Structural optimisation and electrochemical behaviour of AlCrN coatings

Chen, Mohan; Wu, Dongqing; Chen, Wanglin; Zhang, Shihong

doi:10.1016/j.tsf.2016.06.032

Cited by 27 publications

(4 citation statements)

References 37 publications

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“…The crack generated under this load was related to the strength of the coating. As shown in region IV, at the end of the scratch, delaminated particles and agglomerated fragments accumulated in the coating were found due to the movement of the indentation [26-28]. In Figure 8, the EDS at the tail spectrum 2 of the coating S2 indicated that the main components were Ti and Al, corresponding to the exposure of substrate at the later period of scratch test.…”

Section: Resultsmentioning

confidence: 99%

Effect of CrAl interlayer on adhesion strength of CrAlN coating

Zhao

Miao

Liang

et al. 2019

Surface Engineering

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CrAlN coating is widely used to prevent Ti alloy from wear nowadays, however, the poor adhesion between the coating and substrate is an urgent problem to resolve. In this paper, CrAlN coating with CrAl intermediate layer is prepared on Ti alloy by RF magnetron sputtering technique. The adhesion strength of the coating is measured by automatic scratch tester. The results show that the adhesion strength of CrAl/CrAlN coating is much higher than that of mono-layer CrAlN coating. The CrAl layer with thickness of 5.07 μm displays an excellent adhesion strength, which is 84.2 N. The nano-hardness and elastic modulus are 26.45 and 215.33 GPa, respectively. The improvement of adhesion strength can be attributed to the two reasons: (1) the elastic modulus of the CrAl layer is between the Ti alloy and the CrAlN coating, playing a role of stress transition. (2) The intermediate layer inhibits the columnar growth of CrAlN.

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Section: Resultsmentioning

confidence: 99%

Effect of CrAl interlayer on adhesion strength of CrAlN coating

Zhao

Miao

Liang

et al. 2019

Surface Engineering

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“…It was reported that the addition of Al in the CrN coating could increase the hardness because of the solid solution hardening effect. In addition, the thermal stability and oxidation resistance of the CrAlN coating are also greatly enhanced because the Gibbs free energy of Al 2 O 3 is lower than that of Cr 2 O 3 [5,6]. It has been reported that the Al 2 O 3 phase is more thermally stable and protective than the Cr 2 O 3 phase at high temperatures [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Al Content on the Microstructure and Properties of the CrAlN Coatings Deposited by Arc Ion Plating

Fan

Zhang

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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Four CrAlN coatings with various Al content were prepared by arc ion plating technology under different target currents. The effect of the Al content on the microstructure, chemical compositions, element chemical bonding states and mechanical properties of the CrAlN coatings was analyzed. X-ray diffraction results show that the primary phase of the CrAlN coating is fcc-(Al, Cr)N when the Al content is about 44.02 at.%. However, when the Al content increases to about 53.34 at.%, hcp-AlN phase emerges in the coating. And the hcp-AlN phase becomes the main phase in the CrAlN coating with Al content of about 69.55 at.%. Cross-sectional images show that all the four coatings possess dense structures and the deposition rate of Al atom is higher than that of Cr atom. The hardness of the CrAlN coating with Al content about 44.02 at.% is the largest (3149.72 HV) due to the solid solution hardening effect of the Al element. When the hcp-AlN phase is generated in the CrAlN coating, the hardness declines. The tribological experiment shows that the wear resistance of the CrAlN coating decreases gradually with increasing Al content when sliding against 100Cr6 steel ball.

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“…The bonding strength of coating/substrate interface was a key indicator for evaluating the quality of coating, there were many methods such as stretching, bending, ultrasonic test, laser peeling, and indentation methods, among them, as a practical test method, the scratch method was widely used to measure the bonding strength of hard coating/substrate due to its good repeatability. During the scratch test, the indenter was drawn at a certain speed on the coating surface, and the coating peeled off from the substrate at the critical load ( L c ) .…”

Section: Analysis and Discussionmentioning

confidence: 99%

Microstructure, bonding strength, and friction–wear performance of AlCrN/nitrided layer composite coating on H13 hot work mould steel

Zhou

Dejun

2019

Int J Applied Ceramic Tech

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An AlCrN/nitrided layer (NL) composite coating was fabricated on H13 hot work mould steel using a cathode arc ion plating and low temperature plasma nitriding. The surface and cross‐section morphologies, chemical composition, phases, and roughness of AlCrN/NL coating were analyzed using a scanning electron microscope (SEM), energy dispersive spectrometer, X–ray diffractometer (XRD), and atomic force microscope, respectively, the friction–wear performances of AlCrN/NL coatings at 400, 500, and 600°C were investigated using a high‐temperature wear test. The results show that the AlCrN/NL coating with the surface roughness of 76.8 nm forms the AlN phase, which increase its hardness from 1088 HV of NL to 2381 HV. The average coefficients of friction (COFs) of AlCrN/NL coating at 400, 500, and 600°C are 0.70, 0.55, and 0.56, respectively, and the corresponding wear rates are 1.59 × 10−5, 9.77 × 10−5, and 3.93 × 10−5 mm3/N/m, respectively, as a result, the lowest average COF and wear rate are at 500 and 400°C respectively. The wear mechanism of AlCrN/NL coating at 400°C is primary abrasive wear, accompanied by adhesive wear, while those at 500 and 600°C are primary adhesive wear, accompanied by abrasive wear.

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Structural optimisation and electrochemical behaviour of AlCrN coatings

Cited by 27 publications

References 37 publications

Effect of CrAl interlayer on adhesion strength of CrAlN coating

Effect of CrAl interlayer on adhesion strength of CrAlN coating

Influence of Al Content on the Microstructure and Properties of the CrAlN Coatings Deposited by Arc Ion Plating

Microstructure, bonding strength, and friction–wear performance of AlCrN/nitrided layer composite coating on H13 hot work mould steel

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