steel containing W and Ce. (September 2018)

• Record Type: Journal Article
• Authors: Wei, Liangliang; Zheng, Jiahao; Chen, Liqing; Misra, Raja Devesh Kumar
• Is Part Of: Corrosion science. Volume 142(2018)
• Page Start: 79
• Page End: 92
• Publication Date: 2018-09
• Subjects: A. Stainless steel -- A. Rare earth elements -- B. SEM -- B. EPMA -- C. Oxidation -- C. Interfaces; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2018.07.017
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Ce and W are added in Fe-Cr alloy to improve its high temperature performance. Higher oxidation resistance is obtained with adding ∼0.05 wt.% Ce. Various content of W has apparently different effect on oxidation resistance. Adding Ce and W can reduce the amount of dissolved Laves phase at 1000–1050 °C. Laves phase precipitated near oxide film has an important effect on oxidation process. Abstract: The oxidation behavior of a ferritic stainless steel alloyed with elements, W and Ce, was studied at 950―1100 °C for up to 100 h. The oxide film was compact and uniform on the addition of Ce, and the number of defects at the oxide/metal interface was significantly decreased such that it exhibited good adhesion. The addition of Ce or combination of Ce and W reduced the number of dissolved Laves phase (Fe, Cr, Si)2 (Nb, Mo) at 1000―1050 °C, which precipitated within the grains or at the grain boundaries. The inward growth of oxide film was effectively hindered by Laves phase.