Improvement of coating adhesion on cemented carbide tools by plasma etching

Alves, Salete Martins; Albano, Wendell; Oliveira, Adilson José de

Improvement of coating adhesion on cemented carbide tools by plasma etching

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dc.contributor.author	Alves, Salete Martins
dc.contributor.author	Albano, Wendell
dc.contributor.author	Oliveira, Adilson José de
dc.date.accessioned	2020-09-24T13:46:19Z
dc.date.available	2020-09-24T13:46:19Z
dc.date.issued	2016-05-04
dc.description.resumo	Surface treatments are one of the main factors to control adhesion between coating and substrate on a cutting tool. Poor coating adhesion on the substrate accelerates the wear progress and decreases tool lifetime due to the pull-out and release of hard abrasive particles between the tool rake or flank face and the workpiece. Mechanical and chemical substrate treatments are used in order to improve the coating adhesion. This study evaluated and compared the chemical and plasma etching effectiveness in the improvement of substrate-coating adhesion, and consequently, tool life of PVD-coated cemented carbide tools. The plasma etching was performed in plasma reactors in which the cations produced collide with the samples and remove from the surface atoms or molecules modifying the topography. In the chemical etching, acid and alkaline solutions were used to remove tool surface material, changing its initial roughness and chemical composition. After these surface treatments, the samples were PVD coated with (Ti,Al)N. To ascertain the effectiveness of the surface treatment, Rockwell B indentation and machining experiments were performed on treated and untreated tools. Tool topographies were analyzed by atomic force microscopy (AFM) and flank wear lands were evaluated by scanning electronic microscopy (SEM). The plasma-treated tool showed better performance in the indentation and turning tests. Therefore, the chemical etching-treated tool showed the highest roughness, but the coating adhesion was poor due to chemical changes on substrate surface. Furthermore, good anchoring is not influenced only by roughness, it also depends on the substrate surface chemical nature	pt_BR
dc.identifier.citation	ALVES, Salete Martins; ALBANO, Wendell; OLIVEIRA, Adilson José de. Improvement of coating adhesion on cemented carbide tools by plasma etching. Journal of The Brazilian Society of Mechanical Sciences And Engineering, [S.L.], v. 39, n. 3, p. 845-856, 4 maio 2016. Disponível em: https://link.springer.com/article/10.1007/s40430-016-0545-3. Acesso em: 24 ago. 2020. http://dx.doi.org/10.1007/s40430-016-0545-3.	pt_BR
dc.identifier.doi	10.1007/s40430-016-0545-3
dc.identifier.issn	1806-3691
dc.identifier.issn	1678-5878
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/30197
dc.language	en	pt_BR
dc.publisher	Universidade Federal do Rio de Janeiro - UFRJ	pt_BR
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/br/	*
dc.subject	Plasma etching ·	pt_BR
dc.subject	Chemical etching	pt_BR
dc.subject	Coated tools ·	pt_BR
dc.subject	Coating adhesion	pt_BR
dc.title	Improvement of coating adhesion on cemented carbide tools by plasma etching	pt_BR
dc.type	article	pt_BR