Study On Eddy Current Heating Effect And Deicing Of Nickel-coated Coatings In Civil Aircraft Composites

In order to solve the deicing problem of composite parts of civil aircraft,the eddy current heating effect and deicing performance of nickel-containing coatings on civil aircraft composites were studied.Nickel powder/epoxy resin composite was prepared by using nickel powder and epoxy resin respectively.Nickel powder/epoxy resin coating was prepared on the surface of carbon fiber composite by rotating coating instrument.The hard Ni-P alloy coating was prepared on the surface of carbon fiber composites by electroless plating.Firstly,the above samples were characterized and tested by SEM,FTIR,XRD,TG,bonding force and contact angle tester.The eddy current heating effect of the samples was studied by using self-made eddy current heating inductor.Finally,the magnetic inductance distribution of solenoid and the temperature distribution of nickel-plated carbon fiber composites were simulated by COMSOL Multiphysics,and the results were verified with the experimental results.The experimental results show that the nickel powder in the composite of nickel powder/epoxy resin and its coating is needle-like particle,and there is some agglomeration in the resin matrix,but there is no obvious aggregation phenomenon.There are many functional groups in the material,and there are strong absorption peaks at 672 cm^-1?824 cm^-1,and The sample has good thermal stability,and the mass loss of Ni/Ep-100%sample is only 0.8%when it is below 200?.The carbon fiber in the coating of carbon fiber composites?Ni-P?is uniformly coated with nickel ions with uniform distribution,and its conductivity increases with the increase of deposition amount,and the surface resistance of Ni/CFB-0.21 g sample is only 0.095?/?.The crystallinity of the sample can be increased by heat treatment.The strong diffraction peaks at 2?=41.78°and 2?=44.51°respectively indicate that Ni₅P₂,Ni and other crystalline phases are precipitated.At the same time,with the increase of deposition amount of Ni-P coating,the contact angle increased,the maximum hydrophobic angle of Ni/CF-0.14 g sample was 108.6°.The eddy current heating test shows that the above three samples have good eddy current heating effect at the induction frequency of 150 KHz.The content of nickel powder,the amount of Ni-P deposition and the input power of the sample affect the eddy current heating effect of the sample by influencing the magnetic conductivity and induced current,respectively.The Ni/CF-0.21 g sample has the maximum heating rate.When the input power is 134.75 w,the maximum equilibrium temperature can reach 286?within 5 min.The COMSOL Multiphysics simulation results show that the magnetic induction lines are mainly distributed in the inner part of the solenoid and concentrated in the region near the coil.The highest magnetic induction intensity is 7.6×10^-4 T in the X axis,and the lowest is close to 0 T.The temperature simulation analysis shows that the highest temperature distribution is at the center of the sample,and the simulation results are in agreement with the experimental results.The deicing rate of electroless nickel-coated carbon fiber composite is better than that of nickel powder/epoxy resin.The minimum melting time is 92 s,and the maximum melting rate is 0.022 g/s.The combination of experiment and simulation shows that it is feasible to fabricate nickel-containing coatings in civil aircraft composites and to have excellent eddy current heating effect and deicing ability.This technology has a certain potential application value.