Ni-W-P coatings were deposited on the surface of glass fibers by the electroless plating process. The bath was very stable through the palladium salt test. There was no phenomenon of peeling and blistering on the surf...Ni-W-P coatings were deposited on the surface of glass fibers by the electroless plating process. The bath was very stable through the palladium salt test. There was no phenomenon of peeling and blistering on the surface of the Ni-W-P alloy glass fibers in the thermal shock test. It showed that the deposit had high impact strength and good adhesion. The morphology of the coatings was observed by scanning electron microscope （SEM）. The elements and their contents were tested and analyzed by energy dispersion spectrometer （EDS）. The tungsten content reached up to 12.1 wt.%. The effects of the concentrations of NiSO4, Na2WO4, and NaH2PO2.H20 on the conductivity of the coatings were studied. The resistivity of the Ni-W-P alloy glass fibers reached 7.39 × 10^-3 Ωcm. The alloy coatings on glass fibers were analyzed by XRD. The results indicated that the deposit had an amorphous structure and good heat stability. The suitable work temperature range was lower than 190℃. Finally, the electromagnetic parameters of the Ni-W-P alloy glass fibers were tested and analyzed primarily. The magnetic loss reached 0.04023 and the dielectric loss reached -5.80239. The plated alloy is a kind of soft magnetic material.展开更多
Carbon fibers（CFs） were coated with a nickel-phosphorus（Ni-P） film using an electroless plating process. The morphology, elemental composition and phases in the coating layer of the CFs were investigated by scanni...Carbon fibers（CFs） were coated with a nickel-phosphorus（Ni-P） film using an electroless plating process. The morphology, elemental composition and phases in the coating layer of the CFs were investigated by scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS） and X-ray diffraction（XRD）, respectively. Wet paper-making method was used to prepare nickle coated carbon fiber paper（NCFP）. Vacuum assisted infusion molding process（VAIMP） was employed to manufacture the NCFP reinforced epoxy composites, and carbon fiber paper（CFP） reinforced epoxy composites were also produced as a comparison. Electromagnetic interference（EMI） shielding properties of the composites were measured in the 3.22-4.9 GHz frequency range using waveguide method. Both NCFP and CFP reinforced epoxy composites of 0.5 mm thickness exhibited high EMI shielding effectiveness（SE） at 8wt% fiber content, 35 d B and 30 d B, respectively, and reflection was the dominant shielding mechanism.展开更多
通过化学镀方法在玻璃纤维表面沉积了Ni Fe P合金,所用镀液经钯盐法测试稳定性很好,所得镀合金玻璃纤维热震实验后表面无鼓泡、起皮现象,说明镀层的抗冲击强度高,结合力良好。并利用扫描电镜观察分析了镀层的表面形貌,同时使用 X射线能...通过化学镀方法在玻璃纤维表面沉积了Ni Fe P合金,所用镀液经钯盐法测试稳定性很好,所得镀合金玻璃纤维热震实验后表面无鼓泡、起皮现象,说明镀层的抗冲击强度高,结合力良好。并利用扫描电镜观察分析了镀层的表面形貌,同时使用 X射线能谱仪对镀层成分含量进行了测定分析,铁的质量百分含量最大可达 21.8%,并得出了镍含量、铁含量对镀层导电性能的影响情况,制备的镀合金玻璃纤维电阻率可为7.32×10-4Ω·cm。最后还对所得 Ni Fe P合金玻璃纤维的电磁参数进行了初步的测定分析,所得镀金属玻璃纤维的磁损耗为0.307;介电损耗为1.44。展开更多
基金The project was financially supported by The Space Foundation of Supporting-Technology of China (No. 2002EK1803)the Graduate Starting Seed Fund of Northwestern Polytechnical University (No. W016663)
文摘Ni-W-P coatings were deposited on the surface of glass fibers by the electroless plating process. The bath was very stable through the palladium salt test. There was no phenomenon of peeling and blistering on the surface of the Ni-W-P alloy glass fibers in the thermal shock test. It showed that the deposit had high impact strength and good adhesion. The morphology of the coatings was observed by scanning electron microscope （SEM）. The elements and their contents were tested and analyzed by energy dispersion spectrometer （EDS）. The tungsten content reached up to 12.1 wt.%. The effects of the concentrations of NiSO4, Na2WO4, and NaH2PO2.H20 on the conductivity of the coatings were studied. The resistivity of the Ni-W-P alloy glass fibers reached 7.39 × 10^-3 Ωcm. The alloy coatings on glass fibers were analyzed by XRD. The results indicated that the deposit had an amorphous structure and good heat stability. The suitable work temperature range was lower than 190℃. Finally, the electromagnetic parameters of the Ni-W-P alloy glass fibers were tested and analyzed primarily. The magnetic loss reached 0.04023 and the dielectric loss reached -5.80239. The plated alloy is a kind of soft magnetic material.
基金Funded by the National Natural Science Foundation of China(No.51373129)
文摘Carbon fibers（CFs） were coated with a nickel-phosphorus（Ni-P） film using an electroless plating process. The morphology, elemental composition and phases in the coating layer of the CFs were investigated by scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS） and X-ray diffraction（XRD）, respectively. Wet paper-making method was used to prepare nickle coated carbon fiber paper（NCFP）. Vacuum assisted infusion molding process（VAIMP） was employed to manufacture the NCFP reinforced epoxy composites, and carbon fiber paper（CFP） reinforced epoxy composites were also produced as a comparison. Electromagnetic interference（EMI） shielding properties of the composites were measured in the 3.22-4.9 GHz frequency range using waveguide method. Both NCFP and CFP reinforced epoxy composites of 0.5 mm thickness exhibited high EMI shielding effectiveness（SE） at 8wt% fiber content, 35 d B and 30 d B, respectively, and reflection was the dominant shielding mechanism.
文摘通过化学镀方法在玻璃纤维表面沉积了Ni Fe P合金,所用镀液经钯盐法测试稳定性很好,所得镀合金玻璃纤维热震实验后表面无鼓泡、起皮现象,说明镀层的抗冲击强度高,结合力良好。并利用扫描电镜观察分析了镀层的表面形貌,同时使用 X射线能谱仪对镀层成分含量进行了测定分析,铁的质量百分含量最大可达 21.8%,并得出了镍含量、铁含量对镀层导电性能的影响情况,制备的镀合金玻璃纤维电阻率可为7.32×10-4Ω·cm。最后还对所得 Ni Fe P合金玻璃纤维的电磁参数进行了初步的测定分析,所得镀金属玻璃纤维的磁损耗为0.307;介电损耗为1.44。
