Preparation, characterization and microwave absorption properties of electroless Ni–Co–P-coated SiC powder
Preparation, characterization and microwave absorption properties of electroless Ni–Co–P-coated SiC powder
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DOI：
10.1016/j.apsusc.2008.01.076
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发表时间：
2008-05
影响因子：
6.7
通讯作者：
Yongjie Li;Rui Wang;Fengming Qi;Chunming Wang
中科院分区：
文献类型：
--
作者：
Yongjie Li;Rui Wang;Fengming Qi;Chunming Wang
采用两步化学镀工艺(敏化前处理和后续电镀)制备了用于轻质吸波材料的碳化硅颗粒增强镍-钴-磷基复合涂层，并用扫描电子显微镜、X射线衍射仪、振动样品磁强计和矢量网络分析仪对其进行了表征。结果表明，Ni-Co-P镀层为α-Co和Ni3P的均匀混晶，具有较低的比饱和磁化强度和较低的矫直力。由于Ni-Co薄膜的导电性和铁磁性，在微波频率下可以获得较高的介电常数和磁损耗。当镀液中Ni-Co原子比为1.5时，当镀液中Ni-Co原子比为1.5时，当频率为6.30 GHz，厚度为2.5 mm时，复合粉末的微波损耗最大小于−32dB。
Silicon carbide particles reinforced nickel–cobalt–phosphorus matrix composite coatings were prepared by two-step electroless plating process (pre-treatment of sensitizing and subsequent plating) for the application to lightweight microwave absorbers, which were characterized by scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), vibrating sample magnetometer (VSM) and vector network analyzer, respectively. The results show that Ni–Co–P deposits are uniform and mixture crystalline of α-Co and Ni3P and exhibit low-specific saturation magnetization and low coercivity. Due to the conductive and ferromagnetic behavior of the Ni–Co thin films, high dielectric constant and magnetic loss can be obtained in the microwave frequencies. The maximum microwave loss of the composite powder less than −32dB was found at the frequency of 6.30GHz with a thickness of 2.5mm when the initial atomic ratio of Ni–Co in the plating bath is 1.5.