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Seal, Sudipta; Kuiry, S. C.; Bracho, Leyda A.

doi:10.1023/a:1014878402960

Cited by 31 publications

(5 citation statements)

References 26 publications

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“…6 e depicts the high-resolution O 1 s scan and confirms the presence of significant amounts of hydroxide at the surface. These results agree with those in the literature 19 , 20 as some researchers have reported that the oxides present at the surface of IN 738 alloys at high-temperature are NiO, Cr 2 O 3 , TiO 2 , and Al 2 O 3 . Note that Ni(OH) 2 was also observed depending on handling and storage conditions 21 .…”

Section: Resultssupporting

confidence: 93%

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A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Galindo,

Espiritu,

Gutierrez

et al. 2024

Sci Rep

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A new method to assess the quality of additive manufacturing (AM) metal powders using the triboelectric charging concept is demonstrated using CpTi, Ti6Al4V, AlSi10Mg, IN 738, and SS 316L powders. For each powder tested, the surface chemical composition was first analyzed using X-ray photoelectron spectroscopy (XPS) to determine the composition of the passivation layer. Some modifications to the current GranuCharge™ setup, developed by GranuTools™, were then performed by incorporating a flow rate measuring tool to assess how tribocharging is affected as a function of flow rate. Variations in the tribocharging response have been found with the flow rate of CpTi, AlSi10Mg and SS 316L powders. Moreover, results suggest that the tribocharging behavior might not be the same even with powders fabricated with the same passivation process. Finally, the compressed exponential model of Trachenko and Zaccone was used to reproduce the tribocharging behavior of the powders. The models were found to work best when the stretch constant β = 1.5, which is identical to the value found in other systems such as structural glasses, colloidal gels, entangled polymers, and supercooled liquids, which experience jamming when motion of individual particles become restricted, causing their motion to slow down.

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Section: Resultssupporting

confidence: 93%

“…Unfortunately, after extensive research, no literature is available on XPS analysis of IN 738 at room temperature, preventing reliable comparisons. However, some studies at high temperature (> 900 °C) showed the presence of Ti and Al at the surface of samples 19 , 20 . Consequently, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Galindo,

Espiritu,

Gutierrez

et al. 2024

Sci Rep

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“…However, it has been shown that although iron diffusion is strongly dependent on the method of preparation, this is not the case for chromium. 25…”

Section: Resultsmentioning

confidence: 99%

“…However, it has been shown that although iron diffusion is strongly dependent on the method of preparation, this is not the case for chromium. 25 After deposition, X-ray diffraction showed that the BiFeCoMo layer consisted of only two phases αBi 2 Mo 3 O 12 and βFe 0.67 Co 0.33 MoO 4 , which are by chance the ones sought for the synergetic effect in powdered catalysts (Fig. 5).…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Chemical vapor deposition (DLI-CVD) and characterization of multiphasic molybdate-based catalysts for propene oxidation

Millet

Bellieres-Baca

Aouine³

et al. 2022

Catal. Sci. Technol.

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“…The improvement of high-temperature oxidation resistance is one of the important issues for practical use of these superalloys. There are some papers about the oxidation experiment of conventionally-cast superalloys [7][8][9][10], 1st generation single-crystal superalloys [11,12] and 2nd generation single-crystal superalloys [13]. However, few studies have so far been made at the oxidation resistance of the latest Ni-base superalloys containing Ru.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Ru-Containing Ni-Base Single-Crystal Superalloys

Kawagishi

Sato

et al. 2006

MSF

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The 4th and advanced generation Ni-base single crystal superalloys, which contain large amounts of refractory metals for strengthening and platinum group metals, e.g., Ru, for TCP-phase prevention, show excellent high-temperature strengths. However, these alloying elements seem to decrease high-temperature oxidation resistance. In this study, Ni-base superalloys with various amounts of Ta, Re and Ru were examined in isothermal and cyclic exposures at 1373K to investigate the effect on the oxide growth rate and resistance to scale spallation. Structures of the oxide for the alloys were analyzed by XRD, SEM and EDX, and the oxidation kinetics is discussed. Ru and Re were found to degrade the oxidation resistance by the vaporization of their oxide. Ta-rich oxide in the spinel layer affects to stabilize ruthenium and rhenium oxide in the scale and improve the oxidation resistance of Ru-containing Ni-base superalloys.

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Untitled

Cited by 31 publications

References 26 publications

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

A method to assess the quality of additive manufacturing metal powders using the triboelectric charging concept

Chemical vapor deposition (DLI-CVD) and characterization of multiphasic molybdate-based catalysts for propene oxidation

Oxidation Behavior of Ru-Containing Ni-Base Single-Crystal Superalloys

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