Performance of nanolayer CrN/Ag coated cutting tools

Yao, Shuhuai; Su, Yean-Liang; Kao, W. H.; Cheng, Kuo‐Sheng; Su, Chih-Tsong

doi:10.1179/026708410x12593178265661

Cited by 8 publications

(8 citation statements)

References 61 publications

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“…Meanwhile, the diffraction peak at 64.877 • and 77.931 • emerges since S3 and their intensities increase with the increasing l Ag . Prior studies generally prepared nitride (carbide)/Ag multilayer films with compositional layer thicknesses less than 20 nm [3,20,21]. Such layer structures show enhanced hardness and/or toughness, however, it is relatively difficult to characterize the structure evolution behavior within a thin layer.…”

Section: Microstructurementioning

confidence: 99%

On the Microstructure and Mechanical Properties of CrNx/Ag Multilayer Films Prepared by Magnetron Sputtering

Hong

Tian

et al. 2020

Materials

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CrNx/Ag multilayer coatings and a comparative CrNx single layer were deposited via reactive magnetron sputtering. In multilayer coatings, the thickness of each CrNx layer was constant at 60 nm, while that of the Ag layer was adjusted from 3 to 10 nm. Microstructure of the films was characterized by X-ray diffraction and transmission electron spectroscopy. The results suggest that the film containing 3 nm of Ag layer presents a nanocomposite structure comprising fine nano-grains and quasi-amorphous clusters. With Ag layer thickness reaching 4.5 nm and above, Ag grains coalesce to produce continuous an Ag layer and exhibit (111) preferential crystallization. Hardness of the films was detected by nanoindentation and it reveals that with increasing the Ag layer thickness, the hardness continuously decreases from 30.2 to 11.6 GPa. Wear performance of the films was examined by the ball-on-disk test at 500 °C. The result suggests that the out-diffusion of Ag towards film surface contributes to the friction reduction, while the wear performance of films depends on the thickness of the Ag layer.

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Section: Microstructurementioning

confidence: 99%

On the Microstructure and Mechanical Properties of CrNx/Ag Multilayer Films Prepared by Magnetron Sputtering

Hong

Tian

et al. 2020

Materials

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“…Transition metal nitride coatings, mainly based on titanium and chromium, have become essential in modern wear and corrosion technologies [ 3 , 4 ]. As a coating, CrN exhibits stronger wear-resistance properties than TiN because its friction coefficient is slightly lower than that of TiN [ 5 , 6 ]. CrN films have been widely used in the industry owing to their high hardness and toughness [ 7 , 8 , 9 ], good oxidation [ 10 ] and corrosion [ 11 ] resistance, prominent tribological properties [ 12 , 13 ], and excellent adhesion to substrates [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Ag has been introduced as a lubrication phase into a hard CrN matrix. Ag is a soft metal that reduces the friction of hard surfaces over a wide temperature range (from room temperature to 700 °C) [ 6 , 19 ]. Therefore, when added as a solid lubricant, it improves the tribological properties of the coating [ 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Deposition Pressure on the Microstructural and Tribological Properties of CrAgCeN Coatings Prepared by Magnetron Sputtering

et al. 2023

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This study investigates the effect of deposition pressure on the microstructure and tribological properties of CrAgCeN coatings synthesized via unbalanced magnetron sputtering. The CrAgCeN coatings presented a face-centered cubic structure. As the deposition pressure increased, the surface grain topography of the CrAgCeN coatings transformed from a looser pyramidal structure to a denser structure, while their hardness H and elastic modulus E first increased and then decreased. The strengthening effect was mainly attributable to Ag and Ce elements. Conversely, the coefficient of friction (COF) and wear rates of the coatings reduced and then increased. Under 0.6-Pa deposition pressure, the COF and wear rate of the CrAgCeN coating were minimized (0.391 and 3.2 × 10−7 mm3/(N·m), respectively) while the H and E were maximized (14.2 and 206.2 GPa, respectively). The values of hardness, wear resistance, resistance of elastic strain to failure (H/E) and resistance to plastic deformation (H3/E2) were improved for the coatings by Ce. The wear mechanisms were adhesion and delamination. The wear mechanisms were adhesion and delamination. Selecting the appropriate deposition pressure can improve the tribological properties of the CrAgCeN coatings. The received results of research in this study allow us to establish a rational coating composition for deposition on tools providing an increase in machining efficiency of the materials used in engineering. CrAgCeN coating with excellent properties may be applied to steel substrate through the combined action of corrosion, high temperature and mechanics.

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“…2 Hard coatings have been synthesised by several techniques including Direct current (DC) and radio frequency (RF)magnetron sputtering, plasma enhanced chemical vapourdeposition and cathodic arc deposition. [3][4][5][6][7][8] Recently, a novel physical vapour deposition technique named high power impulse magnetron sputtering (HiPIMS) has attracted significant intention for deposition of hard coatings. By sputtering the target with high power (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…As one member of the transition metal nitride hard coatings, binary CrN coatings have been widely used for cutting tools and punching moulds due to their relatively high hardness, good wear resistance and superior resistance to high temperature oxidation. 3,4 However, without toughness improvement, the life time of the CrN coatings can be restricted due to the propagation of cracks and abrasive wear at harsh working conditions. For longer life time and stability, many researches have been carried out to increase the toughness of the nitride hard coatings and improve the resistance to brittle fracture.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Cr–Ni–N coatings deposited by HiPIMS

Kim

Zhang

Shin

et al. 2016

Surface Engineering

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Cr-Ni-N coatings, the Ni content of which was altered from 0 to 6?3 at-%, were deposited by a hybrid coating system consisting of high power impulse magnetron sputtering and radio frequency magnetron sputtering. The effects of Ni addition to Cr-N coatings on the microstructure and mechanical properties of the coatings were investigated in this study. The instrumental analysis revealed that the Ni element was incorporated into Cr-N crystals as solid solutions, while excess Ni was precipitated as nanocrystalline phases at the Cr-N grain boundaries. The toughness of the Cr-Ni-N coatings was significantly improved with Ni content increased. In addition, the hardness of the coatings slightly increased from 30?4 to 32?6 GPa due to the grain refinement effect and solid solution hardening. From the tribological tests, the highest wear resistance was obtained from the sample having a Ni content of 2?7 at-%.

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Performance of nanolayer CrN/Ag coated cutting tools

Cited by 8 publications

References 61 publications

On the Microstructure and Mechanical Properties of CrNx/Ag Multilayer Films Prepared by Magnetron Sputtering

On the Microstructure and Mechanical Properties of CrNx/Ag Multilayer Films Prepared by Magnetron Sputtering

Effects of Deposition Pressure on the Microstructural and Tribological Properties of CrAgCeN Coatings Prepared by Magnetron Sputtering

Microstructure and mechanical properties of Cr–Ni–N coatings deposited by HiPIMS

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