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-thick Ni film was also electroplated on the Ni using the same electrolytic bath and the same parameters as those used for Ni-CeO2 nanocomposite coatings but without adding CeO2 nanoparticles. The surface...). The change in the morphology can be associated to the change from preferred orientation for Ni film to random orientation for Ni-CeO2 nanocomposite coatings, as seen from the XRD pattern in Fig. 3......
表面活性剂对Ni-SiC复合电镀的影响 舒霞1,黄新民1,张志明1,林志平1,单传丽1 (1.合肥工业大学,材料科学与工程学院,合肥,230009) 摘要:以瓦特型镀镍液为母液,在一定的工艺条件下复合电沉积Ni-SiC镀层,选用三种典型表面活性剂,即非离子型表面活性剂OP-10,阳离子型十六烷基三甲基溴化铵(CTAB),以及阴离子型十二烷基苯磺酸钠(LAS),通过对比实验,研究了它们对Ni-SiC复合电镀的影响,结果表明,LAS能显著改善镀层的表面质量,但对粒子复合量的贡献不大;OP-10能显著提高镀层的粒子复合量和硬度;CTAB能有效提高SiC颗粒的悬浮性能,促进SiC粒子与金属镍的共沉积. 关键词:表面活性剂; Ni-SiC复合镀层; 悬浮性能; [全文内容正在添加中] ......
SEM images of Ni-Co alloy coating(a) and NiCo-2.5%SiC nanocomposite coating(b) 2.3 纳米复合薄膜的耐腐蚀性和摩擦学性能 图4所示是NiCo合金镀层和NiCo-2.5%SiC纳米复合镀层在0.5mol/L HCl溶液中的Tafel 曲线. 可以看出, 复合镀层的腐蚀电位是-0.37V, 镍钴合金的腐蚀电... by electrodeposition[J]. Solid State Ionics, 2002, 151(1-4): 89-95. [7] Zimmerman A F, Clark D G , Aust K T, et al. Pulse electrodeposition of Ni-SiC nanocomposite[J]. Materials Letters, 2002, 52(1-2): 85-90. [8......
调制电流对电镀Ni-SiC复合膜性能的影响 王富山1,王江1,杜克勤1 (1.大连海得船机修造工程有限公司,) 摘要:研究了在调制电流作用下Ni-SiC复合镀膜的成分和性能,包括SiC沉积量,镀膜显微硬度,延展性和耐磨性等.通过控制电流密度以0.2/dm2@min速率从8 A/dm2连续衰减到2 A/dm2,可从瓦特液中获得比恒流电镀镀膜性能更优SiC梯度镀膜.当施加脉冲电流且脉冲幅值与基值比为8:2(A/dm2),占空比为1/6:10/6(min)时,镀膜耐磨性和显微硬度均最优. 关键词:电镀; 调制电流; Ni-SiC复合镀膜; 镀膜性能; [全文内容正在添加中] ......
Ni-SiC电结晶沉积层的阻抗谱及SiC颗粒对Ni沉积的影响 崔航1,谭澄宇1,胡炜1,刘宇1 (1.中南大学材料科学与工程学院,湖南,长沙,410083) 摘要:前期研究发现,SiC颗粒在阴极有利于Ni结晶形核,为此研究了在电位-250~-1050 mV(vs SCE)下,Ni-SiC复合体系电沉积阻抗谱特征,利用扫描电镜(附能谱仪)观察了Ni-SiC体系复合沉积初期的表面形貌.结果表明:Ni-SiC体系Nyquist谱主要表现为一个压扁的容抗半圆,随着电位负移,Ni-SiC沉积的电化学阻抗值基本呈下降趋势.在电位-750~-1050 mV,Nyquist谱低频段还伴随一个感抗弧,Ni-SiC沉积的阻抗显著减小,反映Ni在铜基体上开始电结晶形核/生长;在低过电位(-250~-650 mV)下,Sic颗粒明显降低了Ni-Sic体系Ni沉积还原反应的电荷转移电阻;分析认为:Sic微粒......
the nanocomposite film as the charge generation layer (CGL) was designed and fabricated. It is found that the photoreceptor based on Ppy/TiO2 nanotubes as CGL exhibits remarkable photoconductive... optoelectronics field. With these considerations, we reported the fabrication of nanocomposite film of polypyrrole (Ppy) and TiO2 nanotube (TNT) arrays via electrochemical methods. A novel dual-layered......
transition and cyclic voltammetric properties of RuO2·nH2O film LIU Hong, GAN Wei-ping, GUO Gui-quan, LIU Ji-yu, LI Xiang, ZHENG Feng (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: As a good electrode material for supercapacitor, RuO2·nH2O film was deposited on tantalum foils in aqueous solution of RuCl3·3H2O by galvanostatic......
Microstructure and magnetic properties of directly quenched Nd2Fe14B/α-Fe nanocomposite materials at different temperaturesSHENG Hong-chao(盛洪超)1, 2, 3, ZENG Xie-rong(曾夑榕)1, 2, 3, JIN Chao-xiang(靳朝相... nanocomposite permanent magnets were prepared under different melt treatment conditions, i.e., the melt temperature was varied prior to ejection onto the quenching wheel. The effect of quenching temperature......
; 文章编号:1672-7207(2014)06-1784-06 Preparation and characterization of Ag/polyaniline nanocomposite LI Zhihua, LI Junjie, LIN Wei (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: Silver/polyaniline(Ag/PANI) nanocomposite was successfully prepared within the micro-emulsion system of reverse micelle under ultraviolet......
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