Improvement of coating adhesion on cemented carbide tools by plasma etching

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Surface treatments are one of the main factors to control adhesion between coating and substrate on a cut- ting 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...

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Principais autores:	Oliveira, Adilson José de, Alves, Salete Martins, Albano, Wendell
Formato:	article
Idioma:	English
Publicado em:	Springer
Assuntos:	Plasma etching Chemical etching Coated tools Coating adhesion
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/31978
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spelling	ri-123456789-319782021-03-28T08:53:30Z Improvement of coating adhesion on cemented carbide tools by plasma etching Oliveira, Adilson José de Alves, Salete Martins Albano, Wendell Plasma etching Chemical etching Coated tools Coating adhesion Surface treatments are one of the main factors to control adhesion between coating and substrate on a cut- ting 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 toolshowed 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 2021-03-23T18:32:39Z 2021-03-23T18:32:39Z 2016-05-04 article 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: 17 out. 2020. http://dx.doi.org/10.1007/s40430-016-0545-3. 1678-5878 1806-3691 https://repositorio.ufrn.br/handle/123456789/31978 10.1007/s40430-016-0545-3 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Springer
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Plasma etching Chemical etching Coated tools Coating adhesion
spellingShingle	Plasma etching Chemical etching Coated tools Coating adhesion Oliveira, Adilson José de Alves, Salete Martins Albano, Wendell Improvement of coating adhesion on cemented carbide tools by plasma etching
description	Surface treatments are one of the main factors to control adhesion between coating and substrate on a cut- ting 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 toolshowed 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
format	article
author	Oliveira, Adilson José de Alves, Salete Martins Albano, Wendell
author_facet	Oliveira, Adilson José de Alves, Salete Martins Albano, Wendell
author_sort	Oliveira, Adilson José de
title	Improvement of coating adhesion on cemented carbide tools by plasma etching
title_short	Improvement of coating adhesion on cemented carbide tools by plasma etching
title_full	Improvement of coating adhesion on cemented carbide tools by plasma etching
title_fullStr	Improvement of coating adhesion on cemented carbide tools by plasma etching
title_full_unstemmed	Improvement of coating adhesion on cemented carbide tools by plasma etching
title_sort	improvement of coating adhesion on cemented carbide tools by plasma etching
publisher	Springer
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/31978
work_keys_str_mv	AT oliveiraadilsonjosede improvementofcoatingadhesiononcementedcarbidetoolsbyplasmaetching AT alvessaletemartins improvementofcoatingadhesiononcementedcarbidetoolsbyplasmaetching AT albanowendell improvementofcoatingadhesiononcementedcarbidetoolsbyplasmaetching
_version_	1773962271171543040

Improvement of coating adhesion on cemented carbide tools by plasma etching

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