Thermal stability of Al–Mo thin film alloys

Ivkov, Jovica; Salamon, Krešimir; Radić, Nikola; Sorić, Marija

doi:10.1016/j.jallcom.2015.06.022

Cited by 16 publications

(2 citation statements)

References 28 publications

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“…Mwema et al reviewed the effect of different parameters on the structure of thin Al films [17]. It was shown that deposition conditions, such as deposition rate [18], alloy composition [19], substrate type, substrate temperature, and roughness [20] had a significant influence on the morphology and structure of the formed film. It was revealed that the structure is sensitive to the deposition technique [14] and film thickness as well.…”

Section: Resultsmentioning

confidence: 99%

Deposition of Al Thin Film on Steel Substrate: The Role of Thickness on Crystallization and Grain Growth

Khachatryan

Lee

Kim

et al. 2018

Metals

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In this study, we deposited aluminum (Al) films of different thicknesses on steel substrate and examined their phase, microstructure, and film growth process. We estimated that films of up to 30 nm thickness were mainly amorphous in nature. When the film thickness exceeded 30 nm, crystallization was observed. The further increase in film thickness triggered grain growth, and the formation of grains up to 40 nm occurred. In such cases, the Al film had a cross-grained structure with well-developed primary grains networks that were filled with small secondary grains. We demonstrated that the microstructure played a key role in optical properties. The films below 30 nm showed higher specular reflection, whereas thicker films showed higher diffuse reflections.

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Section: Resultsmentioning

confidence: 99%

Deposition of Al Thin Film on Steel Substrate: The Role of Thickness on Crystallization and Grain Growth

Khachatryan

Lee

Kim

et al. 2018

Metals

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“…As has been demonstrated previously, annealing of Al-Mo(110) adsorbate systems leads to interdiffusion of the components and the formation of the alloy with twelve equilibrium phases with the dominant MoAl 12 stoichiometry [ 17 , 18 ]. Other studies also predict formation of wealth of thin films alloys Al x Mo 100−x in a wide range of x values [ 19 ]. According to the LEED pattern, shown in Figure 1 , the structure of as-deposited aluminum film at θ = 2 ML corresponds to Al(111).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Aluminum–Molybdenum Alloy Thin Film Oxide and Study of Molecular CO + NO Conversion on Its Surface

et al. 2022

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Adsorption and interaction of carbon monoxide (CO) and nitric oxide (NO) molecules on the surface of bare Al-Mo(110) system and on that obtained by its in situ oxidation have been studied in ultra-high vacuum (base pressure: ca. 10−8 Pa) by means of Auger and X-ray photoelectron spectroscopy (AES, XPS), low energy electron diffraction (LEED), reflection–absorption infrared and thermal desorption spectroscopy (RAIRS, TDS), and by the work function measurements. In order to achieve the Al-Mo(110) alloy the thin aluminum film of a few monolayers thick was in situ deposited onto the Mo(110) crystal and then annealed at 800 K. As a result of Al atoms diffusion into the Mo(110) subsurface region and the chemical reaction, the surface alloy of a hexagonal atomic symmetry corresponding to Al2Mo alloy is formed. The feature of thus formed surface alloy regarding molecular adsorption is that, unlike the bare Mo(110) and Al(111) substrates, on which both CO and NO dissociate, adsorption on the alloy surface is non-dissociative. Moreover, adsorption of carbon monoxide dramatically changes the state of pre-adsorbed NO molecules, displacing them to higher-coordinated adsorption sites and simultaneously tilting their molecular axis closer to the surface plane. After annealing of this coadsorbed system up to 320 K the (CO + NO → CO2 + N) reaction takes place resulting in carbon dioxide desorption into the gas phase and nitriding of the substrate. Such an enhancement of catalytic activity of Mo(110) upon alloying with Al is attributed to surface reconstruction resulting in appearance of new adsorption/reaction centers at the Al/Mo interface (steric effect), as well as to the Mo d-band filling upon alloying (electronic effect). Catalytic activity mounts further when the Al-Mo(110) is in situ oxidized. The obtained Al-Mo(110)-O ternary system is a prototype of a metal/oxide model catalysts featuring the metal oxides and the metal/oxide perimeter interfaces as a the most active reaction sites. As such, this type of low-cost metal alloy oxide models precious metal containing catalysts and can be viewed as a potential substitute to them.

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Elastic Energy Fraction as the Phenomenological Connection Between Electrical, Mechanical and Thermal Properties of the Al–(Nb, Mo, Ta, W) Amorphous Thin Films

et al. 2019

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Thermal stability of Al–Mo thin film alloys

Cited by 16 publications

References 28 publications

Deposition of Al Thin Film on Steel Substrate: The Role of Thickness on Crystallization and Grain Growth

Deposition of Al Thin Film on Steel Substrate: The Role of Thickness on Crystallization and Grain Growth

Preparation of Aluminum–Molybdenum Alloy Thin Film Oxide and Study of Molecular CO + NO Conversion on Its Surface

Elastic Energy Fraction as the Phenomenological Connection Between Electrical, Mechanical and Thermal Properties of the Al–(Nb, Mo, Ta, W) Amorphous Thin Films

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