Influence of applied electric field on atom diffusion behavior and mechanism for W/NiFe interface in diffusion bonding of Steel/NiFe interlayer/W by spark plasma sintering

Lü, Chao; Yang, Jian; Zhao, Yüe; Lei, Xuanwei; Huang, Jihua; Chen, Shuhai; Zheng, Yi

doi:10.1016/j.apsusc.2020.148516

Cited by 7 publications

(2 citation statements)

References 75 publications

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“…Therefore, the diffusion activation energy E a consists of two parts: vacancy formation energy E f and atom migration energy E m , which can be expressed by Eq. ( 3) [36,38,39]:…”

Section: Formation Mechanism Of Oxygen Vacancies During Laser 3d Prin...mentioning

confidence: 99%

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Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Liu

Shen

et al. 2022

J Adv Ceram

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Laser three-dimensional (3D) printing has become a significant technique to fabricate high-performance Al2O3-based eutectic ceramics based on melt growth. However, oxygen vacancies are inevitable crystal defects during this process, and their formation mechanism and roles in the as-deposited ceramics are still unclear. In this paper, Al2O3/GdAlO3/ZrO2 ternary eutectic ceramics were prepared by laser 3D printing, and the formation mechanism of the oxygen vacancies was revealed by conducting a well-designed annealing experiment. In addition, the effects of the oxygen vacancies on the structure and mechanical property of the as-solidified eutectic ceramic were investigated. The formation of oxygen vacancies is revealed to be a result of the transfer of oxygen atoms from the oxide ceramic to the oxygen-deficient atmosphere by means of vacancy migration mechanism. Besides, the presence of oxygen vacancies has no obvious effects on crystalline structure and microstructure of the additively manufactured eutectic ceramic. However, the chemical bond property changes to some extent due to the formation of these crystal defects, which may affect the mechanical property of the as-deposited eutectic ceramic. It is found that the hardness decreases by 3.9%, and the fracture toughness increases by 13.3% after removing the oxygen vacancies. The results may provide a potential strategy to regulate the mechanical property of the oxide ceramic materials.

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“…Therefore, the diffusion activation energy E a consists of two parts: vacancy formation energy E f and atom migration energy E m , which can be expressed by Eq. ( 3) [36,38,39]:…”

Section: Formation Mechanism Of Oxygen Vacancies During Laser 3d Prin...mentioning

confidence: 99%

“…Thus, its E a is determined by E f . It is well accepted that the surface atoms are more active than the interior atoms [39], leading to a lower E f on the surface than that of the interior region. Consequently, the E a of the surface atom is smaller than that of the interior atom.…”

Section: Formation Mechanism Of Oxygen Vacancies During Laser 3d Prin...mentioning

confidence: 99%

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Liu

Shen

et al. 2022

J Adv Ceram

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A CuZnMnNiSi alloy interlayer reinforced W alloy/304 stainless steel composite with excellent interfacial strength

Sun

Han

et al. 2023

International Journal of Refractory Metals and Hard Materials

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Diffusion bonding of dissimilar titanium alloys via surface nanocrystallization treatment

Sun

2022

Journal of Materials Research and Technology

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Influence of applied electric field on atom diffusion behavior and mechanism for W/NiFe interface in diffusion bonding of Steel/NiFe interlayer/W by spark plasma sintering

Cited by 7 publications

References 75 publications

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

A CuZnMnNiSi alloy interlayer reinforced W alloy/304 stainless steel composite with excellent interfacial strength

Diffusion bonding of dissimilar titanium alloys via surface nanocrystallization treatment

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