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  • 今天新疆时时彩开奖码:网易能买彩票

    Nanocomposite Coatings by PEMS

    网易能买彩票 www.qjlz.net Nano Composite Structure and Plasma Enhanced Magnetron Sputter (PEMS) Technology

    When material particle diameter is less than 100 nano, this kind of material is called nano materials. Nano-scale coating
    has excellent hardness, toughness, wear resistance, corrosion resistance and the durability of the whole.
    The SwRI is in leading status on nano technology study, such as titanium (TiN) coating which was used for tools inserts,
    and diamond-like coating for hard disk of computers which is very thin (less than 10 nm) and of excellent performance.
    In addition, SwRI is engaged of TiSiCN coating study, which is a kind of nano composite coatings with both excellent strength and hardness , and greatly enhance the severe situation of particles antiscouring abrasion performance,liquid particle erosion wear, and won't lead to base material fatigue and yield strength of change.

                       

    Figure (a) Dense and featureless microstructures                  Figure(b) Nano-composite coatings

    of TiSiCN Nano composite coatings                                            structure schematic diagram


     

           

    Erosive wear test data from American southwest research institute and Canadian national laboratory

     

                  

    Figure(a) Frictional factor  Figure                   (b) The wear rate of uncoated film Ti-6Al-4V and wear rate of
                                                                                   TiSiCN coatings under the variable coating film process

     

    Using the PEMS deposition technology, the super-hard, extreme thick, wear-resistant and corrosion resistant coatings
    can be obtained, which is widely used for gas turbine compressor blades surface enhanced against solid particle erosion
    (SPE) and oxidation resistant nozzles for rocket engine. Shown in Figure a is schematic of plasma enhanced magnetron
    sputter technology (PEMS), while the Figure b is photograph of sample coating film process. This technology is
    based on magnetron sputter deposition, a physical vapor deposition (PVD) process. In conventional magnetron sputter
    deposition, the parts are installed inside a vacuum chamber. After the vacuum system is pumped down, gas is fed in, and
    when the negative voltage is applied to the magnetron, the plasma is generated. Plasma is defined as the discharging gas
    with ions, electrons and excited neutrals. The negatively biased voltage draws ions from the plasma to the target which
    is mounted on the magnetron. High energy ions bombard the target surface and result in sputtering of the target material,
    which are then deposited on to the surface of the parts.

     

             

    Figure (a) PEMS system schematic process                      Figure (b) A photograph of the PEMS

  • 山西:今年汛期降雨量偏多 各部门未雨绸缪全力备汛 2019-07-16
  • 解读劳斯莱斯库里南 诠释顶级奢华旅行 2019-07-16
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  • 性格能预测寿命?4种性格有助长寿 2019-06-30
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  • 市委宣传部纪检组为扶贫提供坚强纪律保障 2019-06-18
  • 国际足联成员也就是亚足联成员的中国(大陆)、朝鲜、中华台北、香港、澳门,也可以有蒙古,可联合申办2038年世界杯。其中,中国大陆、朝鲜,算东道主,直接参赛。 2019-06-18
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