Deposition of Cr, Al coatings on Ni by means of a PB and FB CVD process

Christoglou, Ch.; Angelopoulos, G.N.

doi:10.1051/jp4:20013141

Cited by 4 publications

(1 citation statement)

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“…So, SI =Tt(R +r) (R--r) /sinO=~r(R2--r2) /sinO (10) Similarly, the area of the trapezoidal conic section $2 can be given as follows: $2 = (R2 +rz )L2 18) is an analytic one to determine the ideal maximum o{ gap size Hm,~, and as shown in the equation, Hm~ relates to the dead zone angle 0 o{ clad extrusion in the outlet die orifice, the diameter R of clad composite wire and the diameter r of brittle core. Here, K is defined as the speed influence factor and it's a constant, when K equal to 1 the gap size is the optimize.…”

Section: Estimation Equation For Maximum Of Optimalmentioning

confidence: 99%

Optimization analysis on gap size of molding for Pb-GF composite wire

Fang

Sun

Geng

et al. 2005

J Cent. South Univ. Technol.

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Under the condition of equal flow, the maximum and minimum theoretical values of gap size were studied and an estimation equation was established for the clad extrusion of the brittle core cladded by plastic metal materials. The results show that the gap size is a key parameter for the continuous clad extrusion and the molding speed. Its maximum value (Hm~x) is 0.24 mm and the minimum one (Hm~n) is 0. 12 mm. At a gap size of 0. 18 ram, the maximum of metal extrusion per unit of time and the optimal coating speed can be obtained.

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Section: Estimation Equation For Maximum Of Optimalmentioning

confidence: 99%

Optimization analysis on gap size of molding for Pb-GF composite wire

Fang

Sun

Geng

et al. 2005

J Cent. South Univ. Technol.

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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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