化学镀SiC/Ni-P功能梯度材料工艺、组织及性能

通过对化学镀Ｎｉ－ Ｐ－ ＳｉＣ复合镀层的研究，找到了制备ＳｉＣ／Ｎｉ－ Ｐ 功能梯度材料（ＦＧＭ） 的工艺方法。并采用光学显微镜、电子探针分析仪及热震试验等方法和手段对功能梯度材料的组织、形貌、成分与镀层结合力进行了研究。结果表明，功能梯度材料中ＳｉＣ微粒以弥散状态沿镀层厚度方向呈梯度分布，无团聚结块现象，材料致密，组织细小。功能梯度材料较单层Ｎｉ－ Ｐ－ ＳｉＣ复合镀层以及Ｎｉ－ Ｐ／Ｎｉ－ Ｐ－ ＳｉＣ 双层镀层具有更好的结合强度。

Technique and Microstructure and Property of SiC/Ni-P FGM by Electroless Plating

The special technology to form functionally gradient material (FGM) of SiC/Ni-P system has been explored from study of the Ni-P-SiC composite coating by electroless composite plating . The microstructure , appearance , composition and cohesive force of SiC/Ni-P FGM have been investigated by optical microscopy , electron probe microscopy analysis (EPMA) , thermal cycle experiment and so on. The experiment results show that SiC particles are fine and compact in the state of dispersion,and codeposition contents of SiC particles change gradually along the depth of coating. The cohesive strength of SiC/Ni-P FGM is much better than that of single Ni-P-SiC composite layer and the double layer material of Ni-P/Ni-P-SiC.