电沉积纳米晶镍镀层微结构的调控及其对力学性能的影响  

Microstructure Regulation and Its Effect on the Mechanical Properties of Electro-Deposited Nanocrystalline Nickel Coatings

作　　者：乔俊强 虎学梅 QIAO Jun- qiang1,2, HU Xue-mei1,2(1. Gansu Natural Energy Research Institute, Lanzhou 730046, China; 2. Key Laboratory of Photovohaicin Gansu Province, Lanzhou 730046, China)

机构地区：[1]甘肃自然能源研究所,甘肃兰州730046 [2]甘肃省太阳能光伏重点实验室,甘肃兰州730046

出　　处：《材料保护》2018年第9期59-65,共7页Materials Protection

基　　金：甘肃省科技计划资助(18ZD2WA007;17YF1NA055);陇原青年创新创业人才项目(2016-28);甘肃省能源研究所科技计划资助(2018YF-04;2018QN-03);甘肃省科学院科技计划资助(2016JK-01;2014JK-01;2013QN-15)

摘　　要：电沉积金属镀层的微观结构对镀层性能有重要影响,而镀层微观结构与电沉积条件密切相关。通过电沉积法制备了具有择优取向的纳米晶镍镀层,研究了电流密度、电沉积时间、表面活性剂浓度、镀液温度等电沉积条件对镍镀层平均晶粒尺寸和晶面择优取向的影响,分析和讨论了镀层显微硬度随晶粒尺寸和晶面择优取向变化的机理。结果表明:纳米晶镍镀层的晶粒尺寸与晶面择优取向可通过改变电沉积条件进行调控,不同沉积条件下得到的纳米晶镍镀层平均晶粒尺寸在6~35 nm范围内,镍纳米晶择优取向主要在(111)和(200)晶面变化;晶粒尺寸和晶面择优取向共同影响纳米晶镍镀层的显微硬度。Nanocrystalline nickel coatings with preferred orientation were prepared by electrodeposition, and the effects of depositing parameters such as current density, electrodeposition time, surfactant concentration and solution temperature on the grain size and preferred orientation of the coatings were investigated. In addition, the influence mechanisms of grain size and preferred orientation on the micro hardness of the coatings were studied and discussed. Results show that the depositing parameters could significantly regulate the grain size and change the preferred orientation of the nanocrystalline nickel coatings. The average grain size of nanocrystal coating was in range of 6-35 nm, and the Ni nanocrystal exhibited a mixed preferred orientation with （111） and （200） crystal face. Besides, the grain size and the preferred orientation had a synergistic effect on the microhardness of the nanocrystalline nickel coatings.

关 键 词：电沉积条件 纳米晶镍 晶粒尺寸 择优取向 

分 类 号：TQ153.1[化学工程—电化学工业]