Cyclic oxidation behavior of Ni3Al-basedsuperalloy

Li, Jingan; Peng, Yuanyi; Zhang, Jianbo; Jiang, Shan; Yin, Sheping; Ding, Jian; Wu, Yuting; Wu, Jing; Chen, Xueguang; Xia, Xingchuan; He, Xinbo; Liu, Yongchang

doi:10.1016/j.vacuum.2019.108938

Cited by 19 publications

(4 citation statements)

References 53 publications

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“…It can be seen that the pre-strain process has no significant effect on the type of oxidation product. After 5 min of oxidation, the oxidation products on both the original and pre-strained alloys are Al 2 O 3 , NiO, NiFe 2 O 4 and HfO 2 , while after 30 min of oxidation, unstable spinel NiAl 2 O 4 appears due to the reaction between Al 2 O 3 and NiO [22].…”

Section: Growth Behavior Of Short-term Oxidation Productsmentioning

confidence: 99%

“…For instance, the outer NiO and inner Al 2 O 3 structures formed during the oxidation process of Ni 3 Al-based superalloys play a crucial role in determining the alloy's antioxidant properties [18]. In addition to applying protective layers to the matrix [19][20][21], the antioxidant properties of the alloys can be enhanced through the processes of heat treatment [8,22,23] and alloying [24,25]. These methods have achieved good results, although it is challenging to achieve further significant improvements in the antioxidant properties of superalloys.…”

Section: Introductionmentioning

confidence: 99%

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Oxidation Behavior of Pre-Strained Polycrystalline Ni3Al-Based Superalloy

Guo,

Ding,

Wang

et al. 2024

Materials

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The harsh service environment of aeroengine hot-end components requires superalloys possessing excellent antioxidant properties. This study investigated the effect of pre-strain on the oxidation behavior of polycrystalline Ni3Al-based superalloys. The growth behaviors of oxidation products were analyzed by scanning electron microscope, transmission electron microscope, X-ray Photoelectron Spectroscopy and Raman spectroscopy. The results indicated that the 5% pre-strained alloys exhibited lower mass gain, shallower oxidation depth and more compact oxide film structures compared to the original alloy. This is mainly attributed to the formation of rapid diffusion paths for Al atoms diffusing to the surface under 5% pre-strain, which promotes the faster formation of protective Al2O3 film while continuing to increase the pre-strain to 25% results in less protective transient oxidation behavior being aggravated due to the increase in dislocation density within the alloy, which prevents the timely formation of the protective Al2O3 film, resulting in uneven oxidation behavior on the alloy.

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Section: Growth Behavior Of Short-term Oxidation Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Pre-Strained Polycrystalline Ni3Al-Based Superalloy

Guo,

Ding,

Wang

et al. 2024

Materials

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“…[145] Alkaline metal, alkaline earth metal, and transition metal clusters, including Li, Na, Mg, Ag, and Ta, were also investigated (Figure 20b). [146][147][148][149][150][151][152] Ju et al studied the structure and stability of neutral and charged (FeO) n (n = 1-8) clusters using the CALYPSO code (Figure 20c) and proposed two most stable geometries, (FeO) 5 and (FeO) 4 À/þ cluster. [153] Multicomponent metal and nonmetal clusters were also widely studied.…”

Section: Clusters In Vacuummentioning

confidence: 99%

Intelligent Structure Searching and Designs for Nanoclusters: Effective Units in Atomic Manufacturing

Gao,

Zhao,

Chang

et al. 2024

Advanced Intelligent Systems

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Clusters, an aggregation of several to thousands of atoms, molecules, or ions, are the building blocks of novel functional materials by atomic manufacturing and exhibit excellent applications in catalysis, quantum information, and nanomedicine. The evolution of cluster structures has been studied for many years. Many effective structural search methods, such as genetic algorithm, basin‐hopping, and so on, have been developed. However, the efficient execution of these methods relies on precise energy calculators, such as density functional theory (DFT) calculations. Up to now, limited by computational methods and capabilities, the researches mainly focus on free‐standing clusters, which are different from clusters in practical applications. Recently, the rapid development of big data‐driven machine learning is expected to replace DFT for high‐precision large‐scale computing. In this review, the present cluster search methods and challenges currently faced have been summarized. It is proposed that the development of artificial intelligence has the potential to solve some practical problems including the structural and properties evolution of clusters in complex environment, causing revolutionary developments in the fields of catalysis, quantum information, and nanomedicine based on clusters.

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“…As one of the intermetallic compounds, Ni 3 Al has many excellent characteristics, such as low density, a high melting point, high temperature oxidation resistance, excellent creep resistance, and outstanding high temperature wear resistance [1][2][3][4]. Furthermore, it has a special abnormal phenomenon, where its yield strength increases with temperature due to its long-range ordered crystal structure of L1 2 type.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Wear Resistance of a Cr7C3 Reinforced Ni3Al Composite Coating Prepared by Laser Cladding

et al. 2022

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Using Cr7C3/Ni3Al alloyed powder and Cr3C2/Ni3Al mixed powder, laser cladding was carried out to prepare a Cr7C3 reinforced Ni3Al composite cladding layer. The microstructure and tribological properties of the cladding materials were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and wear tests. The results indicate that the microstructure of the Cr7C3/Ni3Al alloyed powder cladding layer contains mainly Ni3Al, NiAl, and in situ-formed Cr7C3, whereas Cr3C2 occurs in the Cr3C2/Ni3Al mixed powder cladding layer. The friction coefficient and wear loss of the alloyed powder cladding layer are about 0.1 and 0.75 mg, respectively, which are less than those of the mixed powder cladding layer (0.12 and 0.8 mg). Moreover, the alloyed powder cladding layer is much friendlier to its counterpart. The counterpart’s loss weight of the alloyed powder cladding layer decreases 42.2% than the mixed powder cladding layer. The reason can be attributed to the homogeneous distribution of fine in situ-formed Cr7C3 in the alloyed powder cladding materials, which can effectively separate the friction pair, improving the wear resistance of the cladding materials.

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Cyclic oxidation behavior of Ni3Al-basedsuperalloy

Cited by 19 publications

References 53 publications

Oxidation Behavior of Pre-Strained Polycrystalline Ni3Al-Based Superalloy

Oxidation Behavior of Pre-Strained Polycrystalline Ni3Al-Based Superalloy

Intelligent Structure Searching and Designs for Nanoclusters: Effective Units in Atomic Manufacturing

Microstructure and Wear Resistance of a Cr7C3 Reinforced Ni3Al Composite Coating Prepared by Laser Cladding

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