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Study of vanadium carbide interface developed by thermodiffusion and laser cladding for HFCVD diamond deposition.

Grant number: 15/25149-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2016
Effective date (End): June 30, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Evaldo Jose Corat
Grantee:Djoille Denner Damm
Home Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brasil). São José dos Campos , SP, Brazil
Associated research grant:12/15857-1 - Scientific studies and innovation application on CVD diamond, DLC and carbon nanostructures obtained by chemical vapor deposition technique, AP.TEM

Abstract

Surface coatings have been used on steel tools for cold working in order to obtain mechanical properties superior to those obtainable with the alloy steels such as high hardness, high thermal conductivity, low friction coefficient, high mechanical resistance, and low wear rate. The purpose of this work is thin CVD diamond coatings production on steel tools, with the use of an intermediate layer of vanadium carbide (VC). We will study two forms of VC coatings: by reactive Thermodiffusion process (TD or TRD, from the English Thermoreactive Diffusion) and by laser cladding. The TRD process consists in steel surface thermal activation with substrate immersed in a molten salt, at temperatures between 900 ° C and 1050 ° C, allowing the formation, diffusion and metallic vanadium reaction to form stoichiometric or nearly stoichiometric VC compounds. Although it is a relatively simple process, numerous variables can interfere in the vanadium carbide formation, as the adopted thermal cycle, the proportion of the reactants and composition of the powder mixture (flux, reducing and forming), the chemical composition of the steel, the carbon concentration in the salt bath and, the oxygen presence in the system. The VC Laser cladding is a process in which a powder mixture is dispersed on the surface of a substrate and the incidence of the laser beam form a molten layer composed by the substrate and the powder. This process offers advantages over the thermodiffusion as reduced time and low cost. However, it demands high technology. The purpose of this proposal is to obtain through both techniques uniform intermediate layers and sufficient thickness to inhibit migration of the substrate iron atoms to the surface and alleviate the residual stress resulting tool contraction during cooling from the CVD diamond growth temperature. This work aims to obtain CVD diamond thin films with high adhesion, using intermediate VC coatings, suitable for applications in tools for metal cutting and plastic deformation.

Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DAMM, D. D.; CONTIN, A.; CARDOSO, L. D. R.; TRAVA-AIROLDI, V. J.; BARQUETE, D. M.; CORAT, E. J. A novel method to mitigate residual stress in CVD diamond film on steel substrates with a single intermediate layer. SURFACE & COATINGS TECHNOLOGY, v. 357, p. 93-102, JAN 15 2019. Web of Science Citations: 0.
DAMM, D. D.; CONTIN, A.; GOMES, M. C. C. B.; TRAVA-AIROLDI, V. J.; BARQUETE, D. M.; CORAT, E. J. Adherent HFCVD diamond on steels substrates using vanadium carbide intermediate layer. DIAMOND AND RELATED MATERIALS, v. 89, p. 218-226, OCT 2018. Web of Science Citations: 0.
DAMM, DJOILLE DENNER; CONTIN, ANDRE; BARBIERI, FERNANDO CRUZ; TRAVA-AIROLDI, VLADIMIR JESUS; BARQUETE, DANILO MACIEL; CORAT, EVALDO JOSE. Interlayers Applied to CVD Diamond Deposition on Steel Substrate: A Review. COATINGS, v. 7, n. 9 SEP 2017. Web of Science Citations: 11.
Synthesis of Vanadium Interface for HFCVD Diamond Deposition on Steel Surface. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, n. ahead, p. -, 2017.
DAMM, DJOILLE DENNER; CONTIN, ANDRE; TRAVA-AIROLDI, VLADIMIR JESUS; DE VASCONCELOS, GETULIO; BARQUETE, DANILO MACIEL; CORAT, EVALDO J. Synthesis of Vanadium Interface for HFCVD Diamond Deposition on Steel Surface. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 20, n. 2, p. 248-253, 2017. Web of Science Citations: 3.
DJOILLE DENNER DAMM; ANDRE CONTIN; VLADIMIR JESUS TRAVA-AIROLDI; GETÚLIO DE VASCONCELOS; DANILO MACIEL BARQUETE; EVALDO J. CORAT. Synthesis of Vanadium Interface for HFCVD Diamond Deposition on Steel Surface. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 20, p. -, 2017.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.