Low-temperature tracer diffusion of nickel in Ni3Al intermetallic

Čermák, Jan; Stloukal, Ivo

doi:10.1016/s1359-6462(96)00400-9

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…Although diffusion and defects in stoichiometric Ni 3 Al have been extensively studied both experimentally [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and theoretically [21][22][23][24][25][26][27][28], relatively little work has been done at offstoichiometric composition [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

Duan

2007

J. Phys.: Condens. Matter

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This paper presents dynamics simulation results of diffusion in offstoichiometric Al-rich Ni 3 Al (Ni 73 Al 27 ) at temperature ranging from 1300 to 1550 K. The interatomic forces are described by the Finnis-Sinclair type N-body potentials. Particular attention is devoted to the effect of the extra 2% of Al atoms sitting on the Ni sublattice as antisite point defects (Al Ni ) on diffusion. Simulation results show that Ni atoms mainly diffuse through the Ni sublattice at the temperatures investigated. Al atoms diffuse via both the intrasublattice and antistructure bridge (ASB) mechanisms. The contribution to Al diffusion from the ASB mechanism decreases at the lower temperature (T < 1400 K). The presence of antisite point defects (Al Ni ) enhances both Al and Ni diffusion in Ni 73 Al 27 . The Ni-Al coupled diffusion effect is observed and understood at the atomic level for the first time.

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Section: Introductionmentioning

confidence: 99%

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

Duan

2007

J. Phys.: Condens. Matter

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“…The growth of Ni 3 Al is controlled by the grain boundary diffusion [90]. It has a propensity of long-range ordering with a strong attractive force between Ni and Al [91]. It also shows flow stress anomaly which generally states that the tribological properties of Ni 3 Al increase with the increase in temperature up to 650 °C [92].…”

Section: The Nixaly Systemmentioning

confidence: 99%

“…Moreover, the crystallize size of the bulk Ni 3 Al remains stable and defect recovers when the annealing temperature is below 550 °C. When the annealing temperature is provided beyond 750 °C, the increment in crystallize size is abnormal [90][91][92]135]. Li et al [37] deposited Ni 3 Al film on Ni substrate via magnetron sputtering.…”

Section: Post Deposition Parametersmentioning

confidence: 99%

A review of mechanical and tribological properties of Ni₃Al-based coatings-synthesis and high-temperature behavior

Tiwari,

Rao,

Kharb

et al. 2023

Phys. Scr.

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Ni-based superalloys and thin films have drawn the attention of researchers because of their extraordinary properties. In particular, Nickel Aluminides like Ni3Al thin films show excellent mechanical and tribological properties. They are good candidates for high-temperature applications as they show excellent corrosion and oxidation resistance properties. Several researchers have synthesized Ni3Al thin films via Chemical vapor deposition methods (CVD) and physical vapor deposition methods (PVD). Most of them have synthesized Ni3Al thin film via magnetron sputtering because of microstructural homogeneity and less contamination achieved by this process. To achieve better properties of these films, many alterations in terms of deposition parameters and doping have been experimented by researchers. This work reflects the review of work done in the area of depositing Ni3Al-based thin films via different techniques for high-temperature applications.

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“…Since the rate of structural changes is -to a great extent -diffusion controlled, it is understood that the knowledge of diffusion kinetic parameters is of a substantial importance for the assessment of functional durability of final products. In preceding paper [2] the diffusion of alloy components Fe and Mo was studied in as received state and in relaxed structures of amorphous alloy Fe 76 Mo 8 Cu 1 B 15. All structure states contained a certain portion of crystalline phase in the surface area, where the penetration profiles c(x,t) were measured.…”

Section: Introductionmentioning

confidence: 99%

Tracer Diffusion of Molybdenum in Crystallized Fe79-yMo8Cu1B12+y Alloy

Čermák

Stloukal

2007

DDF

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99Mo tracer diffusion in Fe79-yMo8Cu1B12+y (y = 0, 3, 5) alloys was studied using serial sectioning method in the temperature range 573 – 773 K. Sputtering by Ar+ ions was applied as a sectioning technique. The measurement was carried out with the ribbon-like samples prepared by planar flow casting technique and crystallized before the diffusion experiment by a thermal shock in vacuum. The structure was formed by areas of three distinct types differing in chemical composition r = at. % Mo / at. % Fe: (i) r = 0.02 (crystallites of Fe, mean size d ~ 150 nm), (ii) r = 0.09 (relaxed phase; d ~ 150 nm) and (iii) r = 0.83 (boride phase; d ~ 30 nm). The measured profiles were linear in co-ordinates ln cMo vs. x1.5 (cMo – concentration of Mo in depth x), indicating that the diffusion of 99Mo was controlled by „type A-B” kinetics.

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Low-temperature tracer diffusion of nickel in Ni3Al intermetallic

Cited by 6 publications

References 5 publications

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

A review of mechanical and tribological properties of Ni₃Al-based coatings-synthesis and high-temperature behavior

Tracer Diffusion of Molybdenum in Crystallized Fe<sub>79-y</sub>Mo<sub>8</sub>Cu<sub>1</sub>B<sub>12+y</sub> Alloy

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Low-temperature tracer diffusion of nickel in Ni3Al intermetallic

Cited by 6 publications

References 5 publications

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni3Al

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni3Al

A review of mechanical and tribological properties of Ni3Al-based coatings-synthesis and high-temperature behavior

Tracer Diffusion of Molybdenum in Crystallized Fe<sub>79-y</sub>Mo<sub>8</sub>Cu<sub>1</sub>B<sub>12+y</sub> Alloy

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Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

Atomistic simulations of diffusion mechanisms in off-stoichiometric Al-rich Ni₃Al

A review of mechanical and tribological properties of Ni₃Al-based coatings-synthesis and high-temperature behavior