Industrial applications of PACVD hard coatings

Mitterer, Christian; Holler, F.; Reitberger, D; Badisch, E.; Stoiber, Michael; Lugmair, C.; Nöbauer, R.; Müller, Th.; Kullmer, R.

doi:10.1016/s0257-8972(02)00685-0

Cited by 94 publications

(43 citation statements)

References 21 publications

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“…), extensive research has been conducted in order to investigate the mechanical response of these coated systems. Within this context, existing literature concentrates on the influence of either chemical nature or layer-architecture of the film on hardness, scratch resistance, friction coefficient, as well as wear and impact behavior [3,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Yang

Marro

Trifonov

et al. 2015

Surface and Coatings Technology

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Contact loading is a common service condition for coated hardmetal tools and components. Substrate grinding represents a key step within the manufacturing chain of these coated systems. Within this context, the influence of surface integrity changes caused by abrasive grinding of the hardmetal substrate, prior to coating, is evaluated with respect to contact damage resistance. Three different substrate surface finish conditions are studied: ground (G), mirror-like polished (P) and ground plus heat-treated (GTT). Tests are conducted by means of spherical indentation under increasing monotonic load and the contact damage resistance is assessed. Substrate grinding enhances resistance against both crack nucleation at the coating surface and subsequent propagation into the hardmetal substrate. Hence, crack emergence and damage evolution is effectively delayed for the coated G condition, as compared to the reference P one. The observed system response is discussed on the basis of the beneficial effects associated with compressive residual stresses remnant at the subsurface level after grinding, ion-etching, and coating. The influence of the stress state is further corroborated by a lower resistance against damage for the coated GTT specimens. Finally, it is proposed and preliminary validated that substrate grinding also enhances damage tolerance of the coated system when exposed to contact loads. M.P. Johansson-Jõesaar and L. LlanesDear Professor Matthews, Please find attached electronic files corresponding to our contribution on contact damage resistance of TiN-coated hardmetals: beneficial effects associated with substrate grinding, which we (all authors do agree to the submission of the manuscript) offer for publication in Surface and Coatings Technology.I hope it is found satisfactory. (Procedia CIRP, Volume 13, 2014, Pages 257-263).(Authors) R1 is right about connection between results published in our contribution to the 2nd CIRP Conference on Surface Integrity (reference [27] in the submitted manuscript) and those presented in this paper. However, the two papers are distinctly different and cover completely different research topics and contain different data. The former focuses on "ground hardmetals" and "flexural strength/fractography", whereas the current one deals with "coated hardmetals" and "contact damage". Hence, we find R1's comment regarding "similar results" inappropriate. (Authors) Co binder effects on residual stresses are not neglected, and our writing may be blamed for such misunderstanding. Residual stresses induced by grinding are "macrostresses" evaluated in the WC phase and assumed to be representative of the whole WC-Co composite. They are different from the "microstresses" (different for each individual phase) that arise due to the difference in thermal expansion between the binder and the carbide as the material cools from liquid-or solid-phase sintering. In cemented carbides with WC as the carbide, the WC is taken as a reliable reference phase because it remains stoichiometric...

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Section: Introductionmentioning

confidence: 99%

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Yang

Marro

Trifonov

et al. 2015

Surface and Coatings Technology

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“…Electrical resistivity values decrease with the increase in the hardness values, reaching a maximum value of 5.77 × 10 6 Ω-cm for the SC coating; therefore the flow of nitrogen is an important variable to consider in deposition processes, depending on the application required. Growing conditions for the SC coating would favor its application in the diffusion barriers in integrated circuits 5 , while the SA coating conditions have greater application in the metalworking industry, where high-speed steel parts are used for cutting [9][10][11] . Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of nitrogen in TiAlNO coatings fabricated by co-sputtering

L¹,

J²,

N³

et al. 2013

IOP Conf. Ser.: Mater. Sci. Eng.

