直流电沉积法制备纳米晶体镍镀层及其热稳定性研究（英文）  

Synthesis and Thermal Stability of Nanocrystalline Nickel Coatings by Direct Current Electrodeposition

作　　者：董楠[1] 张彩丽[1] 李娟[1] 韩培德[1] 

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《稀有金属材料与工程》2016年第4期885-888,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51371123);Research Fund for the Doctoral Program of Higher Education of China(20131402110003);the Natural Science Foundation of Shanxi Province(2014011002);Graduate Science and Technology Innovation Fund of Shanxi Province(20133043)

摘　　要：利用直流电沉积技术系统分析电流密度和镀液糖精浓度对纳米晶体镍性能的影响。结果表明,电流密度在0.5~1.5 A/dm^2时,可调节糖精浓度制备出显微硬度HV分布为415~603 MPa的纳米晶镀层。小电流密度0.5 A/dm^2时,随糖精浓度增大,镀层(200)面衍射强度增强,结构由(111),(200)双织构向(200)面转变,且镀层内应力降低,糖精浓度增大到1.2 g/L时,内应力降为0。镀层晶粒尺寸为28~98 nm时,直到600℃晶粒才开始长大,结构稳定性较好;晶粒尺寸为10 nm时,晶粒在317℃异常长大,其结构稳定性显著下降。The influences of current density and saccharin concentration on nanocrystalline nickel coatings synthesized by direct current electrodeposition were analyzed. Results show that in the current density range from 0.5 A/dm^2 to 1.5 A/dm^2, nanocrystalline nickel coatings with broad microhardness HV distribution from 4150 MPa to 6030 MPa can be synthesized by adjusting saccharin concentration. The preferred orientation in the deposits exists at 0.5 A/dm^2,（111）,（200） double orientation texture changes to a（200） orientation texture as saccharin concentration and（200） intensity increase. The internal stresses of the samples prepared at 0.5 A/dm-2 decrease to nearly 0 MPa as saccharin concentration increases to 1.2 g/L. The results of DSC curves show that the grains start to grow until 600 ℃ and keep the thermal stability near to bulk nickel when grain sizes are in the range from 28 nm to 98 nm. However, when the grain size is 10 nm, the grains grow abnormally at 317 ℃, and their thermal stability decrease sharply.

关 键 词：纳米晶体镍 电沉积 显微硬度 热稳定性 

分 类 号：O614.813[理学—无机化学] TB383.1[理学—化学]