Production of Aluminide Layers on AISI 304 Stainless Steel at Low Temperatures Using the Slurry Process

Triani, Rafael Magalhães; Gomes, Lucas Fuscaldi De Assis; Aureliano, Ricardo Junior Tadeu; Neto, Amadeu Lombardi; Totten, George E.; Casteletti, Luíz Carlos

doi:10.1007/s11665-020-04748-3

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…When the studies in the literature were examined, Triani et al, in order to produce iron aluminite platings on stainless-steel substrates, obtained FeAl layers on the surface by performing the aluminizing process through exposing the stainless-steel substrates to thermochemical process in a slurry consisting of polyvinyl butyral, ethyl alcohol, Al, AlCl3, and Al2O3 for 2, 4, 6 and 8 hours at 500-650°C. By the result of the study, it was specified that the homogenous FeAl layer of excellent ductility had formed by the increase of temperature and processing time and that this layer had significantly improved the oxidation resistance of the alloy (Triani et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Corrosion Behavior of Sinter-Aluminized P/M Steels

Turgut¹

2022

Journal of Materials and Mechatronics: A

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Bu çalışmada, Distaloy SA tozlarından toz metalurjisi (P/M) yöntemiyle üretilen çeliklerin farklı soğuk presleme basıncı ve sinterleme ortamının mikroyapı, mikrosertlik ve korozyon davranışlarına etkisi incelenmiştir. P/M numuneler; 150 MPa ve 200 MPa olmak üzere iki farklı soğuk presleme basıncıyla presleme işlemi sonrası; alüminyum ile argon olmak üzere iki farklı sinterleme ortamında 1000 °C'de 5 saat sinterleme işlemine tabi tutulmuştur. Sinter-alüminyumlanmış ve sadece sinterlenmiş örneklerin yoğunluk ve yüzey pürüzlülükleri ölçülmüş olup yoğunluklarının soğuk presleme basıncının artmasıyla arttığı yüzey pürüzlülüğünün ise azaldığı belirlenmiştir. P/M numunelerin mikroyapısal özelliklerinin belirleme işlemi X- ışını kırınımı difraksiyonu (XRD), taramalı elektron mikroskobu (SEM) ve enerji dağılımlı X-ışını spektroskopisi (EDS) cihazları kullanılarak gerçekleştirilmiştir. Korozyon deneyleri elektrokimyasal olarak %3,5 NaCl çözeltisinde gerçekleştirilmiştir. Sinter-alüminyumlanmış numunelerin yüzeyinde oluşan FexAly fazlarına bağlı olarak argon ortamında sinterlenmiş numunelere göre daha yüksek korozyon direnci gösterdiği tespit edilmiştir. Dolayısıyla sinter-alüminyumlama işlemi P/M malzemelerin korozitif ortamlardaki kullanımları için umut vadetmektedir.

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Section: Introductionmentioning

confidence: 99%

Characteristics and Corrosion Behavior of Sinter-Aluminized P/M Steels

Turgut¹

2022

Journal of Materials and Mechatronics: A

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“…Among diverse approaches to improve the hot corrosion resistance of these materials, developing a protective coating is the most beneficial one [7,8]. To this aim, various surface coating techniques including chemical vapor deposition (CVD) [9,10], plasma spraying [11,12], slurry deposition [10,13], and hot-dipping [10,14] have recently been employed. Amongst these methods, the pack cementation process, which is a self-generated CVD process, is the most simple and economical one [15,16].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and topographical characterization of the pack cemented aluminide coating applied on Inconel-600

Mahini¹,

Asl²,

Rabizadeh³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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In this research, the pack cementation method was employed to apply a uniform aluminide coating on a substrate of nickel-based superalloy. The obtained intermetallic coating was synthesized using a pack containing 18Al–80Al2O3–2NH4Cl (wt.%) as the main deposition source, an inert filler, and an activator, respectively. The surface morphology and topography, cross-sectional microstructure, the elemental and phase composition, microhardness of the synthesized aluminide coating were studied using atomic force microscopy (AFM), optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD), and Vickers microhardness indenter as the characterization techniques. According to the 3D topography results, the average surface roughness of the Inconel-600 substrate was about 2.446 ± 0.239 nm compared to 43.558 ± 3.876 nm measured for the produced aluminide coating. Additionally, the synthesized coating consisted of NiAl and Ni2Al3 as major phases considering the XRD spectrum. It is also observed that the deposited aluminide coating had a three-layer structure including an outer layer, an inner layer, and a diffusion zone. The Vickers microhardness measurements indicated a significant increase in the microhardness of the substrate (from 185.6 ± 15.8 Hv to 1130.4 ± 42.5 Hv) after applying the aluminide coating. Moreover, the microstructural variations across the deposited aluminide coating led to different microhardness values obtained for each layer. The highest microhardness was observed in the coating diffusion zone, whereas the lowest value belonged to the outer layer.

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“…[1][2][3][4][5][6][7]. Основными направлениями повышения защитных свойств алюминидных покрытий являются следующие: легирование элементами, обеспечивающими стабильность β-фазы NiAl или FeAl, упорядоченной по типу В2; формирование диффузионного барьера на границе «сплав-покрытие», препятствующего взаимодействию покрытияIssue 6, 2022 http://dream-journal.org ISSN 2410-9908 28 Pugacheva N. B. and Polyakov P. A.…”

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The effect of boron on the protective properties of aluminide coatings

Пугачева¹,

Polyakov²

2022

DREAM

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The effect of the formation, microstructure, phase composition, and protective properties of diffusion aluminide coatings alloyed with boron on the EI69 heat-resistant steel and the EI929 nickel alloy is studied. In the course of saturation, boron easily diffuses over the interstices of the B2 crystal lattice of aluminides, thus forming interstitial solid solutions. In this case, the Al content in the coating decreases, thereby implementing the possibility of increasing the plasticity of the coating while maintaining high protective properties. By binding refractory corrosive elements (Mo, W, Nb, etc.) into corrosion-resistant borides, boron increases the overall resistance of the coating in molten Na2SO4 and NaCl salts at 700 °C by an order of magnitude and improves the resistance of the surface to erosion wear. This makes it possible to recommend Al-Si-B coatings to be used for protecting the surface of the turbine blades of supercharging turbochargers and diesel exhaust valves.

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Production of Aluminide Layers on AISI 304 Stainless Steel at Low Temperatures Using the Slurry Process

Cited by 8 publications

References 23 publications

Characteristics and Corrosion Behavior of Sinter-Aluminized P/M Steels

Characteristics and Corrosion Behavior of Sinter-Aluminized P/M Steels

Microstructural and topographical characterization of the pack cemented aluminide coating applied on Inconel-600

The effect of boron on the protective properties of aluminide coatings

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