Oxidation,Mechanical Properties of TiAlN and TiAlSiN Coatings Deposited on WC-(Ti,Ta,Nb)C-Co Cemented Carbide

摘要：

　　TiAlN and TiAlSiN coatings were deposited on WC-(Ti,Ta,Nb)C-Co substrates by the cathodic arc evaporation technique.Microstructure structure,antioxidation and mechanical properties of coatings were investigated by means of X-ray diffraction (XRD),scanning electron microscope/Energy Dispersive Spectrometer (SEM/EDS),micro and nano-indentation measurement,nano-scratch tester and high temperature oxidation experiment.With the incorporation of Si,the mean crystallite sizes of TiAlN coating decrease from 23.33 nm to 13.56 nm,the thickness of oxidized layer of TiAlN coating decrease from 1.63 μm to 0.643 μm after oxidation at 900 ℃ for 2 h.Due to the addition of Si,the nano-hardness of TiAlN coating improve from 28.32 GPa to 38.5 GPa,the micro-hardness of TiAlN coated cemented carbide also increase as-deposited and after oxidation at 800 ℃ for 15 min with the loads from 0.05 kgf to 0.5 kgf.However,the adhesion of TiAlSiN coating to substrate is worse than that of TiAlN coating.

关键词： TiAlN and TiA1SiN coating oxidation hardness adhesion

作者: Xu Yinchao Chen Kanghua Wang Shequan Chen Li Zhu Changjun Li Jia

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Zhuzhou Cem State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China Zhuzhou Cemented Carbide Cutting Tools Co.Ltd.,Zhuzhou 412007,China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 307-313

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）