Al/Ni formation reactions: characterization of the metastable Al9Ni2 phase and analysis of its formation

Blobaum, K M; Heerden, D. Van; Gavens, A. J.; Weihs, Timothy P.

doi:10.1016/s1359-6454(03)00211-8

Cited by 173 publications

(119 citation statements)

References 33 publications

Supporting

Mentioning

104

Contrasting

Unclassified

Order By: Relevance

“…To get repeatable thicknesses in multilayer system the stability of the power supply of the magnetron gun and argon pressure in the chamber should be stable The most important is to find such deposition parameters for which the intermixing region between films is as small as possible. The intermixed region aggravates heat transport in the reaction zone [8] and decreases its velocity [10]. The similar effects one can observe in case of dissolution of the reaction bed by the products of the reaction.…”

Section: Introductionsupporting

confidence: 59%

See 1 more Smart Citation

Computer Controlled System for the Magnetron Sputtering Deposition of the Metallic Multilayers

Marszałek¹,

Stȩpień²,

Mania³

2014

International Journal of Electronics and Telecommunications

View full text Add to dashboard Cite

Abstract-Deposition of the metallic multilayers is a part of the scientific program on the chemical reaction leading to intermetallic compound formation. This reaction is known as self propagation high temperature synthesis (SHS). The key problem in this investigation is to produce the metallic multilayer system with good repeatability of thin films thicknesses. Thin should be thin, parallel and with low volume of intermixing region between components. Computer control system for the pulsed (mid frequency MF) magnetron sputtering equipment dedicated for metallic multilayers deposition is presented in this paper. The rotation velocity of the sample holder and the gas inlet through membrane valves are the main parameters controlled by the system. Parameters of the magnetron gun power supply, sample temperature and technological gas pressure are registered. The process cards which define all process parameters are collected for each dedicated process type. All cards are collected in a process cards library which permits for full automatization of all operations. Software was written in a graphical LabVIEW environment.

show abstract

Section: Introductionsupporting

confidence: 59%

“…First papers on SHS [1][2][3][4][5][6][7] were published at the end of eighties last century. The idea to substitute the micropowder mixture by multilayer system especially in NiAl intermetallic compound was started last ten years [8][9][10][11]. The multilayer system should be precisely characterized.…”

Section: Introductionmentioning

confidence: 99%

Computer Controlled System for the Magnetron Sputtering Deposition of the Metallic Multilayers

Marszałek¹,

Stȩpień²,

Mania³

2014

International Journal of Electronics and Telecommunications

View full text Add to dashboard Cite

show abstract

“…Advanced fabrication techniques for such systems include physical vapor deposition whereby the individual layers are sputter deposited on a substrate. [2][3][4][5][6][7][8][9] Typically, individual layers have thicknesses in the order of tens of nanometers.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous experimental investigations have focused on the self-propagating nature of intermetallic formation reactions and associated phase transformations. 2,[10][11][12] The large amount of localized heat due to exothermic mixing in the multilayers has also motivated a number of practical applications, such as welding, brazing, and soldering. [13][14][15][16][17][18][19][20] Recently, Joress et al 21 conducted experiments on Zr-Al nanolaminate foils with varying compositions and microstructures and focused on investigating the oxidation properties of the nanolaminate following the completion of the anaerobic reaction.…”

Section: Introductionmentioning

confidence: 99%

Development of a reduced model of formation reactions in Zr-Al nanolaminates

Vohra

Winokur

Overdeep

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

A computational model of anaerobic reactions in metallic multilayered systems with an equimolar composition of zirconium and aluminum is developed. The reduced reaction formalism of M. Salloum and O. M. Knio, Combust. Flame 157(2): 288–295 (2010) is adopted. Attention is focused on quantifying intermixing rates based on experimental measurements of uniform ignition as well as measurements of self-propagating front velocities. Estimates of atomic diffusivity are first obtained based on a regression analysis. A more elaborate Bayesian inference formalism is then applied in order to assess the impact of uncertainties in the measurements, potential discrepancies between predictions and observations, as well as the sensitivity of predictions to inferred parameters. Intermixing rates are correlated in terms of a composite Arrhenius law, which exhibits a discontinuity around the Al melting temperature. Analysis of the predictions indicates that Arrhenius parameters inferred for the low-temperature branch lie within a tight range, whereas the parameters of the high-temperature branch are characterized by higher uncertainty. The latter is affected by scatter in the experimental measurements, and the limited range of bilayers where observations are available. For both branches, the predictions exhibit higher sensitivity to the activation energy than the pre-exponent, whose posteriors are highly correlated.

show abstract

“…When a small but concentrated pulse of energy such as an electric spark or a thermal pulse is provided, highly exothermic, self-propagating chemical reactions can be triggered that proceed very quickly. The Ni-Al multilayer is often used as model system and as such it has been widely investigated systems both in experiment [1][2][3][4][5] and in continuum studies [6][7][8][9][10][11][12][13][14][15][16]. Recently, these multilayers have received increased attention because of their potential application as controllable, localized heat sources for joining microelectronic components without damage and as useful tools for forming near-net shape intermetallics [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion of Ni-Al multilayers: A continuum and molecular dynamics study

Falk

Weihs

2013

Journal of Applied Physics

View full text Add to dashboard Cite

Molecular dynamics simulation of Al/Ni multilayered foils reveals a range of different reaction pathways depending on the temperature of the reaction. At the highest temperatures Fickian interdiffusion dominates the intermixing process. At intermediate temperatures Ni dissolution into the Al liquid becomes the dominant mechanism for intermixing prior to formation of the B2 intermetallic phase. At lower temperatures the B2 intermetallic forms early in the reaction process precluding both of these mechanisms. Interdiffusion and dissolution activation energies as well as diffusion prefactors are extracted from the simulations.

show abstract

Al/Ni formation reactions: characterization of the metastable Al9Ni2 phase and analysis of its formation

Cited by 173 publications

References 33 publications

Computer Controlled System for the Magnetron Sputtering Deposition of the Metallic Multilayers

Computer Controlled System for the Magnetron Sputtering Deposition of the Metallic Multilayers

Development of a reduced model of formation reactions in Zr-Al nanolaminates

Interdiffusion of Ni-Al multilayers: A continuum and molecular dynamics study

Contact Info

Product

Resources

About