The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in general state as well as in magnetic field were studied using potentiometer, plasma emission spectrome...The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in general state as well as in magnetic field were studied using potentiometer, plasma emission spectrometer, X-ray diffractometer, transmission electron microscope. The results show that the static potential and polarizability of electroless Co-Ni-B alloy are remarkably improved as the plating is carried out in magnetic field in the presence of a little amount of cerium in plating bath. Because of the action of magnetic field and rare earth element cerium, the boron content in alloy decreases, while cobalt and nickel contents increase. As a result, the amorphous Co-Ni-B alloy transforms to the microcrystalline Co-Ni-B-Ce alloy when the plating is in general state, and the Co-Ni-B alloy makes a crystalline transformation because of the action of magnetic field and rare earth element cerium.展开更多
The effects of rare earth element cerium on composition and electrochemical characteristics of electroless Co-Ni-B alloy were studied in this paper. The alloy component was analyzed using Inductively Coupled Plasma (I...The effects of rare earth element cerium on composition and electrochemical characteristics of electroless Co-Ni-B alloy were studied in this paper. The alloy component was analyzed using Inductively Coupled Plasma (ICP) . The plating rate is was determined by electronic balance. The cathode polarization curves and cyclic voltammogram during the electroless deposition were tested by LK998 Ⅱ model electrochemical analytical system. The results show that rare earth element Ce can co-deposit with cobalt-based alloy, and with mass increase of Ce added in aqueous solution, the contents of Co, Ni, Ce in alloy increase and the content of B decreases. Ce can increase deposition rate of alloy in some range. The rare earth makes deposition potential move to positive direction and makes polarizability decrease.展开更多
利用恒电位仪、等离子发射光谱仪、电子能谱仪、X射线衍射仪、透射电子显微镜等研究了在常态和磁场条件下化学镀Co Ni B Ce合金的电化学性质、化学组成和组织结构。结果表明 ,微量稀土和磁场的介入改善了化学镀Co Ni B合金的静止电位和...利用恒电位仪、等离子发射光谱仪、电子能谱仪、X射线衍射仪、透射电子显微镜等研究了在常态和磁场条件下化学镀Co Ni B Ce合金的电化学性质、化学组成和组织结构。结果表明 ,微量稀土和磁场的介入改善了化学镀Co Ni B合金的静止电位和极化度 ;随镀液里稀土金属Ce量的增加 ,化学镀Co Ni B Ce合金镀层中的Ce含量是先增加后下降 ,均在Ce的质量浓度为 0 8g/L时达到最大值。在磁场和稀土铈的作用下 ,化学镀Co Ni B Ce合金镀层中B的含量减少 ,Co和Ni的含量增加 ,因而在常态下非晶态的Co Ni B镀层转变成了微晶结构的Co Ni B Ce镀层 ,在磁场条件下含稀土Ce的镀层则发生了晶化转变。展开更多
研究了磁场条件下化学镀Co- Ni- B -Ce合金镀层的微观表面形貌、显微硬度和磨损体积。结果表明,化学镀Co- Ni -B合金镀层表面由“圆锥峰”构成,表面较为平整,添加稀土Ce后,镀层变得凹凸不平;在外加磁场下施镀,镀层表面起伏更大。镀液... 研究了磁场条件下化学镀Co- Ni- B -Ce合金镀层的微观表面形貌、显微硬度和磨损体积。结果表明,化学镀Co- Ni -B合金镀层表面由“圆锥峰”构成,表面较为平整,添加稀土Ce后,镀层变得凹凸不平;在外加磁场下施镀,镀层表面起伏更大。镀液里添加Ce以及在磁场条件下,明显地提高了Co -Ni -B合金镀层的显微硬度和耐磨性,随镀液中Ce添加量增加,合金镀层的硬度和耐磨性都是先增加后降低,当镀液里Ce的添加量为0. 8g/L时,硬度和耐磨性均达到了峰值。展开更多
基金Project(50371023) supported by the National Natural Science Foundation of China
文摘The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in general state as well as in magnetic field were studied using potentiometer, plasma emission spectrometer, X-ray diffractometer, transmission electron microscope. The results show that the static potential and polarizability of electroless Co-Ni-B alloy are remarkably improved as the plating is carried out in magnetic field in the presence of a little amount of cerium in plating bath. Because of the action of magnetic field and rare earth element cerium, the boron content in alloy decreases, while cobalt and nickel contents increase. As a result, the amorphous Co-Ni-B alloy transforms to the microcrystalline Co-Ni-B-Ce alloy when the plating is in general state, and the Co-Ni-B alloy makes a crystalline transformation because of the action of magnetic field and rare earth element cerium.
基金Project supported by the National Natural Science Fund Aiding Object of China (50371023)
文摘The effects of rare earth element cerium on composition and electrochemical characteristics of electroless Co-Ni-B alloy were studied in this paper. The alloy component was analyzed using Inductively Coupled Plasma (ICP) . The plating rate is was determined by electronic balance. The cathode polarization curves and cyclic voltammogram during the electroless deposition were tested by LK998 Ⅱ model electrochemical analytical system. The results show that rare earth element Ce can co-deposit with cobalt-based alloy, and with mass increase of Ce added in aqueous solution, the contents of Co, Ni, Ce in alloy increase and the content of B decreases. Ce can increase deposition rate of alloy in some range. The rare earth makes deposition potential move to positive direction and makes polarizability decrease.
文摘利用恒电位仪、等离子发射光谱仪、电子能谱仪、X射线衍射仪、透射电子显微镜等研究了在常态和磁场条件下化学镀Co Ni B Ce合金的电化学性质、化学组成和组织结构。结果表明 ,微量稀土和磁场的介入改善了化学镀Co Ni B合金的静止电位和极化度 ;随镀液里稀土金属Ce量的增加 ,化学镀Co Ni B Ce合金镀层中的Ce含量是先增加后下降 ,均在Ce的质量浓度为 0 8g/L时达到最大值。在磁场和稀土铈的作用下 ,化学镀Co Ni B Ce合金镀层中B的含量减少 ,Co和Ni的含量增加 ,因而在常态下非晶态的Co Ni B镀层转变成了微晶结构的Co Ni B Ce镀层 ,在磁场条件下含稀土Ce的镀层则发生了晶化转变。
文摘 研究了磁场条件下化学镀Co- Ni- B -Ce合金镀层的微观表面形貌、显微硬度和磨损体积。结果表明,化学镀Co- Ni -B合金镀层表面由“圆锥峰”构成,表面较为平整,添加稀土Ce后,镀层变得凹凸不平;在外加磁场下施镀,镀层表面起伏更大。镀液里添加Ce以及在磁场条件下,明显地提高了Co -Ni -B合金镀层的显微硬度和耐磨性,随镀液中Ce添加量增加,合金镀层的硬度和耐磨性都是先增加后降低,当镀液里Ce的添加量为0. 8g/L时,硬度和耐磨性均达到了峰值。
