A comparative study of oxide scales grown on stainless steel and nickel-based superalloys in ultra-high temperature supercritical water at 800 °C

Behnamian, Yashar; Mostafaei, Amir; Kohandehghan, Alireza; Amirkhiz, Babak Shalchi; Serate, Dominic; Sun, Yanping; Liu, Subiao; Aghaie, Ermia; Zeng, Yimin; Chmielus, Markus; Zheng, Wenyue; Guzonas, David; Chen, Weixing; Luo, Jing

doi:10.1016/j.corsci.2016.02.004

Cited by 133 publications

(59 citation statements)

References 47 publications

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“…In Fe-Ni-Cr alloys, outward diffusion of iron and nickel and reaction with oxygen leads to the formation of oxides such as Fe 3 O 4 , Fe 2 O 3 , FeO, and NiO, depending on the oxygen concentration, temperature and exposure time of SCW [19]. The high corrosion resistance of austenitic steels in SCW is attributed to the formation of a protective chromia (Cr 2 O 3 )-based oxide rather than a spinel (FeCr 2 O 4 )-based oxide [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

On-line monitoring of oxide formation and dissolution on alloy 800H in supercritical water

et al. 2016

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Section: Introductionmentioning

confidence: 99%

On-line monitoring of oxide formation and dissolution on alloy 800H in supercritical water

et al. 2016

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“…The term superalloy denotes an alloy that shows numerous key characteristics, namely excellent mechanical strength, resistance to thermal creep deformation, good surface stability and resistance to high temperature corrosion or oxidation [8][9][10][11]. Recently, researchers have successfully printed and characterized the alloy 718 at high relative density using BJP [6].…”

Section: Introductionmentioning

confidence: 99%

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

et al. 2016

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Powder bed binder jet printing is an additive manufacturing method in which powder is deposited layer-by-layer and selectively joined in each layer with binder. Since the powder does not melt during printing, the density after printing is about 50%, and sintering is needed to densify as-printed parts. In this study, we investigate the effect of sintering temperature on density, microstructure, phase formation and mechanical properties of power bed binder jet printed alloy 625 parts. To determine the sintering temperatures, the as-received powder was subjected to differential scanning calorimetry analysis, and printed samples were cured and sintered at various temperatures under high vacuum. Density measurements, elemental analysis, phase formation and microstructure of as-printed, cured and sintered samples were investigated compared with mechanical properties. Results indicate that a fully densified parts with densities of up to 99.6%, as well as favorable mechanical properties (hardness of up to 238 HV 0.1 and UTS of up to 612 MPa) may be obtained for the sample sintered at 1280 °C. It is concluded that alloy 625 produced by powder bed binder jet printing can achieve similar density and mechanical properties as cast alloy 625.

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“…This is because that the addition of rare earth element in the steel can promote the formation of surface spinel oxides at hightemperature [23,24]. The presence of these spinel oxides can better prevent the interior of steel from further oxidation [9,16,23].…”

Section: Oxidation Dynamic Curvesmentioning

confidence: 99%

“…Some studies have found that the addition of alloying elements can significantly improve the high temperature oxidation resistance of heat resistant steel [7,9]. According to our knowledge, the rare earth elements have a significant effect on the high temperature oxidation capacity of heat resistant steel [8,10].…”

Section: Introductionmentioning

confidence: 96%

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High temperature oxidation behavior of heat resistant steel with rare earth element Ce

Wang¹,

Zheng²,

Zheng³

et al. 2020

Mater. Res. Express

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This study examined the oxidation properties of rare earth steel at high temperatures (600°C-900°C) in the air atmosphere by using Scanning Electronic Microscope (SEM) with an energy dispersive spectroscopy (EDS), x-ray diffraction analyzer (XRD) and atomic force microscopy (AFM) analysis method. High temperature oxidation experiment showed that rare earth element Ce played a very good antioxidant effect with the increasing oxidation temperature. After continuous oxidation at 600°C, 700°C, 800°C and 900°C for 150 h, the mass gain of the rare earth steel were 1.25 mg cm −2 , 2.41 mg cm −2 , 12.34 mg cm −2 , and 13.37 mg cm −2 , respectively. In comparison, the matrix steel under the same conditions were 1.31 mg cm −2 , 2.94 mg cm −2 , 13.98 mg cm −2 , and 15.63 mg cm −2 , respectively. AFM features of the oxidized surface confirmed that the rare earth element Ce could inhibit the growth rate of the oxide in the early stage of oxidation, and preferentially promote the formation of the spinel oxide. The surface-dense spinel oxide (Fe, Cr, Ni, Mn) 3 O 4 , the enrichment of Cr-containing layer in the middle, and the formation of the Si-rich oxide in the inner layer all affected the high-temperature oxidation resistance of the rare earth steel.

show abstract

A comparative study of oxide scales grown on stainless steel and nickel-based superalloys in ultra-high temperature supercritical water at 800 °C

Cited by 133 publications

References 47 publications

On-line monitoring of oxide formation and dissolution on alloy 800H in supercritical water

On-line monitoring of oxide formation and dissolution on alloy 800H in supercritical water

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

High temperature oxidation behavior of heat resistant steel with rare earth element Ce

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