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The determination of fracture strains of growing surface oxides on mild steel at high temperatures
Springer Science and Business Media LLC - Tập 9 - Trang 161-169 - 1975
A new technique for measuring the tensile properties of surface coatings at high temperatures is described. It is shown to be capable of measuring the properties of growing surface scales on metals and has been applied initially to the measurement of fracture strains of growing surface oxides on mild steel at high temperatures. The fracture strains determined ranged from 1.1×10−4 to 2.3×10−4 over ...... hiện toàn bộ
Effect of Water Vapor on the Spallation of Thermal Barrier Coating Systems During Laboratory Cyclic Oxidation Testing
Springer Science and Business Media LLC - Tập 73 - Trang 83-93 - 2009
The effect of water and water vapor on the lifetime of Ni-based superalloy samples coated with a typical thermal barrier coating system—β-(Ni,Pt)Al bond coat and yttria stabilized zirconia (YSZ) top coat deposited by electron beam physical vapor deposition (EB-PVD) was studied. Samples were thermally cycled to 1,150 °C and subjected to a water-drop test in order to elucidate the effect of water va...... hiện toàn bộ
High Temperature Oxidation of Steels in Air and CO2–O2 Atmosphere
Springer Science and Business Media LLC - Tập 64 - Trang 319-329 - 2005
Three kinds of hot rolled steel slabs, viz. high strength steel, bake hardened steel and low carbon steel, were oxidized isothermally between 1100 and 1250 °C for up to 2 hr in 1 atm of air and an 85%N2–10%CO2–5%O2 gas mixture. The steels were oxidized in a similar fashion in both the atmospheres. The oxidation process followed an initial linear rate law, which then gradually transformed to a near...... hiện toàn bộ
Oxidation-Rate Excursions During the Oxidation of Copper in Gaseous Environments at Moderate Temperatures
Springer Science and Business Media LLC - Tập 60 - Trang 393-408 - 2003
The kinetics of oxidation of copper powders in oxygen and in dry and humid air was investigated using thermogravimetric analysis (TGA). The extent of oxidation grew linearly with time until the weight-based thickness of the oxide film reached 0.13–1.22 nm, depending on the temperature. Between 30 and 90°C there was little difference between the kinetic curves observed in air and in oxygen, respect...... hiện toàn bộ
Corrosion of 9Cr Steel in CO2 at Intermediate Temperature I: Mechanism of Void-Induced Duplex Oxide Formation
Springer Science and Business Media LLC - Tập 77 - Trang 27-55 - 2011
Under CO2 exposure at an intermediate temperature, typically 550 °C, 9Cr–1Mo steel forms a duplex oxide scale made of an outer magnetite layer and an almost-as-thick inner Fe–Cr rich spinel oxide layer. It is proposed that the inner Fe–Cr spinel layer grows according to a mechanism involving void formation at the oxide/metal interface. The driving force for pore formation is the outward magnetite ...... hiện toàn bộ
Acidic and basic fluxing of Ni-base superalloys in a 90Na2SO4-10K2SO4 melt at 1173 K
Springer Science and Business Media LLC - Tập 19 - Trang 201-229 - 1983
The influence of the electrode potential on the corrosion behavior of a series of Ni-base superalloys has been investigated in a (mole %) 90Na2SO4-10K2SO4 melt at 1173 K. Acidic fluxing occurs at positive potentials and basic fluxing at negative potentials. A protective scale is formed in an intermediate (neutral) potential range on high chromium-containing alloys such as IN-738LC, IN-939, IN-597,...... hiện toàn bộ
Effect of creep on the oxidation characteristics of Fe-Si alloys at 973–1073 K
Springer Science and Business Media LLC - Tập 18 - Trang 115-126 - 1982
Studies of the simultaneous creep and oxidation of Fe-1Si and Fe-4Si alloys at a constant tensile stress of 16 N· mm−2 at 973–1073 K have shown that scales formed at oxygen partial pressures of 20–1013 mbar were thicker by a factor of 2 than those formed on uncrept specimens. Scales on uncrept alloys comprised alternate layers of wustite and fayalite, whereas scales on crept alloys exhibited an ad...... hiện toàn bộ
The Oxidation Behavior of Oxide-Dispersed β-NiAl: I. Short-Term Performance at 1200°C
Springer Science and Business Media LLC - - 1998
Oxide dispersions were added to β-NiAlalloys using a powder-metallurgy technique. During 20,2-hr cycles at 1200°C, scale adhesion of theexternal alpha Al3O2 was improvedby the addition of Y2O3 and ZrO2. Relative to an undoped, castNiAl alloy, no improvement was observed forTiO2 and HfO2 additions andnegative effects were observed forAl2O3 andLa2O3 additions. The variouscation additions also had di...... hiện toàn bộ
A high-temperature oxidation-resistant Fe-Mn-Al-Si alloy
Springer Science and Business Media LLC - Tập 21 - Trang 71-79 - 1984
To develop satisfactory alloys without Cr or Ni for high-temperature application up to 1100†C, three alloys based on Fe-10%Al-Si with differing fourth (or fifth) element additions were oxidized in air at 1100°Cfor 24 hr. A low carbon, Fe-30Mn-10Al-Si alloy exhibited excellent high-temperature oxidation resistance. The total weight gain for 24 hr oxidation in air at 1100°C was only 1.03 mg/cm
2. A...... hiện toàn bộ
Microstructural Investigation of the Thermally Grown Oxide on Grain-Refined Overdoped NiAl–Zr
Springer Science and Business Media LLC - Tập 92 - Trang 227-242 - 2019
The thermally grown oxide on sputter-deposited NiAl–0.09Zr was studied using transmission electron microscopy (TEM) and transmission Kikuchi diffraction (TKD) to microstructurally assess its oxidation resistance. Sputter deposition resulted in a refined grain size of 0.3 μm that was compared to extruded NiAl–Zr with a grain size of approximately 25 μm. Thermogravimetric oxidation of the sputter-de...... hiện toàn bộ
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