纳米TiC颗粒对Ni-TiC复合镀层组织与性能的影响

采用双脉冲复合电镀技术,在瓦特型镀液中,制备含微-纳米TiC颗粒的Ni基复合镀层。研究镀液中纳米TiC添加量对复合镀层微观形貌、组织结构、硬度、摩擦和抗氧化性能的影响。结果表明：镀液中添加纳米TiC后,Ni-TiC复合镀层表面出现团聚、致密度降低,复合镀层的组织为Ni和TiC;随镀液中纳米TiC添加量的增加,复合镀层的显微硬度呈先增后降的趋势,而摩擦因数则先降后升;当纳米TiC颗粒添加量为6.0g/L时,复合镀层显微硬度最大,为445HV,摩擦因数较小,为0.22,磨损机制以磨料磨损为主;在900℃,100h氧化条件下抗氧化性能最佳,氧化增重为6.828mg/cm-2,为微米复合镀层的0.5倍...

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Bibliographic Details
Published in材料工程 Vol. 45; no. 1; pp. 52 - 57
Main Author 王红星 毛向阳 沈彤 张月
Format Journal Article
LanguageChinese
Published 江苏省先进结构材料与应用技术重点实验室,南京211167 2017
南京工程学院材料工程学院,南京211167
Subjects
Ni-TiC复合镀层
微-纳米TiC
抗氧化性能
耐磨性能
Ni-TiC复合镀层
抗氧化性能
Ni-TiC composite coating
耐磨性能
micro-and nano-TiC
wear resistance
微-纳米TiC
oxidation resistance
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Summary:采用双脉冲复合电镀技术,在瓦特型镀液中,制备含微-纳米TiC颗粒的Ni基复合镀层。研究镀液中纳米TiC添加量对复合镀层微观形貌、组织结构、硬度、摩擦和抗氧化性能的影响。结果表明：镀液中添加纳米TiC后,Ni-TiC复合镀层表面出现团聚、致密度降低,复合镀层的组织为Ni和TiC;随镀液中纳米TiC添加量的增加,复合镀层的显微硬度呈先增后降的趋势,而摩擦因数则先降后升;当纳米TiC颗粒添加量为6.0g/L时,复合镀层显微硬度最大,为445HV,摩擦因数较小,为0.22,磨损机制以磨料磨损为主;在900℃,100h氧化条件下抗氧化性能最佳,氧化增重为6.828mg/cm-2,为微米复合镀层的0.5倍。
Bibliography:11-1800/TB
WANG Hong-xing1,2 ,MAO Xiang-yang1,2 , SHEN Tong1,2 ,ZHANG Yue1,2 （1. Key Laboratory of Advanced Structural Materials and Application Technology of Jiangsu Province, Nanjing 211167 , China; 2. School of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, China）
Ni based composite coatings containing micro- and nano-TiC particles were prepared by di-pulse electrodepositing in Watt＇s nickel solution. The effect of nano-TiC content in the solution on the micro morphology, microstructure, hardness and wear resistance of composite coatings was investiga-ted. The results show that the agglomeration of composite coatings of Ni-TiC appears and the density decreases by adding nano-TiC particles in electrolyte, the microstructure of coatings consists of Ni and TiC phase; the hardness of composite coatings f irs t ly increases and then decreases with increasing the content of nano-TiC in bath; however, the friction coefficient of coatings firstly decreases and then in-creases ,the maximum va
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2014.001571