Low stress TiB2 coatings with improved tribological properties

Berger, M.; Karlsson, Lennart; Larsson, Mats; Hogmark, Sture

doi:10.1016/s0040-6090(01)01481-x

Cited by 109 publications

(66 citation statements)

References 32 publications

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“…At such values of the modulus of elasticity E s and E 0 the modulus of elasticity E f of studied amorphous -nanocrystalline Ti-B films was 590 GPa. These values are very similar to the available references data obtained using the method of nanoindentation for coatings [56] and massive titanium boride [57]. It should be noted that the method of nanoindentation is used for experimental determination of the Young modulus using a film normal and the present method is used to determine the Young modulus in the film plane.…”

Section: E T E T T T T E E E T E T Tsupporting

confidence: 85%

Multifunctional Ceramic Nanostructured Coatings

Pugachov¹

2010

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S)AFRL-AFOSR-UK-TR-2010-0006 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis report results from a contract tasking National Technical University 'Kharkov Polytechnical Institute' as follows: The project is devoted to creating the new class of high-efficiency wear-resistant ion-plasma coatings based on transition metal borides for application under extreme conditions. The main idea of the project: providing the necessary properties of the materials due to controlling the phase composition, structure and stress state during their formation from ion-plasma fluxes. SUBJECT TERMS SummaryThis paper delves into integrated analysis of a structure, substructure, stressed state and some mechanical and physical properties of the films formed by the titanium and tungsten borides and carbides. The analysis was done using the X-ray and electron-optical methods. This information expands our knowledge of the mechanisms that are involved in the formation of condensates using the ion -plasma methods and it is needed for evolving a condensate formation theory using these methods to provide the physical fundamentals for numerous practical applications.In addition, this paper analyzes stability of the structural state and mechanical properties of materials of a new class, i.e. ion-plasma coatings of quasi-binary systems subjected to the influence of factors peculiar for the open space.

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Section: E T E T T T T E E E T E T Tsupporting

confidence: 85%

Multifunctional Ceramic Nanostructured Coatings

Pugachov¹

2010

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“…[82] In the last two decades, TiB 2 coatings have been deposited using UBM exhibiting low intrinsic stress and extremely high hardness (40-77 GPa) (Fig. 12), [see e.g., [83][84][85] which is far beyond its bulk value of 25 GPa. [82] Recently, Mayrhofer et al proposed a model explaining the origin of the high hardness by the formation of a nanocolumnar structure of B-supersaturated TiB 2+x films showing a pronounced (0001) texture.…”

Section: Reviewsmentioning

confidence: 99%

Mechanical Size‐Effects in Miniaturized and Bulk Materials

et al. 2006

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Interfaces and surfaces can impose substantial mechanical size‐effects on materials. The deformation mechanisms become increasingly constrained when microstructural and/or geometrical dimensions decrease. This effect can improve, for example, the creep resistance of a bulk lamellar material, but it may cause failure for a miniaturized material component due to high internal stresses. Several dislocation mechanisms causing size‐dependent flow stresses for (sub)micron‐sized metals and metallic thin films are addressed in this paper and the current understanding of size‐effects in miniaturized and bulk materials is reviewed. The beneficial application of mechanical size‐effects is demonstrated for TiAl alloys and nanostructured hard coatings.

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“…Deposition of TiB 2þx coatings, typically columnar TiB 2 with a B-rich tissue phase, by physical vapor deposition (PVD) has been previously demonstrated by magnetron sputtering from compound targets. [5][6][7][8][9] However, amongst PVD techniques, arc evaporation is more commonly used for synthesis of hard coatings, mainly because of high deposition rate, good adhesion, and a dense morphology. 10 Till date, there is no reproducible synthesis of TiB 26x from arc evaporation and from the reported few attempts on the use of TiB 2 cathodes for thin film synthesis, extensive instability, cracking, and cathode failure.…”

mentioning

confidence: 99%

Vacuum arc plasma generation and thin film deposition from a TiB₂cathode

et al. 2015

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We have studied the utilization of TiB2 cathodes for thin film deposition in a DC vacuum arc system. We present a route for attaining a stable, reproducible, and fully ionized plasma flux of Ti and B by removal of the external magnetic field, which leads to dissipation of the vacuum arc discharge and an increased active surface area of the cathode. Applying a magnetic field resulted in instability and cracking, consistent with the previous reports. Plasma analysis shows average energies of 115 and 26 eV, average ion charge states of 2.1 and 1.1 for Ti and B, respectively, and a plasma ion composition of approximately 50% Ti and 50% B. This is consistent with measured resulting film composition from X-ray photoelectron spectroscopy, suggesting a negligible contribution of neutrals and macroparticles to the film growth. Also, despite the observations of macroparticle generation, the film surface is very smooth. These results are of importance for the utilization of cathodic arc as a method for synthesis of metal borides. (C) 2015 AIP Publishing LLC.

Funding Agencies|European Research Council under the European Community Seventh Framework Program (FP7)/ERC [258509]; Swedish Research Council (VR) [642-2013-8020]; Knut and Alice Wallenberg Foundation; SSF synergy grant FUNCASE

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Low stress TiB2 coatings with improved tribological properties

Cited by 109 publications

References 32 publications

Multifunctional Ceramic Nanostructured Coatings

Multifunctional Ceramic Nanostructured Coatings

Mechanical Size‐Effects in Miniaturized and Bulk Materials

Vacuum arc plasma generation and thin film deposition from a TiB₂cathode

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Low stress TiB2 coatings with improved tribological properties

Cited by 109 publications

References 32 publications

Multifunctional Ceramic Nanostructured Coatings

Multifunctional Ceramic Nanostructured Coatings

Mechanical Size‐Effects in Miniaturized and Bulk Materials

Vacuum arc plasma generation and thin film deposition from a TiB2cathode

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Product

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Vacuum arc plasma generation and thin film deposition from a TiB₂cathode