Comparison of (Ti,Al)N and (Ti,Al)N/γ-Al2O3 coatings regarding tribological behavior and machining performance

Bobzin, Kirsten; Bagcivan, Nazlim; Ewering, M.; Brugnara, Ricardo H.; Bastürk, Serhan

doi:10.1016/j.surfcoat.2014.08.070

Cited by 16 publications

(4 citation statements)

References 18 publications

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“…Eine Möglichkeit zur Erhöhung der Standzeit der Presswerkzeuge stellt der Einsatz von Beschichtungen dar. B. Chromaluminiumnitrid (Cr,Al)N und Titanaluminiumnitrid (Ti,Al)N, die bereits grundlegend untersucht und industriell auf Werkzeugen im Bereich der Zerspanung und Umformung eingesetzt wurden [16][17][18]. magnetron sputtering, MS) Verfahren etabliert.…”

Section: Discussionunclassified

“…B. Chromnitrid CrN, Aluminiumnitrid AlN und Titannitrid TiN [10], sowie ternäre chrom-und titanbasierte Beschichtungen, z. B. Chromaluminiumnitrid (Cr,Al)N und Titanaluminiumnitrid (Ti,Al)N, die bereits grundlegend untersucht und industriell auf Werkzeugen im Bereich der Zerspanung und Umformung eingesetzt wurden [16][17][18]. Im Rahmen dieses Beitrags wurden aufgrund der o.g.…”

Section: Discussionunclassified

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PVD‐Schutzschichten für Werkzeuge des Präzisionsblankpressens

Bobzin¹,

Brögelmann²,

Kruppe³

et al. 2019

Vak Forsch Prax

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Summary PVD protective coatings for precision molding tools Precision glass molding (PGM) is a replicative hot forming process for the production of complex optical components, such as aspherical lenses for digital and mobile phone cameras or optical elements for laser systems. The efficiency and thus also the profitability of the PGM depend on the unit price per pressed component, which correlates primarily with the service lifetime of the pressing tools. To increase tool lifetime, the tool surfaces are coated with protective coatings based on precious metals or carbon using physical vapour deposition (PVD). The PVD coating technology enables the deposition of thin coatings, which also follow more complex surface geometries and achieve a high surface quality. PVD coatings are also commonly used to protect tools from wear and corrosion. This paper presents two chromium‐based nitride hard coatings produced by an industrial PVD unit and investigated for their applicability for PGM. Two different coating architectures were implemented, on the one hand a single coating chromium aluminium nitride (Cr,Al)N coating and on the other hand a nanolaminar CrN/AlN coating with alternating layers of chromium nitride and aluminium nitride. The latter is a coating consisting of hundreds of nano‐layers, only a few nanometers thick. Both coatings, (Cr,Al)N and CrN/AlN, each have a thickness of s ∼ 300 nm in order to follow the tool contour as closely as possible. The properties of the coating systems, which are of particular relevance for PGM, are considered. These include on the one hand the adhesion of glass, the roughness and topography of the surface and the adhesion between the coating and the tool material. In addition, the barrier effect of the coatings against diffusion of oxygen was investigated. In order to reproduce the thermal boundary conditions of the PGM, thermocyclic aging tests are performed and their influence on the different properties is described.

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Section: Discussionunclassified

PVD‐Schutzschichten für Werkzeuge des Präzisionsblankpressens

Bobzin¹,

Brögelmann²,

Kruppe³

et al. 2019

Vak Forsch Prax

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“…However, Al2O3 deposited by PVD has been a subject of various research groups, such as [6][7][8] due to its chemical inertness, wear resistance or high hardness at high temperature for example. In research at the Surface Engineering Institute (IOT) RWTH Aachen University in wear and corrosion resistant coatings for aluminum die casting in [9,10], an Al2O3 top layer deposited by arc PVD showed a lower wettability through the aluminum melt.…”

