Microstructure, mechanical properties, and milling performance of arc-PVD AlTiN-Cu and AlTiN/AlTiN-Cu coatings

Chen, Hao; Chen, Kanghua; Xu, Yinchao; Pan, Chenxi; Jiao, Yi; Zhu, Changjun

doi:10.1007/s11771-018-3755-2

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…This can be attributed to the impurities in metal Cu(Ni) hindering grain growth. This stimulates the re-nucleation of grains during the coating deposition [22][23][24]. Myung et al [20] found that ~1.5 at.% Cu is sufficient to form a dense nanocrystal TiN-Cu nanocomposite coating without a columnar structure.…”

Section: Microstructure and Compositionmentioning

confidence: 99%

“…It is likely possible to enhance cutting performance for hard-to-machine materials by improving coatings' oxidation resistance and reducing their friction coefficient simultaneously. According to previous studies, an AlTiN-Cu(Ni) coating with~1.5% Cu(Ni) can exhibit excellent mechanical properties and can demonstrate an excellent cutting performance [22,23]. However, little research has been directed towards the contrasts between AlTiN, AlTiN-Ni, and AlTiN-Cu coatings.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Properties, and Titanium Cutting Performance of AlTiN–Cu and AlTiN–Ni Coatings

Jiao

Chen

2019

Coatings

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In this study, three kinds of coatings, AlTiN, AlTiN–Ni, and AlTiN–Cu were deposited via the cathodic arc evaporation method. The microstructure, mechanical properties, oxidation resistance, and cutting behavior of these coatings were then investigated. The incorporation of Cu(Ni) into AlTiN eliminated its columnar structure and led to an increase in the growth defects of its macroparticles. The addition of Cu and Ni decreased the hardness of the coatings, their elastic moduli, and their friction coefficients. All of the AlTiN, AlTiN–Ni, and AlTiN–Cu coatings presented sufficient adhesion strength values. The oxidation resistance of these three coatings was determined to be in the following order: AlTiN > AlTiN–Ni > AlTiN–Cu. Titanium turning experiments indicated that the cutting force was reduced and the tool life was improved through doping with Cu(Ni) elements, dependent on cutting speed. The AlTiN–Ni coating showed the best performance at a high cutting speed, whereas the AlTiN–Cu coating was more successful at a lower cutting speed.

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Section: Microstructure and Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure, Properties, and Titanium Cutting Performance of AlTiN–Cu and AlTiN–Ni Coatings

Jiao

Chen

2019

Coatings

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“…Generally, when the depth of the indentation is higher than 1/10 of the thickness of the coating, the test results show some contribution from the substrate 10. According to our previous research [29], the indentation depth was ~200 nm during the nanoindentation test under a loading force of 10 mN. Table 3 shows that the hardness of TiAlN/WT1, TiAlN/WT2, TiAlN/WT3 and TiAlN/WT4 is 27.9, 24.6, 22.9 and 30.1 GPa, respectively.…”

Section: Mechanical Propertiesmentioning

confidence: 78%

Effect of TiC Content and TaC Addition in Substrates on Properties and Wear Behavior of TiAlN-Coated Tools

Jiao

Xu²,

Liu

et al. 2022

Coatings

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The present paper reports a new way to improve the wear resistance of coated carbide tools by increases in TiC content and the addition of TaC in substrates. The results suggest that the average grain size of the substrate increased with the increases in TiC (0–14 wt.%) content, and the hardness of the TiAlN coating deposited on the substrate exhibits a similar trend. In addition, the adhesion strength of the TiAlN-coated carbide increases with increasing TiC content, which can be attributed the formation of the (Ti,W)C phase and the similar hardness of the substrate and coating. The addition of TaC into the substrates inhibits the grain growth and thereby causes the hardness and adhesion strength of the TiAlN coatings to improve from 24.6 GPa and 16.7 N to 30.1 GPa and 17.3 N, respectively. In turning tests, the TiAlN coating deposited on the substrates with the TaC addition achieved the best wear resistance in turning stainless steel because it possessed the highest substrate and coating hardness and sufficient adhesion strength. However, the TiAlN coating deposited on the substrates with a higher TiC content shows the better wear resistance in turning titanium (TC4), which can be attributed to it having the highest adhesion strength.

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“…At the same time, large amount deformation occurs at the interface between the oxide film and the substrate, and a scratch appearance of the ductile penetration is generated. The oxide film does not have wedge‐shaped spalling, which indicates that the residual internal stress of the oxide film is small and the oxide film is well bonded to the substrate [21,22] …”

Section: Resultsmentioning

confidence: 99%

“…The oxide film does not have wedgeshaped spalling, which indicates that the residual internal stress of the oxide film is small and the oxide film is well bonded to the substrate. [21,22] NiCrAl oxide layer can be used to prepare the insulating layer of heating element, and the heating circuit is screen printed on NiCrAl superalloy with the size of 20 mm × 25 mm × 0.5 mm, and then the guide belt is screen printed at the lower end of the heating circuit. The function of the guide belt is to weld the conductor as the connector between the heating circuit and the conductor.…”

Section: Bonding Strength Between Oxide Film and Substratementioning

confidence: 99%

Oxidation Behavior and Interfacial Bonding Properties of NiCrAl Alloys

Song

et al. 2022

ChemistrySelect

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The oxidation behavior and oxidation kinetics of NiCrAl alloy were studied by XRD, SEM and the thermogravimetric analysis method. The adhesion strength of the films was characterized by micron scratch tester. The results show that the oxide film has not formed at 600 °C and 700 °C, and an oxide layer of Al2O3 has formed at 800 °C. Moreover, an oxide layer composed of Cr2O3 and Al2O3 has formed at 900 °C. After oxidation at 800 °C for 100 h, partial θ‐Al2O3 has transformed to steady‐state α‐Al2O3 and a dense oxide film of Al2O3 with the thickness of about 620 nm has formed on the surface of the NiCrAl alloy. The oxidation kinetics curve of the alloy obeys the parabolic law and there are two oxidation rate constants in the oxidation process. The oxidation rate constant of 1.58×10−4 mg2⋅cm−4⋅h−1 in the early oxidation period (0∼12 h) and the oxidation rate constant of 1.04×10−4 mg2⋅cm−4⋅h−1 in the late oxidation period (12∼100 h) indicate that the oxidation resistance ability of the alloy increases with the extension of oxidation time. With the increase of the oxidation time, the interface bonding strength between the oxide film and the substrate can be improved and reaches 5.21 N at 800 °C for 100 h.

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Microstructure, mechanical properties, and milling performance of arc-PVD AlTiN-Cu and AlTiN/AlTiN-Cu coatings

Cited by 12 publications

References 20 publications

Microstructure, Properties, and Titanium Cutting Performance of AlTiN–Cu and AlTiN–Ni Coatings

Microstructure, Properties, and Titanium Cutting Performance of AlTiN–Cu and AlTiN–Ni Coatings

Effect of TiC Content and TaC Addition in Substrates on Properties and Wear Behavior of TiAlN-Coated Tools

Oxidation Behavior and Interfacial Bonding Properties of NiCrAl Alloys

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