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SRIDHARAN等[11]研究了影响电沉积Ni-Fe-P力学性能的因素.王玲玲等[12]研究了以酒石酸盐为络合剂的镀液体系中化学镀Ni-Fe-P. 化学镀是获得非晶态合金的重要手段,而非晶态属亚稳态结构,对其进行热处理将导致其结构和性能发生改变.WANG等[13-14]采用硼酸为缓冲剂,柠檬酸钠为络合剂,在弱碱性体系中化学沉积Ni-Fe-P合金膜,较系统研究沉积条件对镀层沉积速率和结构的影响,还重点研究... of coating deposited from different bath pH values: (a) pH 7.0; (b) pH 7.5; (c) pH 7.7; (d) pH 8.1 从镀层元素含量分析可知,该镀层属高磷合金,一般应呈非晶或微晶态结构.图4所示为不同镀液pH值所得镀层的XRD谱.图中在2θ为40?~55?时有一个较宽的漫散射衍射峰,表明镀层为非晶态结构;2θ为45?,65......
均匀的泡沫镍,镍片及泡沫镍的镍含量均大于99.5%.电镀液的基本组成为瓦特浴体系:硫酸镍60~160 g/L,硫脲10~120 g/L,硼酸10~60 g/L,氯化钠5~40 g/L,氧化镨(粒径小于74 μm)0.5 g/L,氧化铒(粒径小于74 μm) 0.5 g/L,添加剂和表面活性剂适量;电沉积采用双阳极单阴极,温度为45 ℃,电流密度为30 mA/cm2,pH值为4.0~4.3,沉积时间...较低能够择优生长,进而形成粗糙表面. 图5 泡沫镍基Ni-S镀层的SEM微观结构 Fig.5 SEM micrographs of nickel sulphur coatings on foam nickel substrates with (a) and without Pr2O3 (b) 对上述镀层的EDX能谱进行分析,结果表明,加入稀土氧化物Pr2O3后镀层......
of Nonferrous Metals, 1999, 9(2): 378-380. [11] HOSHINO H, IWASE M. Chemical potentials of components of the system CaO+P2O5+FeO at 1 673 K[J]. Metallurgical and Materials Transaction B, 1996, 27B(8): 595-603......
leach and Its application to process control and optimization[J]. Hydrometallurgy, 1992, 29(1/3): 357-381. [5] Grewal I, Dreisinger D B, Krueger D, Muir D M. Total oxidation leaching of Cu2S......
Chemistry-An Introduction Emphasizing Chemical Equilibria in Natural Waters [M]. TANG Hong-xiao, tranls. Beijing: Science Press, 1987. [11] Trojanowicz M, Alexander P W, Hibbert D B. Flow-injection......
焊接条件下的熔化区截面形状相符.温度场模拟结果与实验结果吻合良好. 图5 温度场数值模拟与实验结果对比 Fig.5 Comparison of numerical simulation results(a) with experimental results(b) of temperature field 图6所示为距焊缝中心5 mm处试板底部的热循环变化曲线,数......
Sedimentation curves of magnetic chitosan-5-fluorouracil nano-particles: (a) In absence of magnetic field; (b) In the presence of 8 mT magnetic field As shown in Fig.4, without external magnetic field.... Chitosan-coated magnetic nanoparticles as carriers of 5-fluorouracil: Preparation, characterization and cytotoxicity studies [J]. Colloids and Surfaces B: Biointerfaces, 2009, 68(1): 1-6. [5] CREGG P J......
小,膜层的耐蚀性得到提高. 图6 Ca(NO3)2浓度对膜层形貌的影响 Fig.6 Influence of concentration of Ca(NO3)2 on coating morphology: (a) 0 g/L; (b) 2 g/L , (c) 5 g/L; (d) 7g/L 2.4 膜层的成分及存在形式 图7所示为Ca(NO3)2浓......
, 2008, 320(1/2): 520-527. [14] RAMACHANDRA R B, NEELA P D, RAJESH K J. Solvent extraction of cadmium(Ⅱ) from sulphate solutions using TOPS 99, PC 88A, Cyanex 272 and their mixtures [J......
, 4(3): 319-327. [13] HE X X, WANG K M, TAN W H, LIU B, LIN X, HE C M, LI D, HUANG S S, LI J. Bioconjugated nanoparticles for DNA protection from cleavage [J]. J Am Chem Soc, 2003, 125(24): 7168-7169......