Section: Introductionmentioning

confidence: 99%

Temperature Measurement on Tool Surfaces by Wear Resistant PVD Sensor Coatings

Bobzin

Brögelmann

Kruppe

et al. 2020

DDF

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In manufacturing technology, sensors are important elements for monitoring process parameters and for recording data in the Industrie 4.0. Thin sensors manufactured by means of physical vapor deposition (PVD) offer a way to combine wear and corrosion protection on the one hand and the integration of a temperature sensor function on the other hand. For the analysis of the performance of PVD sensor coatings based on the thermoelectric effect, no standardized methods and procedures are state of the art. In this paper a measuring setup is presented, which allows reference measurements using a calibrated thermocouple and a thermographic camera besides the potential difference measurement of the sensor coating. Two measuring modes, which allow a continuous and a discontinuous measurement, are presented. The measuring methodology was evaluated using the PVD sensor coating Al2O3+Ni+NiCr+Al2O3. This multilayer sensor coating was deposited using an industrial coating unit and was tested with regard to the sensor properties. The deposition technology used for the sensor coating results in an interface without defects between the two sensor layers with a smooth transition. This provides a suitable electrical contact and a promising compound adhesion. The results show a suitable and detailed measurement of temperature and potential differences by means of calibrated measurement methods and the sensor coating. The measured results are reproducible and show a linear relationship between the potential difference and the surface temperature.

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“…Uno de los principales problemas presentes en la industria mundial, sea automotriz, metalmecánica e incluso la petrolera, es el desgaste de sus herramientas de trabajo lo que conlleva a perdidas en calidad, cantidad de producción y sobrecosto en los procesos de manufactura. Con el fin de mejorar las propiedades mecánicas tales como dureza, resistencia al desgaste (Bobzin et al, 2014), aumento de la resistencia a la corrosión y diminución del coeficiente de fricción, se han realizado procesos llamados recubrimientos duros (Capote Rodriguez et al, 2015), que permiten que estas piezas puedan ser utilizadas en aplicaciones específicas como en las industrias metalmecánica, papelera, de transformación de materiales poliméricos y alimentaria, entre otras (Nieto et al, 2010). Los recubrimientos se han venido utilizando comercialmente para prolongar la vida útil de elementos industriales como las herramientas de corte y componentes de máquinas, manteniendo una gran acogida y utilización de forma industrial (Davies et al, 2007).…”

Section: Introductionunclassified

Evaluación del Desempeño de Buriles con Recubrimiento Monocapas de Nitruro de Hafnio en el Proceso de Mecanizado

2016

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Recubrimientos monocapa de nitruro de hafnio fueron depositados en buriles de acero rápido, mediante técnica de deposición física en fase vapor mediante pulverización con magnetrón (magnetrón sputtering). Se usó buriles sin recubrir como sistemas de referencias, en el mecanizado por arranque de viruta del acero AISI1020, midiendo las temperaturas generadas. Se caracterizó la resistencia al desgaste de las herramientas evaluándolas mediante microscopia electrónica de barrido, y las superficies obtenidas en el acero mecanizado mediante un rugosímetro. Se evidenció que el uso de recubrimientos monocapa de nitruro de hafnio en buriles de acero rápido disminuye el desgaste adhesivo de la herramienta y la transferencia de energía generada durante el proceso de corte. Además, el recubrimiento ofrece ventajas en su aplicación en el corte por arranque de viruta de metales ferrosos, al aumentar la vida útil de la herramienta, mejorar la calidad del producto, y disminuir los tiempos y costos del proceso.

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Comparison of (Ti,Al)N and (Ti,Al)N/γ-Al2O3 coatings regarding tribological behavior and machining performance

Cited by 16 publications

References 18 publications

PVD‐Schutzschichten für Werkzeuge des Präzisionsblankpressens

PVD‐Schutzschichten für Werkzeuge des Präzisionsblankpressens

Temperature Measurement on Tool Surfaces by Wear Resistant PVD Sensor Coatings

Evaluación del Desempeño de Buriles con Recubrimiento Monocapas de Nitruro de Hafnio en el Proceso de Mecanizado

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