Title

EFFECT OF ADDITIONAL ELEMENTS ON MICRISTRUCTURE AND PROPERTIES OF CR-N BASED COMPOSITE COATINGS

EFFECT OF ADDITIONAL ELEMENTS ON MICRISTRUCTURE AND PROPERTIES OF CR-N BASED COMPOSITE COATINGS

Authorship

BAO, MINGDONG; SUN, HAILIN; LIANG, ROU; XU, XUEBO; YU, LEI

BAO, MINGDONG

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SUN, HAILIN

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LIANG, ROU

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XU, XUEBO

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YU, LEI

I am this author

DOI

10.5151/2594-5327-16964

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Abstract

CrMoN and CrWN composite coatings were deposited unsing closed field unbanlanced magnetron sputter ion plating system. The microstructure, preferred orientation and morphology of coatings were determined by X-ray diffraction analysis and SEM observation. Influence of additional elements on the microstructure, adhesion, mechanic and tribological properties have been investigated. XRD Results showed that preferred orientation of CrMoN and CrWN coatings changed obviously as compared with the pure CrN coating. All of the new compostie coatings exhibited excellent adhesion due to the gradient interface layer design. By introducing Mo and W elements into the CrN-based structure, the coating hardness improved in comparision with the pure CrN coatings. Results also showed the wear resistance of CrMoN and CrWN coatings increased clearly. The steady-state dry friction coefficients measured against a WC-6%Co ball for the new compostie coatings are about 0.3, which were significant dropped than that of pure CrN coaing of 0.5. It is expected that these advantageous properties can enable these new compsite coatings for a wide range of applications such as dry high-speed cutting.

CrMoN and CrWN composite coatings were deposited unsing closed field unbanlanced magnetron sputter ion plating system. The microstructure, preferred orientation and morphology of coatings were determined by X-ray diffraction analysis and SEM observation. Influence of additional elements on the microstructure, adhesion, mechanic and tribological properties have been investigated. XRD Results showed that preferred orientation of CrMoN and CrWN coatings changed obviously as compared with the pure CrN coating. All of the new compostie coatings exhibited excellent adhesion due to the gradient interface layer design. By introducing Mo and W elements into the CrN-based structure, the coating hardness improved in comparision with the pure CrN coatings. Results also showed the wear resistance of CrMoN and CrWN coatings increased clearly. The steady-state dry friction coefficients measured against a WC-6%Co ball for the new compostie coatings are about 0.3, which were significant dropped than that of pure CrN coaing of 0.5. It is expected that these advantageous properties can enable these new compsite coatings for a wide range of applications such as dry high-speed cutting.

Keywords

CrN based compsite coating; Microstructure; Hardness; Tribological behaviour.

CrN based compsite coating; Microstructure; Hardness; Tribological behaviour.