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In this work, the design of an electrical furnace for producing transition metal-based hard coatings using the thermo-reactive deposition and diffusion TRD technique is described. Performance of the system was tested through production of vanadium carbide VC and niobium carbide NbC coatings on steel AISI D2. X-ray diffraction XRD and optical microscopy techniques were used to study phase formation and microstructure, respectively. Hardness was determined by using Knoop microhardness measurements. XRD results showed the presence of VC and NbC, and as MEB results clearly show, the formation of regular thickness coatings. The results obtained allow for assessing that the designed and built furnace fulfills the requirements of the TRD technique for obtaining different types of hard coatings.

Tipo de documento: Artículo - Article

Información adicional: Derechos de autor reservados

Palabras clave: Thermoreactive deposition and diffusion TRD, coatings, VC, NbC





Source: http://www.bdigital.unal.edu.co


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ELECTRICAL FURNACE FOR PRODUCING CARBIDE COATINGS USING THE THERMOREACTIVE DEPOSITION-DIFFUSION TECHNIQUE DISEÑO DE UN HORNO ELÉCTRICO PARA PRODUCIR RECUBRIMIENTOS DE CARBUROS METÁLICOS UTILIZANDO LA TÉCNICA DE DEPOSICIÓN POR DIFUSIÓN TERMORREACTIVA FABIO CASTILLEJO PhD (c) en Ingeniería – Ciencia y tecnología de los materiales, Grupo de Ciencia e Ingeniería de Materiales (CIM), Universidad Santo Tomás de Aquino, Colombia, fabiocastillejo@usantotomas.edu.co DIANA MARULANDA PhD en Ingeniería – Ciencia y tecnología de los materiales, Grupo de Ciencia e Ingeniería de Materiales (CIM), Universidad Santo Tomás de Aquino, Colombia, dmaritzamc@gmail.com.co OLIVO RODRIGUEZ Ingeniero Mecánico, Grupo de Ciencia e Ingeniería de Materiales (CIM), Universidad Santo Tomás de Aquino, Bogotá, Colombia, olivarryyy@gmail.com JHON OLAYA PhD en Ciencia e Ingeniería de Materiales, Departamento de Ingeniería Mecánica y Mecatrónica, Universidad Nacional de Colombia, Sede Bogotá, jjolaya@unal.edu.co Received for review March 28 th, 2011, accepted July 18th, 2011, final version August, 16 th, 2011 ABSTRACT: In this work, the design of an electrical furnace for producing transition metal-based hard coatings using the thermo-reactive deposition and diffusion (TRD) technique is described.
Performance of the system was tested through production of vanadium carbide (VC) and niobium carbide (NbC) coatings on steel AISI D2.
X-ray diffraction (XRD) and optical microscopy techniques were used to study phase formation and microstructure, respectively.
Hardness was determined by using Knoop microhardness measurements.
XRD results showed the presence of VC and NbC, and as MEB results clearly show, the formation of regular thickness coatings.
The results obtained allow for assessing that the designed and built furnace fulfills the requirements of the TRD technique for obtaining different types of hard coatings. KEYWORDS: Thermoreactive deposition and diffusion (TRD), coatin...






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