On the hardness and the inherent ductility of chromium carbide nanostructured coatings prepared by RF sputtering

Jellad, A.; Labdi, S.; Benameur, Tarek

doi:10.1016/j.jallcom.2008.07.220

Cited by 25 publications

(13 citation statements)

References 16 publications

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“…In Fig. 5a) [14,15]. In contrast chromium carbide films deposited by pulsed laser deposition were amorphous and contained a large amount of additional amorphous carbon [16].…”

Section: Resultsmentioning

confidence: 97%

“…However, due to the environmental pollution that may be caused by these methods [11], recent investigations have been focused at various physical vapor deposition (PVD) techniques such as sputtering [1,3,[6][7][8][11][12][13][14][15], pulsed laser deposition [16] and arc evaporation [3][4][5]17,18] as well as chemical vapor deposition (CVD) techniques [19].…”

Section: Introductionmentioning

confidence: 99%

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Ion bombardment-induced nanocrystallization of magnetron-sputtered chromium carbide thin films

Ziebert

Stüber

et al. 2011

Surface and Coatings Technology

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“…In Fig. 5a) [14,15]. In contrast chromium carbide films deposited by pulsed laser deposition were amorphous and contained a large amount of additional amorphous carbon [16].…”

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Ion bombardment-induced nanocrystallization of magnetron-sputtered chromium carbide thin films

Ziebert

Stüber

et al. 2011

Surface and Coatings Technology

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“…(v) A comparison, with other studies e.g. Cr-C system [16,18,20] has been made. It shows that the hardness and Young's modulus are in the same order.…”

Section: Quantification Of Wearmentioning

confidence: 94%

“…According to Su et al [17] and Jellad et al [18], sputtered Cr-C films can be of practical interest in abrasive and dry-sliding wear protection applications; in particular, Cr 3 C 2 presents excellent strength, hardness, and good corrosion-resistant properties [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A study of the wear performance of duplex treated commercial low-alloy steel against alumina and WC balls

Beliardouh¹,

Nouveau²,

Walock³

et al. 2014

Surface and Coatings Technology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. The objective of this work is to study the improvement of the tribological properties of low alloy steel using a duplex treatment of low pressure carburizing and the deposition of a Cr-(WC-Co) coating by dual RF magnetron sputtering. The treatments result in a 500 μm thick carburized layer and a sputtered coating thickness of~2 μm. Tribological tests were made with a ball-on-disk tribometer under dry conditions with low load and low speed. The worn surfaces of the disk, the wear counterpart, and resulting debris were analyzed by X-ray diffraction, optical microscopy, optical profilometry, and a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer. The wear performance of the samples was evaluated in terms of wear rates and friction coefficients during the sliding processes against two different counterparts. Experimental results have shown that sliding wear, of the investigated duplex treated low alloy steels, is strongly dependent on the counterface materials. Under testing conditions, the overall wear performance of a Cr-WC coating (Cr/W ratio of 1.12:1) deposited onto the surface of a carburized low alloy steel (0.61 wt.% C; HV = 654 ± 5) can be recommended as the best. The duplex-treated samples suffered severe, concentrated wear when against alumina. This wear is characterized by a combination of delamination, mild abrasion and oxidative wear. However, the wear mechanism seems to be oxidative and adhesive when against WC balls.

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“…16 Experimentally, six different chromium borides (Cr 2 B, Cr 5 B 3 , CrB, Cr 3 B 4 , CrB 2 and CrB 4 ) are known, [17][18][19][20][21]4 and recently their mechanical characteristics were examined theoretically. 4,5,22 The experimental Vickers hardness of most Cr-B phases ranges from 20.7 to 24 GPa, 23,24 while Vickers hardness of CrB 4 phase was reported to be in a range of [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] GPa. 24 It is known from experiments, that there are three stable chromium carbides, Cr 23 C 6 , Cr 3 C 2 and Cr 7 C 3 .…”

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confidence: 99%

Computational Search for Novel Hard Chromium-Based Materials

Kvashnin

Oganov

Samtsevich

et al. 2017

J. Phys. Chem. Lett.

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Nitrides, carbides, and borides of transition metals are an attractive class of hard materials. Our recent preliminary explorations of the binary chemical compounds indicated that chromium-based materials are among the hardest transition metal compounds. Motivated by this, here we explore in detail the binary Cr-B, Cr-C, and Cr-N systems using global optimization techniques. Calculated enthalpy of formation and hardness of predicted materials were used for Pareto optimization to define the hardest materials with the lowest energy. Our calculations recover all numerous known stable compounds (except CrC with its large unit cell) and discover a novel stable phase Pmn2-CrC. We resolve the structure of CrN and find it to be of anti-CaCl type (space group Pnnm). Many of these phases possess remarkable hardness, but only CrB is superhard (Vickers hardness 48 GPa). Among chromium compounds, borides generally possess the highest hardnesses and greatest stability. Under pressure, we predict stabilization of a layered TMDC-like phase of CrN, a WC-type phase of CrN, and a new compound CrN. Nitrogen-rich chromium nitride CrN is a high-energy-density material featuring polymeric nitrogen chains. In the presence of metal atoms (e.g., Cr), polymerization of nitrogen takes place at much lower pressures; CrN becomes stable at ∼15 GPa (cf. 110 GPa for synthesis of pure polymeric nitrogen).

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On the hardness and the inherent ductility of chromium carbide nanostructured coatings prepared by RF sputtering

Cited by 25 publications

References 16 publications

Ion bombardment-induced nanocrystallization of magnetron-sputtered chromium carbide thin films

Ion bombardment-induced nanocrystallization of magnetron-sputtered chromium carbide thin films

A study of the wear performance of duplex treated commercial low-alloy steel against alumina and WC balls

Computational Search for Novel Hard Chromium-Based Materials

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