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Nanocharacterization of titanium nitride thin films obtained by reactive magnetron sputtering V V Merie, M S Pustan, C Bîrleanu et al. Abstract. TiAlNO coatings were obtained on corning glass by means of the co-sputtering technique. Two series were fabricated. In the first one the argon flux was maintained at 12 sccm, while the nitrogen flux was varied in 3, 6 and 9 sccm; in the second one the argon flux was 15 sccm and the nitrogen flux was varied in 2, 3, 4, 5 and 6 sccm, which produced a working pressure variation. For co-sputtering in the first series, three targets were occupied: titanium, alumina and aluminium; meanwhile in the second series, two targets were used: titanium monoxide and aluminium plus an amount of titanium, specifically, 3.5 gr in the aluminium target, occupying 40% of the total effective area of the target. Structural, mechanical and electrical properties were obtained through X-ray diffraction, the Vickers microhardness test and resistivity probes, respectively. For first series, X-ray diffraction detected titanium nitride (TiN) in the crystalline phase; for the second series, aluminium nitride and titanium oxide (TiO) 3.38 . The difference in the crystalline structure obtained for the series explains the microhardness values; in the first series a maximum value of 20.4 GPa at 2 sccm of nitrogen was obtained, whereas in the second series the maximum value obtained was 8 GPa. As one can observe, the increase in nitrogen flux is not an advantage to hardness, but in electrical resistivity it has a positive effect. The results suggest that TiAlNO is versatile material that could be used for both mechanical and electronic applications; however, it is important to control fabrication conditions.

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“…It is well-established that successful functionality of a hard coating system depends not only on composition, microstructure and architecture of the layer itself [49][50][51][52][53], but also on the surface integrity of the supporting substrate as well as on the interface nature and strength. Within this context, existing literature concentrates on the influence of the former aspect.…”

Section: Surface Integrity Issues On Coated Cemented Carbidesmentioning

confidence: 99%

Grinding effects on surface integrity, flexural strength and contact damage resistance of coated hardmetals

Yang¹

2016

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ADVERTIMENT. La consulta d'aquesta tesi queda condicionada a l'acceptació de les següents condicions d'ús: La difusió d'aquesta tesi per mitjà del servei TDX (www.tesisenxarxa.net) ha estat autoritzada pels titulars dels drets de propietat intel·lectual únicament per a usos privats emmarcats en activitats d'investigació i docència. No s'autoritza la seva reproducció amb finalitats de lucre ni la seva difusió i posada a disposició des d'un lloc aliè al servei TDX. No s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant al resum de presentació de la tesi com als seus continguts. En la utilització o cita de parts de la tesi és obligat indicar el nom de la persona autora.ADVERTENCIA. La consulta de esta tesis queda condicionada a la aceptación de las siguientes condiciones de uso: La difusión de esta tesis por medio del servicio TDR (www.tesisenred.net) ha sido autorizada por los titulares de los derechos de propiedad intelectual únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con finalidades de lucro ni su difusión y puesta a disposición desde un sitio ajeno al servicio TDR. No se autoriza la presentación de su contenido en una ventana o marco ajeno a TDR (framing). Esta reserva de derechos afecta tanto al resumen de presentación de la tesis como a sus contenidos. En la utilización o cita de partes de la tesis es obligado indicar el nombre de la persona autora. WARNING.On having consulted this thesis you're accepting the following use conditions: Spreading this thesis by the TDX (www.tesisenxarxa.net) service has been authorized by the titular of the intellectual property rights only for private uses placed in investigation and teaching activities. Reproduction with lucrative aims is not authorized neither its spreading and availability from a site foreign to the TDX service. Introducing its content in a window or frame foreign to the TDX service is not authorized (framing). This rights affect to the presentation summary of the thesis as well as to its contents. In the using or citation of parts of the thesis it's obliged to indicate the name of the author Grinding effects on surface integrity, flexural strength and contact damage resistance of coated hardmetals AbstractThe tribological and mechanical behavior of coated tools depends not only on intrinsic properties of the deposited film but also on substrate surface and subsurface properties -such as topography and residual stress state -as well as on interface adhesion strength. It is particularly true in the case of coated tools based on WC-Co cemented carbides (backbone materials of the tool manufacturing industry, and simply referred to as hardmetals in practice) as substrates.Manufacturing of hardmetals often involves grinding, and in the case of cutting tools also edge preparation, etching and coating. The quality of the shaped components is influenced by how the surface integrity evolves through the different process...

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Industrial applications of PACVD hard coatings

Cited by 94 publications

References 21 publications

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Influence of nitrogen in TiAlNO coatings fabricated by co-sputtering

Grinding effects on surface integrity, flexural strength and contact damage resistance of coated hardmetals

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