Adaptive VN/Ag nanocomposite coatings with lubricious behavior from 25 to 1000°C

Aouadi, Samir; Singh, Dhan Pal; Stone, D. S.; Polychronopoulou, Kyriaki; Nahif, F.; Rebholz, Claus; Muratore, Christopher; Voevodin, Andrey A.

doi:10.1016/j.actamat.2010.06.006

Cited by 188 publications

(80 citation statements)

References 20 publications

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“…Similar results were obtained in TaN/Ag and VN/Ag studies [103,107]. According to X-ray diffraction analysis (XRD) data [103], TaN/Ag coatings containing approximately 20 at.% Ag had a nanocomposite structure consisting of cubic Ag grains and the TaN matrix.…”

Section: Coatings With the Adaptive Friction Mechanismsupporting

confidence: 71%

“…By way of example, Al/Au [99], Mo 2 N/Ag [100,101], TiN/Ag [102], NbN/Ag [60,90], TaN/Ag [103], CrN/Ag [104,105], ZrN/Ag [106], VN/Ag [107], and CrAlN/Ag [108] composites were synthesized and investigated. Binary compounds exemplified by nitride±transition metal complexes are known to make up poor antifriction coatings due to a relatively low oxidation temperature and high friction coefficients equaling 0.9 for TaN, 0.35 for Mo 2 N, 0.17 for TiN, 0.16 for CrN, 0.19 for ZrN, 0.8 for VN, 0.89 for NbN, and 0.37 for CrAIN.…”

Section: Coatings With the Adaptive Friction Mechanismmentioning

confidence: 99%

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Adaptive multicomponent nanocomposite coatings in surface engineering

Pogrebnjak¹,

Bagdasaryan²,

Pshyk³

et al. 2017

Phys.-Usp.

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Abstract. This paper reviews experimental research on nanocomposite protective coatings of various chemical compositions and structure. For adaptive multielement and multilayer systems with specific phase composition, structure, substructure, stress state, and high functional properties, formation conditions are considered; the behavior of such systems under extreme operating conditions and in tribological applications is examined; the structural, phase, and chemical composition are discussed as well as the hardness, friction and wear at elevated temperatures; and the adhesive strength of hierarchical protective coatings is analyzed. Finally, the adaptive behavior under different tribological test conditions of multifunctional, multilayer coatings as a function of their properties and structure is examined.

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Section: Coatings With the Adaptive Friction Mechanismsupporting

confidence: 71%

Section: Coatings With the Adaptive Friction Mechanismmentioning

confidence: 99%

Adaptive multicomponent nanocomposite coatings in surface engineering

Pogrebnjak¹,

Bagdasaryan²,

Pshyk³

et al. 2017

Phys.-Usp.

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“…Values of coefficient of friction and wear rate of deposited TaN(Ag-Cu) coatings without and with heat-treatment are consigned in Table 4; the results of all tribological tests for the heat treated samples indicated a better anti-wear effect with increasing Ag-Cu content than the untreated ones. This improvement is linked to a surface enrichment of TaN with silver and copper nanoparticles, which have a solid lubricant effect that is more efficient than in untreated samples, as also explained by various authors [14,15], [34][35][36]. Figure 9 shows the wear tracks of C1 and C3 coatings, which after heat treatment are clearly smoother and shallower than as in the as produced condition (no heat treatment), decreasing removed material volume after tribological evaluation.…”

Section: Microhardness and Wear Evaluationmentioning

confidence: 73%

Mechanical and tribological features of TaN(Ag-Cu) duplex nanocomposite coatings: their response to heat treatment

Echavarría

Meza

2017

Ingeniare. Rev. chil. ing.

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AISI 420 martensitic stainless steel samples and silicon (100) were coated with tantalum nitride doped with copper and silver nanoparticles TaN(Ag-Cu) to improve their hardness and wear resistance. The coatings were deposited by unbalanced DC Magnetron Sputtering technique, using a tantalum target and other silver/copper composite target (50/50%at), confronted each other. The coated samples were subjected to an appropriate heat treatment at 250 ºC for 8 minutes to achieve a controlled diffusion of Ag-Cu nanoparticles to the TaN(Ag-Cu) surface. Due to their mechanical and tribological properties depend, not only on the content of Ag-Cu, but also on the size, shape and density of nanoparticles of Ag-Cu on the surface of the coating. The influence of the Ag-Cu content on the microstructure and mechanical and tribological properties of the composite coating were evaluated before and after the heat treatment was evaluated. In general terms, the microhardness and wear rate increased initially with Ag-Cu content, but then dropped down for contents higher to 0.71% at, exhibiting the lubricating effect of Ag-Cu nanoparticles in the compound before and after heat treatment. The heat treated C3 sample showed a microhardness of 15 GPa, very superior to the hardness of AISI 420 stainless steel, as well as a wear rate six orders of magnitude lower than the steel.Keywords: AISI 420, magnetron sputtering, silver and cooper nanoparticles, tantalum nitride, tribological properties. (100) coated samples. These parameters were studied in this as well. RESUMEN Se recubrieron muestras de acero inoxidable martensítico AISI 420 y de silicio EXPERIMENTAL METHODS TaN(Ag-Cu) coatings developmentTaN(Ag-Cu) coatings were deposited on AISI 420 steel plates (12.5x12.5x2.8 mm 3 ) and single crystalline silicon wafers (100) by unbalanced DC magnetron sputtering, using a tantalum target and an Ag/Cu (50-50%at) composited target, both with 99.9% purity and dimensions of 500x100x6 mm 3 . A rectangular vacuum chamber with dimensions of 500x500x800 mm 3 was used in this work.Silicon substrates were used for spectroscopic and X-ray diffraction measurements to reduce the signal from the alloying elements of steel. AISI 420 stainless steel samples were polished using SiC emery paper with grain sizes between 300 to 1200 and subsequently polished to a mirror finish until obtaining an average roughness of Ra= 0.05mm in alumina aqueous solution. The polished samples were cleaned in an ultrasonic bath with an alcoholacetone solution for 15 minutes and then subjected to argon ionic cleaning into the vaccum chamber during 30 minutes at a pressure of 1.7x10 -1 mbar and using a bias voltage of -500V applied to substrates.The nitriding process was performed into pulsed plasma conformed by Ar = 57 sccm, N 2 = 15 sccm and H 2 =27 sccm; the pressure, bias voltage and temperature of the process were fixed to 5.1x 10 -1 mbar, -600 V and 380 ºC, respectively. This process was performed for 7 hours. The low temperature of plasma nitriding was used to avoid the...

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“…At a wide temperature range, VN/Ag adaptive tribological coatings produced using unbalanced magnetron sputtering exhibited excellent self-lubricating properties [115]. The friction coefficient was found to vary from 0.35 at room temperature to about 0.15-0.20 in the 700-1000 °C range.…”

Section: Adaptive Nitride-based High Temperature Self-lubricating Coamentioning

confidence: 91%

“…Since it is difficult or impossible for a bulk monolithic material to possess all the above mentioned surface properties [112], much attention has been paid to metallic matrix composite coatings which contain solid lubricants prepared by various processes, such as PS coatings by plasma spray [11,113], Ni/hBN composite coating by laser cladding [114], adaptive nitride-based coating by unbalanced magnetron sputtering [115], and Ni3Al matrix composite coating by powder metallurgy [116].…”

Section: High Temperature Self-lubricating Coatingsmentioning

confidence: 99%