Jie Tao
Nanjing University of Aeronautics and Astronautics
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Publication
Featured researches published by Jie Tao.
Journal of Physics D | 2009
Jiang Xu; Chengzhi Zhuo; Jie Tao; Shuyun Jiang; Linlin Liu
In order to overcome the problem of corrosion wear of AISI 316L stainless steel (SS), two kinds of composite alloying layers were prepared by a duplex treatment, consisting of Ni/nano-SiC and Ni/nano-SiO2 predeposited by brush plating, respectively, and subsequent surface alloying with Ni–Cr–Mo–Cu by a double glow process. The microstructure of the two kinds of nanoparticle reinforced Ni-based composite alloying layers was investigated by means of SEM and TEM. The electrochemical corrosion behaviour of composite alloying layers compared with the Ni-based alloying layer and 316L SS under different conditions was characterized by potentiodynamic polarization test and electrochemical impedance spectroscopy. Results showed that under alloying temperature (1000 °C) conditions, amorphous nano-SiO2 particles still retained the amorphous structure, whereas nano-SiC particles were decomposed and Ni, Cr reacted with SiC to form Cr6.5Ni2.5Si and Cr23C6. In static acidic solution, the corrosion resistance of the composite alloying layer with the brush plating Ni/nano-SiO2 particles interlayer is lower than that of the Ni-based alloying layer. However, the corrosion resistance of the composite alloying layer with the brush plating Ni/nano-SiO2 particles interlayer is prominently superior to that of the Ni-based alloying layer under acidic flow medium condition and acidic slurry flow condition. The corrosion resistance of the composite alloying layer with the brush plating Ni/nano-SiC particles interlayer is evidently lower than that of the Ni-based alloying layer, but higher than that of 316L SS under all test conditions. The results show that the highly dispersive nano-SiO2 particles are helpful in improving the corrosion wear resistance of the Ni-based alloying layer, whereas carbides and silicide phase are deleterious to that of the Ni-based alloying layer due to the fact that the preferential removal of the matrix around the precipitated phase takes place by the chemical attack of an aggressive medium.
Surface Review and Letters | 2008
Han Cheng; Zhaofeng Chen; Jie Tao; Bo Yan; Cong Li; Liangbing Wang; Ying Zhang; Dan Fang; Shuicheng Wan; Wangping Wu
Aircrafts hold the outstanding mastery of the sky in modern wars, however the laser beam weapons can carry out laser attacking to aircrafts. The purpose of the present paper is to research on a new type laser protective material. Polycarbosilanes (PCS)/divinylbenzene mixtures containing ZrO2 powders were brushed to the surface of the aluminum alloy plates and then cured at 150°C for 6 h. The PCS-coated plates were ablated by laser for 3 s. The phase identification of as-ablated powders was examined by X-ray diffraction. The results indicated that the as-ablated powders of cured PCS were composed of major phase β-SiC and smaller amounts of free carbon. The PCS composite coating played a certain role of laser ablation resistance. The effect of added ZrO2 powders on the pyrolysis of PCS-coating under laser ablation is conspicuous.
Journal of Polymer Engineering | 2009
Zhaofeng Chen; Han Cheng; Jie Tao; Shuicheng Wan; Wangping Wu
Aircrafts hold the outstanding mastery of the sky in modern wars. However, the laser beam weapons can carry out laser attacking to aircrafts. The present paper proposes a new type of coating of laser resistance. Polycarbosilanes (PCS)/divinylbenzene mixtures were brushed to the surface of the Al alloy plates and then cured at 150°C for 6h. The PCS-coated plates were ablated by 1kW laser beam for 1s, 3s, 5s, and 10s. The phase identification of the as-ablated powders was examined by X-ray diffraction. The ablation degree was evaluated by testing the volume change. The results indicated the PCS coating played a certain role in protecting the Al alloy plates by absorbing the laser energy. The residual powders after ablation were composed of major phase β-SiC and smaller amounts of free carbon. Although PCS coating was destroyed while 10s irradiation time, the Al alloy plate was protected. The ablated volume of the coating was consistent with the irradiation time according to a multinomial equation.
Surface Review and Letters | 2008
Jiang Xu; Jie Tao; Chenzhi Zhuo; Shuyun Jiang
In order to improve the high-temperature behaviors of hot work die steel in engineering application, the high-temperature wear and thermal fatigue behavior of brush plating Ni/nano-SiO2 composite coating have been investigated. The microstructure of Ni/nano-SiO2 composite coating has been analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM observation of Ni/nano-SiO2 composite coating has shown that the added SiO2 particle with an average size of about 20 nm is uniformly distributed in Nickel matrix. The high-temperature wear behavior of Ni/nano-SiO2 composite coating has been investigated using a ball-on–block test rig. The results from the high-temperature wear behaviors studies indicate that the steady-state friction coefficient and the specific wear rate of Ni/nano-SiO2 composite coating are lower than that of Cr12MoNi steel. The thermal fatigue tests were fulfilled by heating and quenching in water at a cycle period of 2 min. The results of thermal fatigue testing show that brush plating Ni/nano-SiO2 composite coating can improve thermal fatigue resistance as compared to the Cr12MoNi hot rolling tool steel.
Surface & Coatings Technology | 2009
Hongbing Liu; Jie Tao; Jiang Xu; Zhaofeng Chen; Qiang Gao
Corrosion Science | 2009
Jiang Xu; Chengzhi Zhuo; Dezhong Han; Jie Tao; Linlin Liu; Shuyun Jiang
Applied Surface Science | 2009
Xiang Dong; Jie Tao; Yingying Li; Hong Zhu
Applied Surface Science | 2010
Xiang Dong; Jie Tao; Yingying Li; Hong Zhu
Scripta Materialia | 2007
Jiang Xu; Zhong Xu; Jie Tao; Zili Liu; Zheyuan Chen; Wenhui Zhu
Applied Surface Science | 2008
Jiang Xu; Jie Tao; Shuyun Jiang; Zhong Xu