Influence of W Addition on Microstructure and Resistance to Brittle Cracking of TiB2 Coatings Deposited by DCMS

Chudzik-Poliszak, Edyta; Cieniek, Łukasz; Moskalewicz, T.; Kowalski, Kazimierz; Kopia, Agnieszka; Smolik, J.

doi:10.3390/ma14164664

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…For this purpose, the specially constructed chamber wall was used with localized two circular magnetrons at an angle of 120 • to each other. In the two separated deposition processes, we used three targets made on TiB 2 (99.50% purity) and pure-W (99.95%purity) and pure-Cr (99.95% purity), as reported in the papers [20][21][22]. The dimensions of the targets were as follows: The diameter d = 100 mm and the thickness g = 7 mm.…”

Section: Preparation Of Samplesmentioning

confidence: 99%

“…The mechanical characteristics of the coatings, such as the fracture toughness, are very important in the process of improvement and better evolution of material solutions for coatings with high tribological effectiveness. Our previous investigation shows that it can be possible to use the Laugier model to assess the fracture toughness of the ceramic coating (TiB 2 ) doped with different concentrations of tungsten (W) [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Fracture Toughness KIc for Selected Magnetron Sputtering Coatings by Using the Laugier Model

et al. 2022

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Nanoindentation is one of the methods that allows for determining the fracture properties of brittle materials. In this article, the authors present the possibility of the fracture toughness coefficient calculation of ceramic-based coatings doped by metal (W, Cr) by using the nanoindentation method with the Berkovich diamond indenter. The mechanical properties of selected coatings, such as hardness and Young’s modulus, were investigated from nanohardness experiments. We analyzed the brittle fracture, which includes changes in hardness (H), Young’s modulus (E), plasticity index H/E and resistance to plastic deformation H3/E2, enabled the concentration of tungsten and chromium. Due to the size of the indentation and the size of the initial cracks, it is necessary to use Scanning Electron Microscopy (SEM) to observe and measure the indentations made and the generated cracks. For evaluation of the fracture toughness in mode I, the Laugier model was chosen experimentally. The fracture toughness analysis showed that doping with concentrations of 10% W and 10% Cr causes an increase in the fracture toughness for KIc = 4.98 for TiBW (10%) and KIc = 6.23 for TiBCr (10%).

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Section: Preparation Of Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Fracture Toughness KIc for Selected Magnetron Sputtering Coatings by Using the Laugier Model

et al. 2022

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Effect of chromium doping on the structure and mechanical properties of anti-wear TiB2 coatings

Cieniek

Chudzik-Poliszak

Moskalewicz

et al. 2023

Archiv.Civ.Mech.Eng

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TiB2-based coatings have been intensively developed due to their physical and mechanical properties, including excellent thermal stability and high hardness with good abrasion and corrosion resistance, which appear to be the most beneficial in industrial application. Previous investigations have shown that doping TiB2 with W, Ni and C can significantly reduce residual stresses and improve adhesion, making these coatings ideal on tools to machining aluminum alloys. The aim of this study was to analyze the effect of an Cr interlayer on the durability (adhesion) of the fabricated Ti1−xCrxB2 (x = 0; 0.03; 0.06; 0.10) films and determine the influence of Cr on their microstructure and mechanical properties. The structural characterization of Ti1−xCrxB2 coatings was carried out using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and atomic force microscopy. To investigate the mechanical properties, nano-scratch and—hardness tests (NST, NHT) were performed, and fracture toughness of the substrate layer systems was determined. The use of an adhesive layer of pure Cr increased the adhesion of the coatings to the substrate. It is shown that the changes in Cr content not only affect the microstructure, mainly by decreasing the crystallite size (column width), but also the texture (preferred film orientation) and phase composition. The addition of chromium also has an effect on the mechanical properties of TiB2 films by reducing their hardness and Young’s modulus and increasing their fracture toughness (KIC).

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Mechanical and tribological properties of Ti1-xZrxB2 coatings deposited by magnetron sputtering on hot work steel

Cieniek,

Kopia,

Kot

et al. 2024

Arch. Civ. Mech. Eng.

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Low fracture toughness is a common problem encountered by many researchers in the application of pure TiB2 coatings. To improve their properties, a convenient and useful method is the use of doping, so this study proposes the deposition of TiB2 enriched with Zr on a steel substrate. The objective of the research was to investigate the impact of Zr addition to TiB2 coatings on both their mechanical and tribological properties. Four coatings with varying compositions (pure TiB2; TiB2 doped with 3, 6, and 10 at.% Zr) were deposited using magnetron sputtering from TiB2 and Zr targets. The coating structures were analyzed by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Nanoindentation, scratch test, and ball-on-disk test were used to determine the mechanical and tribological properties. In most cases, only two factors have a significant impact on the mechanical and tribological properties of the Zr-doped coating. Firstly, a change in the preferred orientation of the coating from (102)(111) to (100) results in increased hardness and wear resistance. Secondly, a reduction in crystallite and column size enhances ductility and fracture toughness by impeding or altering the direction of crack propagation. Based on the study, one can conclude that the optimal Ti1-xZrxB2 properties were obtained for 6 at.% Zr content.

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Influence of W Addition on Microstructure and Resistance to Brittle Cracking of TiB2 Coatings Deposited by DCMS

Cited by 4 publications

References 23 publications

Evaluation of the Fracture Toughness KIc for Selected Magnetron Sputtering Coatings by Using the Laugier Model

Evaluation of the Fracture Toughness KIc for Selected Magnetron Sputtering Coatings by Using the Laugier Model

Effect of chromium doping on the structure and mechanical properties of anti-wear TiB2 coatings

Mechanical and tribological properties of Ti1-xZrxB2 coatings deposited by magnetron sputtering on hot work steel

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