Designing superhard, self-toughening CrAlN coatings through grain boundary engineering

Zhao, Li; Munroe, Paul; Jiang, Zhong‐Tao; Zhao, Xiaoli; Xu, Jiang; Zhou, Zhifeng; Jiang, Jianqing; Fang, Feng; Xie, Zonghan

doi:10.1016/j.actamat.2012.06.049

Cited by 120 publications

(70 citation statements)

References 38 publications

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“…The XTEM method was used to observe the factors influencing the mechanical properties of CrSiN coatings with the progressive addition of Si-content while XPS and nanoindentation methods elucidated the surface chemical composition and physical hardness, elastic modulus and residual stress, respectively. Grazing incidence X-ray diffraction (GIXRD) patterns of CrN coatings had been reported to be unaffected with the Al-doping [38]. Undoped samples and samples doped with low, medium and high amounts of Al were identified to be cubic structure; however, other studies reported the existence of wurtzite structure of CrN with Al-doping.…”

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 94%

“…Undoped samples and samples doped with low, medium and high amounts of Al were identified to be cubic structure; however, other studies reported the existence of wurtzite structure of CrN with Al-doping. XPS study [38] found the existence of an amorphous phase of AlN at the grain boundaries. Preferred orientations have been found to be altered by the Al-substitutions.…”

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

“…Preferred orientations have been found to be altered by the Al-substitutions. According to the GIXRD data, it had been observed that (200) preferred orientation was reduced monotonically with the increase in Al-content while a linear increase in the intensity was observed on (111) and (220) reflection planes [38].…”

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

“…Transition metal nitrides (i.e., CrN, TiN etc) have been found to show superhardness (hardness > 40 GPa) with suitable doping (i.e., Si, Al etc.) [14][15][16]38]. The Si or Al dopant significantly modifies the microstructures of the binary compounds from closely-packed columnar grains into nanocrystalline structures embedded in an amorphous matrix [14][15].…”

Section: Hardness Test Of Crsin and Cralnmentioning

confidence: 99%

“…Structural characterizations of CrSiN and CrAlN films has been previously performed by means of cross-sectional bright field TEM (XTEM), high resolution X-ray photoelectron spectroscopy (HRXPS), XRD and nanoindentation techniques [38]. The XTEM method was used to observe the factors influencing the mechanical properties of CrSiN coatings with the progressive addition of Si-content while XPS and nanoindentation methods elucidated the surface chemical composition and physical hardness, elastic modulus and residual stress, respectively.…”

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

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Near-edge X-ray absorption fine structure studies of Cr1−xMxN coatings

Rahman

Duan

Jiang

et al. 2013

Journal of Alloys and Compounds

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Near-edge X-ray absorption fine structure studies of Cr 1-x M x N coatings, (2013), doi: http://dx.doi.org/10. 1016/ j.jallcom.2013.06.021 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractCr 1-x M x N coatings, with doping concentrations (Si or Al) varying from 14.3 to 28.5 at.%, were prepared on AISI M2 tool steel substrates using a TEER UDP 650/4 closed field unbalanced magnetron sputtering system. Near-edge X-ray absorption fine structure (NEXAFS) characterization was carried out to measure the aluminum and silicon Kedges, as well as chromium L-edge, in the coatings. Two soft X-ray techniques, Auger electron yield (AEY) and total fluorescence yield (TFY), were employed to investigate the surface and inner structural properties of the materials in order to understand the structural evolution of CrN matrix with addition of Al (or Si) elements. Investigations on the local bonding states and grain boundaries of the coatings, using NEXAFS technique, provide significant information which facilitates understanding of the local electronic 2 structure of the atoms and shed light on the origins of the high mechanical strength and oxidation resistance of these technologically important coatings.

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Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 94%

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

Section: Hardness Test Of Crsin and Cralnmentioning

confidence: 99%

Section: Structural Characterization Of Crsin and Craln Thin Film Coamentioning

confidence: 99%

See 3 more Smart Citations

Near-edge X-ray absorption fine structure studies of Cr1−xMxN coatings

Rahman

Duan

Jiang

et al. 2013

Journal of Alloys and Compounds

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Investigations on Mechanical and Tribological Behavior of dcMS/HPPMS CrN and (Cr,Al)N Hard Coatings Using Nanoscratch Technique

et al. 2017

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In this paper, interfacial adhesion strength and tribological behavior of systems, consisting of CrN and (Cr,Al)N coatings and AISI 420 steel substrate are investigated. The coatings are deposited using a hybrid technology consisting of direct current and high power pulse magnetron sputtering dcMS/HPPMS. Conventional Rockwell and scratch tests as well as nanoscratch analyses are performed. For the nanoscratch tests, a Berkovich and a conical indenters are used. Damage mechanisms are analyzed using Scanning Electron Microscopy (SEM) and explained by the plastic work from the nanoindentation tests. Investigations show a stronger interfacial adhesion strength and a higher abrasion resistance of the system AISI 420/(Cr,Al)N compared to the AISI 420/CrN.

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Flexible Protective Film: Ultrahard, Yet Flexible Hybrid Nanocomposite Reinforced by 3D Inorganic Nanoshell Structures

Bae

Choi

Ahn

et al. 2021

Adv Funct Materials

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Emerging flexible optoelectronics requires a new type of protective material that is not only hard but also flexible. Organic–inorganic (O–I) hybrid materials have been used as a flexible cover window to increase wear resistance and polymer‐like flexibility. However, the hardness of O–I hybrid materials is much lower than that of metals and ceramics due to the low intrinsic hardness of the organic matrix and limited volume fraction of inorganic reinforcement. Herein, a new type of hybrid nanocomposite combining an O–I hybrid material with continuous and ordered 3D inorganic nanoshell as an additional reinforcement is proposed. The 3D alumina nanoshell uniformly embedded in the epoxy‐siloxane molecular hybrid (ESMH) enables a rule of mixture without a loss in flexibility. Two types of reinforcements comprising siloxane molecules and 3D alumina shell ensure a metal‐like hardness (1.3 GPa), which is significantly higher than that of the typical polymers and polymer nanocomposites. The 3D hybrid nanocomposite films show superb impact resistance due to the 3D alumina nanoshell that effectively suppresses crack propagation. Inch‐scale 3D hybrid nanocomposite films also endure 20 000 bending cycles without failure and maintain high transparency (>82.0% at 550 nm) in the visible regions.

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Designing superhard, self-toughening CrAlN coatings through grain boundary engineering

Cited by 120 publications

References 38 publications

Near-edge X-ray absorption fine structure studies of Cr1−xMxN coatings

Near-edge X-ray absorption fine structure studies of Cr1−xMxN coatings

Investigations on Mechanical and Tribological Behavior of dcMS/HPPMS CrN and (Cr,Al)N Hard Coatings Using Nanoscratch Technique

Flexible Protective Film: Ultrahard, Yet Flexible Hybrid Nanocomposite Reinforced by 3D Inorganic Nanoshell Structures

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