钨酸钠对Ti-Ni合金Ni-W-P化学镀层组织性能的影响  

Effect of Na2WO4 concentration on microstructure and properties of Ni-W-P electroless plating deposited on Ti-Ni alloys

作　　者：刘爱莲 赵霞 徐家文 仇兆忠 Liu Ailian;Zhao Xia;Xu Jiawen;Qiu Zhaozhong(School of Materials Science & Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China)

机构地区：[1]黑龙江科技大学材料科学与工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2020年第6期659-663,共5页Journal of Heilongjiang University of Science And Technology

基　　金：中国博士后科学基金面上项目(2018M641809)。

摘　　要：为提高钛镍合金的耐磨性能,在其表面制备Ni-W-P化学镀层。利用XRD、SEM、EDS、摩擦磨损试验机研究镀液中钨酸钠的质量浓度对Ni-W-P镀层的微观形貌、物相组成及成分和耐磨性的影响。结果表明:Ti-Ni合金表面Ni-W-P镀层晶态镀层为排列致密的胞状结构,镀层主要由Ni3P相和Ni相组成,镀层与基体间有明显的界面,与基体结合良好;Ni-W-P镀层的显微硬度约为Ti-Ni合金的2倍;Ni-W-P化学镀显著提高了Ti-Ni合金的耐磨性,随着Na2WO4质量浓度的增加,Ni-W-P镀层的磨损失重量先降低后增加,当Na2WO4质量浓度为30 g/L时,镀层的磨损失重最少,约为Ti-Ni基体的1/2。镀层的磨损机制主要是磨粒磨损。This paper intends to improve the wear resistance of Ti Ni alloy.The study involves preparing Ni-W-P electroless coating on the surface of Ti-Ni alloy;using X-ray diffraction(XRD),Scanning electron microscope(SEM)and friction wear testing machine to investigate the effect of mass concentration of sodium tungstate in plating solution on the microstructure,phase composition,composition and wear resistance of Ni-W-P coating.The results show that the crystalline Ni-W-P coating on the surface of Ti-Ni alloy is of a compact cellular structure and,consists mainly of Ni3P phase and Ni phase,exhibiting an obvious boundary between the Ti-Ni matrix and Ni-W-P plating,and a better combination with the matrix;Ni-W-P coating has about 2 times the microhardness of Ti-Ni alloy;the electroless Ni-W-P plating enables an improved wear resistance of Ti-Ni alloys;along with an increase in the concentration of Na2WO4 solution comes an initial decrease and subsequent increase in the wear loss of the plating;and the presence of the concentration of Na2WO4 solution of 30 g/L means the minimum value in the wear loss,about one half of that of Ti-Ni alloys,suggesting that the Ni-W-P plating has the wear mechanism mainly in the form of abrasive wear.

关 键 词：TI-NI合金 化学镀 显微组织 耐磨性 

分 类 号：TG139.6[一般工业技术—材料科学与工程]