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Journal of Central South University

, Volume 18, Issue 2, pp 310–313 | Cite as

Effect of Al and Si additions on microstructure and mechanical properties of TiN coatings

  • She-quan Wang (王社权)
  • Kang-hua Chen (陈康华)Email author
  • Li Chen (陈利)
  • Chang-jun Zhu (祝昌军)
  • Ping Li (李屏)
  • Yong Du (杜勇)
Article

Abstract

Ti-X-N (X=Al, Si or Al+Si) coatings were grown onto cemented carbide substrates by cathodic arc evaporation. The hardness of the coatings was obtained by nanoindentation and the microstructure was investigated by XRD, XPS and SEM. Solid solution hardening results in a hardness increase from 24 GPa for TiN to 31.2 GPa for TiAlN. The higher hardness values of 36.7 GPa for TiSiN and 42.4 GPa for TiAlSiN are obtained by the incorporation of Si into TiN (TiAlN) coatings due to the formation of special three-dimensional net structure consisting of nanocrystalline (nc) TiN (TiAlN) encapsulated in an amorphous (a) Si3N4 matrix phase. Furthermore, the nc-TiAlN/a-Si3N4 coating shows the best machining performance.

Key words

TiN coating alloying element hardness cutting test 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • She-quan Wang (王社权)
    • 1
    • 2
  • Kang-hua Chen (陈康华)
    • 1
    Email author
  • Li Chen (陈利)
    • 2
  • Chang-jun Zhu (祝昌军)
    • 1
  • Ping Li (李屏)
    • 2
  • Yong Du (杜勇)
    • 1
  1. 1.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina
  2. 2.Zhuzhou Cemented Carbide Cutting Tools Co., LtdZhuzhouChina

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