Nanostructured multi-element (TiZrNbHfTa)N and (TiZrNbHfTa)C hard coatings

Braic, V.; Vlădescu, Alina; Bâlâceanu, M.; Luculescu, C.; Braic, M.

doi:10.1016/j.surfcoat.2011.09.033

Cited by 245 publications

(110 citation statements)

References 21 publications

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“…The main advantages of ion implantation are preservation of sample sizes, locality (small projective path), high reproducibility, absence of problems with adhesion etc. [7][8][9][10][11][12][13][14][15]. In order to improve the properties of metals, alloys and ceramics, it is necessary to use high doses of ion implantation, from typically 5Á10 16 up to 5x10 17 cm À2 [16].…”

Section: Introductionmentioning

confidence: 99%

“…A new class of materials -high-entropy alloys (HEA), which consist of at least 5 atoms with atomic content from 5 to 35 at% -are under great interest nowadays due to their exceptional wealth of physical-mechanical characteristics [8][9][10][11]13,12,[16][17][18][19][20][21][22]. Several works have been performed so far to obtain a comprehensive understanding of the effect of constitutive elements on the microstructure, phase composition and mechanical properties of HEA [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured multielement (TiHfZrNbVTa)N coatings before and after implantation of N+ ions (1018cm−2): Their structure and mechanical properties

Pogrebnjak

Бондар

Borba

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tMultielement high entropy alloy (HEA) nitride (TiHfZrNbVTa)N coatings were deposited by vacuum arc and their structural and mechanical stability after implantation of high doses of N + ions, 10 18 cm À2 , were investigated. The crystal structure and phase composition were characterized by X-ray diffraction (XRD) and Transmission Electron Microscopy, while depth-resolved nanoindentation tests were used to determine the evolution of hardness and elastic modulus along the implantation depth. XRD patterns show that coatings exhibit a main phase with fcc structure, which preferred orientation varies from (1 1 1) to (2 0 0), depending on the deposition conditions. First-principles calculations reveal that the presence of Nb atoms could favor the formation of solid solution with fcc structure in multielement HEA nitride. TEM results showed that amorphous and nanostructured phases were formed in the implanted coating sub-surface layer ($100 nm depth). Concentration of nitrogen reached 90 at% in the near-surface layer after implantation, and decreased at higher depth. Nanohardness of the as-deposited coatings varied from 27 to 38 GPa depending on the deposition conditions. Ion implantation led to a significant decrease of the nanohardness to 12 GPa in the implanted region, while it reaches 24 GPa at larger depths. However, the H/E ratio is P0.1 in the sub-surface layer due to N + implantation, which is expected to have beneficial effect on the wear properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanostructured multielement (TiHfZrNbVTa)N coatings before and after implantation of N+ ions (1018cm−2): Their structure and mechanical properties

Pogrebnjak

Бондар

Borba

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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“…Out of various types of wear-resistant coatings, developed and implemented in recent years, multilayered composite coatingswith gradient structure, as well as multi-component coatings should be noted [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…A series of studies have tested the properties of multicomponent nano-structured coatings [9][10][11][12]. Braic et al [9,10] studied the properties of nitride system (TiZrNbHfTa)N, which composition, in addition to Zr, Nb and Ti, also includes Hf and Ta.…”

Section: Introductionmentioning

confidence: 99%

“…Braic et al [9,10] studied the properties of nitride system (TiZrNbHfTa)N, which composition, in addition to Zr, Nb and Ti, also includes Hf and Ta. Pogrebnjak et al [11] and Blinkov et al [12] considered the study of the properties of multi-composite coatings on the basis of nitride systems (TiHfZrVNb)N, which composition also includes Hf and V, as well as systems (TiAlCrZrNb)N and (TiAlCrZrNb)N, which composition is modified through introduction of Al and Cr.…”

Section: Introductionmentioning

confidence: 99%

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Research of mechanical and cutting properties, wear and failure mechanisms of nano-structured multilayered composite coating Ti-TiN-(NbZrAl)N

Vereschaka¹,

Кутьин²,

Sitnikov³

et al. 2016

Epitoanyag - JSBCM

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the paper studies mechanical properties (in particular, adhesion characteristics), as well as wear and failure pattern of nano-structured multilayered composite coating ti-tin-(nbzrAl)n. cutting properties of a carbide tool with the above coating are studied in turning of steel c45, in comparison with an uncoated tool and a tool with reference coating tin. it was found that tool life of the tool with the coating under study is 2.7-3.6 times higher than tool life of the uncoated tool and 1.8-2.2 times higher than that tool life of the tool with coating tin. the conducted microstructural studies have shown a significant difference in wear and failure mechanisms and, in particular, in mechanisms of cracking, for the coating under study and the coating tin. Failure mechanism of coating in the course of the study of strength of adhesion bonds is consistent with its failure mechanism during the study of cutting properties.

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A Review on High Entropy Alloys Coatings: Fabrication Processes and Property Assessment

et al. 2019

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Surface coatings can enhance the mechanical and functional properties of substrates and keep good balance between specific mechanical properties and sufficient surface performance of the components. Coatings composed of high entropy alloys (HEAs) and HEA‐based materials, including metallic, ceramics, and composites have attracted the global attention and developed rapidly over the last decade, owing to their outstanding properties. Here, the authors provide a critical review of the state‐of‐the‐art for HEA‐based coatings, aiming to address the related conceptions, designing principles, microstructural, and mechanical evolutions during fabrication and post‐treatments process. The surface properties which are not limited to anti‐corrosion, anti‐radiation, and anti‐diffusion and their underlying mechanisms are analyzed. The development tendency and future applications are classified and discussed, including the basic researches about HEAs, the regulations of fabrication techniques and the exploring of functional properties of HEA‐based coatings. Due to their superior mechanical and functional potentials as well as abundant element‐constitutions of designing, surface coatings composed of HEA‐based materials are considered to have promising applications in engineering and industrial manufacturing.

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Nanostructured multi-element (TiZrNbHfTa)N and (TiZrNbHfTa)C hard coatings

Cited by 245 publications

References 21 publications

Nanostructured multielement (TiHfZrNbVTa)N coatings before and after implantation of N+ ions (1018cm−2): Their structure and mechanical properties

Nanostructured multielement (TiHfZrNbVTa)N coatings before and after implantation of N+ ions (1018cm−2): Their structure and mechanical properties

Research of mechanical and cutting properties, wear and failure mechanisms of nano-structured multilayered composite coating Ti-TiN-(NbZrAl)N

A Review on High Entropy Alloys Coatings: Fabrication Processes and Property Assessment

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