Journal ArticleDOI
Influence of bias variation on residual stress and texture in TiAlN PVD coatings
M. Ahlgren,H. Blomqvist +1 more
TLDR
In this article, the substrate bias was used as an important parameter to affect the compressive stress and the texture in TiAlN PVD coatings on WC/Co cutting inserts as analyzed by X-ray diffraction.Abstract:
It is recognized that the quality and performance of PVD coatings on tungsten carbide based cutting tools are strongly affected by the level of residual stress as it may cause the coatings to delaminate from the substrate and affect the tool life. Here we report on the substrate bias as an important parameter to affect the compressive stress and the texture in TiAlN PVD coatings on WC/Co cutting inserts as analyzed by X-ray diffraction. Approximately 3 μm TiAlN coatings were deposited by arc evaporation with constant process parameters except for the negative substrate bias, which was varied between 40, 70, 100, 140 and 200 V. The residual stress was analyzed using X-ray diffraction and the sin 2 ψ method was used to evaluate the data. The compressive stress increased with increasing bias from − 1.7 GPa for the coating deposited at 40 V to about − 5 GPa for the 70–200 V coatings. As seen in SEM-images, the coatings prepared at higher bias (140 and 200 V) showed a glassy-like type of structure, with {111} texture and with a lattice parameter close to TiN. For the 40 V coating, a columnar type of structure with pronounced {200} texture was observed. Nano-indentation measurements show an increase in hardness by 15% in the bias range studied. Cutting tests show a correlation between the increase of the substrate bias and the edge line coating delamination, and also give an indication of a critical residual stress level for these coatings.read more
Citations
More filters
Journal ArticleDOI
High-performance coatings for cutting tools
TL;DR: In this paper, a historical review of the development of CVD and PVD processes shows a continuous improvement of successful coating materials through adjustments of the chemical composition and the coating architecture.
Journal ArticleDOI
Multilayer (TiN, TiAlN) ceramic coatings for nuclear fuel cladding
TL;DR: In this article, multilayer coatings were applied to ZIRLO® coupon substrates by cathodic arc physical vapor deposition (CA-PVD) to develop accident-tolerant fuel (ATF) that can delay the deleterious consequences of loss-of-coolant-accidents (LOCA).
Journal ArticleDOI
Electronic mechanism for toughness enhancement in Ti x M 1 − x N ( M = Mo and W)
TL;DR: In this article, the authors used ab initio density-functional theory calculations to investigate the mechanical properties of wear-resistant coatings and found that hardness is one of the most important properties.
PatentDOI
Ceramic coating for corrosion resistance of nuclear fuel cladding
TL;DR: In this article, a ternary monolithic coating or multiple layers of one or more layers of TiAlN, ZrN, CrN, NbN, TiN, TaN, Si3N4, and/or HfN are presented.
Journal ArticleDOI
Modified TiAlN coatings prepared by d.c. pulsed magnetron sputtering
TL;DR: In this article, the pulsed magnetron sputter technique was used to improve the hardness and wear properties of hard and wear resistant tool coatings like TiN or TiAlN. The application potential of pulsed sputtered TiN coatings is demonstrated by turning test results of coated cemented carbide cutting inserts.
References
More filters
Book
Residual Stress: Measurement by Diffraction and Interpretation
Ismail C. Noyan,J. B. Cohen +1 more
TL;DR: In this paper, the authors proposed a method to measure residual stress from X-ray diffraction data. But, their method is not suitable for the analysis of nonlinear elasticity theory.
Journal ArticleDOI
Single layer and multilayer wear resistant coatings of (Ti,Al)N: a review
S PalDey,Seetharama C. Deevi +1 more
TL;DR: In this paper, the status of (Ti,Al)N based coatings obtained by various physical vapor deposition (PVD) techniques and compare their properties is discussed and compared with coatings such as TiN, Ti(C,N) and (TiZr)N.
Journal ArticleDOI
Study of the growth mechanisms of chromium nitride films deposited by vacuum ARC evaporation
C. Gautier,J. Machet +1 more
TL;DR: In this paper, the influence of the main deposition parameters (nitrogen pressure pN2, substrate temperature Ts, substrate bias voltage Vs and argon partial pressure pAr) on the structural and mechanical properties of the coatings has been investigated.
Journal ArticleDOI
Characterisation and performance of partially filtered arc TiAlN coatings
TL;DR: In this paper, the effect of bias voltage on the residual stress in PVD coatings was investigated using a dual source filtered arc evaporation system with a view to determine the effect that bias voltage increased from −50 to −250 V on residual stress, as well as the adhesion and cutting tool performance.
Journal ArticleDOI
Microstructure and mechanical properties of cathodic arc ion-plated (Al, Ti)N coatings
TL;DR: In this article, the residual stress of (Al,Ti)N films was measured by the X-ray diffraction (XRD) 2θ-sin 2 ǫ ψ method, and the changes in composition and microstructure were related to the film strains induced by ion bombardment.
Related Papers (5)
Single layer and multilayer wear resistant coatings of (Ti,Al)N: a review
S PalDey,Seetharama C. Deevi +1 more
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments
Warren C. Oliver,George M. Pharr +1 more