非晶纳米Ni-P/PTFE合金镀层的晶化动力学及耐蚀性能  

Crystallization kinetics and corrosion resistance of amorphous-nano Ni-P/PTFE alloy depositions

作　　者：李凝[1] 黄健萌[2] 马继杰[1] 曾平[1] 王华东[1] 

机构地区：[1]浙江师范大学工学院,金华321004 [2]福州大学机械工程学院,福州350108

出　　处：《粉末冶金材料科学与工程》2015年第2期244-249,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：清华大学摩擦学国家重点实验室开放基金资助项目(SKLTKF12B05);国家自然科学基金青年基金项目(51205062)

摘　　要：在化学镀Ni-P溶液中添加纳米聚四氟乙烯(PTFE)颗粒,沉积获得磷含量为9%(质量分数)的高磷NiP/PTFE合金镀层,以考察该合金的晶化动力学特性及其耐腐蚀性能。综合单晶X射线衍射及差热分析(DSC)的结果表明,获得的镀层结构为非晶态与纳米晶的混合结构,较非晶态合金的晶化活化能低。纳米PTFE颗粒的存在可能提高了该结构合金的晶化温度。热处理后的Ni-P/PTFE合金的耐腐蚀性能增强与其所形成的钝化膜有关。The Ni-P/PTFE alloy coating with 9%（mass fraction） of high phosphorus was prepared by adding polytetrafluoroethene （PTFE） particles into the electroless Ni-P solution, and the crystallization kinetics characteristics of the alloys and its corrosion resistance were researched. The X-ray diffraction and the differential thermal analysis （DSC） results show that the composite coating is a compound of amorphous and nanocrystalline. The crystallization activation energy decreases because of the nanocrystalline as the crystal core of the amorphous in heating process. The existence of the nano-PTFE particles can increase the crystallization temperature of the alloy. The improve of Ni-P/PTFE alloy corrosion resistance is related to the formation of passivation film after heat treatment.

关 键 词：非晶纳米晶 Ni-P/PTFE合金 晶化动力学 耐蚀性能 

分 类 号：TF125.241[冶金工程—粉末冶金]