Kinetic studies of Cr and Al deposition using CVD-FBR on different metallic substrates

Pérez, F.J.; Hierro, María Pilar Queralt del; Pedraza, F.; Gómez, C.; Carpintero, Mercedes; Trilleros, J.A.

doi:10.1016/s0257-8972(99)00305-9

Cited by 40 publications

(16 citation statements)

References 11 publications

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“…CVD and pack cementation are frequently used. Therefore, the chemical vapour deposition in fluidized bed reactor (CVD-FBR) is an important alternative for the deposition of Al coating on ferritic steels, because diffusion coatings can be obtained at relatively low temperatures (T \ 700°C) and short time [27][28][29][30][31][32][33]. These conditions allow the conservation of microstructure and mechanical properties of these types of steels.…”

Section: Introductionmentioning

confidence: 99%

Study of Oxyhydroxides Formation on P91 Ferritic Steel and CVD-FBR Coated by Al in Contact with Ar + 40% H2O at 650 °C by TG-Mass Spectrometry

2010

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The oxidation behaviour of P91 steel with and without Al-CVD-FBR coating was investigated by means of mass spectrometry and TG measurements. All samples were oxidized at 650°C for 190 h in an atmosphere of Ar ? 40%H 2 O. TG-MS experiments were conducted in a closed steam loop in order to obtain information about the oxyhydroxides formation as reaction between coatings and steam. During the oxidation of Al-CVD-FBR/P91 sample were detected volatile species as, FeO(g), Al 2 O 2 (g) around 25 h of test. AlOOH(g) and FeOOH(g) species around 100 h. FeOOH(g), Fe(OH) 3 (g) species around 125 h. FeOOH(g), Fe 2 O 3-H 2 O(g) species around 150 h. CrO 2 (g), volatile species around 175 h. Finally, Al(OH) 2 (g), Al(OH) 3 (g), Fe(OH) 3 (g) volatile species around 190 h. From those results the role of the coating element could be established and optimized for the coating durability. The morphology/composition and structure of oxidized samples were also studied using the SEM-back scattered electron images/EDS and XRD techniques.

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Section: Introductionmentioning

confidence: 99%

Study of Oxyhydroxides Formation on P91 Ferritic Steel and CVD-FBR Coated by Al in Contact with Ar + 40% H2O at 650 °C by TG-Mass Spectrometry

2010

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“…Therefore, the CVD-FBR is an important alternative for the deposition of Al coating on ferritic steels, because it is possible to deposit Al coatings at low temperatures (T! 700 8C) and short time [8][9][10][11][12]. These conditions allow the conservation of microstructure and mechanical properties of these types of steels.…”

Section: Introductionmentioning

confidence: 99%

Iron aluminide coatings on ferritic steels by CVD-FBR technology

et al. 2006

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“…6 ders are rare and their laboratory scale production is complicated. Efforts have been made to develop a low temperature FBCVD process for the formation of protective coatings on steel grades by a rather complicated process using a HCl activator gas [12,13] and aluminisation of Ni by a cost effective and easier-to-handle HCI activator [14]. In the present paper, aluminisation of Ni, Inconel 738, SS304 and ARMCO Fe by using the low temperature FBCVD process and HCI activator is studied.…”

Section: Introductionmentioning

confidence: 99%

Formation of Aluminide Coatings by a Low Temperature FBCVD Process

Christoglou¹,

Bulancea²,

Angelopoulos³

2004

steel research international

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The formation of aluminide coatings on Ni, Inconel 738, NiCr23Fe, SS304 and ARMCO Fe by a Fluidised Bed Chemical Vapour Deposition (FBCVD) process at low temperatures (550-650°C) was studied. Aluminium powder and a HCI activator were used to form precursor halide vapours of AI. This led to the aluminide coating formation on the substrate's surface. The examination of the treated samples by means of optical microscopy and SEM/EDX indicated the deposition of dense and homogeneous coatings over the entire surface even for small treatment times. Coating thickness growth and coating morphology were evaluated for various treatment times and temperatures. The low temperature process has advantages compared to the high temperature process since the mechanical properties of the treated parts are not affected, although the coating thicknesses achieved are smaller.

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Kinetic studies of Cr and Al deposition using CVD-FBR on different metallic substrates

Cited by 40 publications

References 11 publications

Study of Oxyhydroxides Formation on P91 Ferritic Steel and CVD-FBR Coated by Al in Contact with Ar + 40% H2O at 650 °C by TG-Mass Spectrometry

Study of Oxyhydroxides Formation on P91 Ferritic Steel and CVD-FBR Coated by Al in Contact with Ar + 40% H2O at 650 °C by TG-Mass Spectrometry

Iron aluminide coatings on ferritic steels by CVD-FBR technology

Formation of Aluminide Coatings by a Low Temperature FBCVD Process

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