纳米TiC颗粒对Ni-TiC复合镀层组织与性能的影响

doi:10.11868/j.issn.1001-4381.2014.001571

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摘要

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/cm²，为微米复合镀层的0.5倍。

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	王红星
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关键词 ： Ni-TiC复合镀层, 微-纳米TiC, 耐磨性能, 抗氧化性能

Abstract：

Ni based composite coatings containing micro-and nano-TiC particles were prepared by dipulse 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 investigated.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 firstly increases and then decreases with increasing the content of nano-TiC in bath; however, the friction coefficient of coatings firstly decreases and then increases, the maximum value of microhardness of coating with 445HV is achieved when containing 6.0g/L nano-TiC in bath, at the same time, the smaller friction coefficient of coating is about 0.22.The wear mechanism is mainly abrasive wear.Coatings under the oxidation condition at 900℃ for 100h show the best oxidation resistance which the mass gain with 6.828mg/cm² is 1/2 of that of micro-TiC composite coating.

Key words： Ni-TiC composite coating micro-and nano-TiC wear resistance oxidation resistance

收稿日期: 2014-12-31 出版日期: 2017-01-19

中图分类号:

TG174.44

基金资助:国家自然科学基金青年科学基金项目(51301086);南京工程学院大学生科创项目(N20150217);南京工程学院大学生科创项目(201411276024Y)

通讯作者: 王红星 E-mail: wanghx@njit.edu.cn

作者简介: 王红星(1971-), 男, 博士, 副教授, 主要从事复合材料制备及性能研究, 联系地址:江苏省南京市江宁区弘景大道1号南京工程学院材料工程学院(211167), E-mail:wanghx@njit.edu.cn

引用本文:

王红星, 毛向阳, 沈彤, 张月. 纳米TiC颗粒对Ni-TiC复合镀层组织与性能的影响[J]. 材料工程, 2017, 45(1): 52-57.
Hong-xing WANG, Xiang-yang MAO, Tong SHEN, Yue ZHANG. Effect of Nano-TiC Particles on Microstructure and Properties of Ni-TiC Composite Coatings. Journal of Materials Engineering, 2017, 45(1): 52-57.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2014.001571 或 http://jme.biam.ac.cn/CN/Y2017/V45/I1/52

Fig.1 镀液中添加不同纳米TiC含量时Ni-TiC复合镀层的SEM形貌
(a)0 g/L；(b)2.0 g/L；(c)6.0 g/L；(d)8.0 g/L；(e)10.0 g/L

Fig.2 不同纳米TiC添加量时Ni-TiC复合镀层的XRD图谱

Fig.3 镀液中纳米TiC添加量与复合镀层显微硬度的关系

Fig.4 摩擦因数随时间变化的曲线

Fig.5 不同纳米TiC添加量时复合镀层磨痕SEM形貌
(a)0 g/L；(b)2.0 g/L；(c)6.0 g/L；(d)8.0 g/L；(e)10.0 g/L

Fig.6 Ni-TiC复合镀层在900℃, 100h氧化动力学曲线

Fig.7 不同纳米TiC添加量时复合镀层氧化SEM形貌
(a)0 g/L；(b)2.0 g/L；(c)6.0 g/L；(d)8.0 g/L；(e)10.0 g/L

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