电沉积Ni-P非晶纳米SiC复合镀层的工艺研究  

Electroplating Technology for Amorphous Ni-P/Nano-SiC Composite Coating

作　　者：王玉[1] 郭金彪[1] 何建英[1] 李磊[1] 李辉勤[1] 孙冬柏[1] 

机构地区：[1]北京科技大学腐蚀与防护中心,北京100083

出　　处：《材料保护》2005年第12期23-25,共3页Materials Protection

基　　金：北京市教委科技发展计划重点项目(KZ200410028012)

摘　　要：为了提高非晶镀层的硬度,在N i-P镀液中加入高硬度、高耐磨性的纳米微粒SiC,采用电沉积方法制备了N i-P非晶纳米SiC复合镀层。研究了工艺温度、电流密度和镀液中SiC浓度对非晶纳米复合镀层中P含量和SiC纳米颗粒分布的影响,并用扫描电镜对镀层表面进行了观察,通过纳米显微力学探针测量了镀层硬度。结果表明:随电流密度增大和镀液中SiC含量的增加,镀层中纳米SiC的复合量增加;镀液温度在60℃时,镀层中SiC含量最大,复合镀层的硬度显著提高,可达到7.4 GPa,比普通的N i-P非晶镀层大为提高。Hard and wear-resistant nanoparticles of SiC were introduced in the electroplating bath for amorphous Ni-P coating so as to prepare Ni-P/nanoSiC composite coating.The influences of the technological parameters such as bath temperature,current density,and SiC concentration in the plating bath on the P content and distribution of nano-SiC in the composite coating were investigated.The morphologies of the composite coatings were observed using a scanning electron microscope,while the hardness of the coatings was determined using a nano-microhardness instrument.It was found that the content of nano-SiC in the composite coating increased with increasing electric current and the concentration of SiC in the plating bath.Moreover,the incorporation of nano-SiC contributed to greatly increase the hardness of the Ni-P coating prepared at a bath temperature of 60 ℃,with the maximum hardness of the Ni-PSiC composite coating to be as much as 7.4 GPa,which is much larger than that of the amorphous Ni-P coating.

关 键 词：电沉积 Ni-P非晶 纳米SiC复合镀层 工艺研究 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TB383.1[金属学及工艺—金属学]