Effect of Phosphorus Content of the Magnetic and Electric Properties of Electroless Ni–P Film after Heat Treatment

Osaka, Tetsuya; Usuda, Masahiko; Koiwa, Ichiro; Sawai, Hideo

doi:10.1143/jjap.27.1885

Cited by 38 publications

(19 citation statements)

References 26 publications

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“…The phosphorus content in the coating layers can be controlled by the deposition parameters, such as pH value, bath composition, etc. [9][10][11][12]. The phase of coating layer with low phosphorus is microcrystalline, which is consistent with the results of Marshall et al [13] and Mai [14].…”

Section: Resultssupporting

confidence: 85%

Preparation and study on radar absorbing materials of nickel-coated carbon fiber and flake graphite

Fan

Yang

Liu

et al. 2008

Journal of Alloys and Compounds

100

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Section: Resultssupporting

confidence: 85%

Preparation and study on radar absorbing materials of nickel-coated carbon fiber and flake graphite

Fan

Yang

Liu

et al. 2008

Journal of Alloys and Compounds

100

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“…The phosphorus content in the coating layer can be controlled by the deposition parameters, such as pH value, bath composition, etc. [15][16][17][18] The phase of coating layer with low phosphorus is microcrystalline, which is consistent with the results of Marshall et al [19] and Mai [20] They found that the nickel-phosphorus phase depended on the phosphorus content, and if the phosphorus content was between 3 and 7 wt pct, the phase was microcrystalline, amorphous between 7 and 9 wt pct. Figure 7 shows the XRD patterns of as-obtained NCFs annealed at different temperatures in vacuum.…”

supporting

confidence: 80%

Metallization of Carbon Fibers with Nickel by Electroless Plating Technique

Fan

Yang

Zhu

et al. 2007

Metall Mater Trans A

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Nickel-coated carbon fibers (NCFs) were fabricated by electroless plating. Sufficient activation sites were vital to deposit a continuous and uniform coating layer. The reaction mechanism and the effect of catalyzation time on the quality of the plating layer were especially discussed. The morphology and coating thickness of the NCFs, particle-size and phosphorus content in the coating layer, formation of the Ni 3 P phase, and its evolution with annealing temperature were examined by field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).In recent years, the study of nickel-coated carbon fibers has attracted considerable attention. The nickel coating layer enables the carbon fibers (CFs) to avoid chemical erosion sequentially enhancing the stability of the composite and also endues the composite with improved performance such as higher electrical conductivity, magnetism, excellent mechanical properties, and good adhesion between the composite and resin or metal. [1] Due to high strength and modulus, high electrical conductivity and magnetism, low weight and high aspect ratio, NCFs have been applied in many fields, such as electromagnetic interference (EMI) shielding, microwave absorption, and as reinforcing materials in plastics, ceramics, or metals. [2,3] Specifically, NCFs act as the conductive fibers to improve the electrical conductivity of polymers in EMI shielding and as electromagnetic wave absorber dispersed in an insulating matrix for microwave absorption.The CFs, however, usually have poor adhesion with nickel coatings due to the nature of their smoothness and chemical inertness. More and various functional groups, such as -COOH, -OH, and -O, are normally introduced on the fiber surface to improve the interfacial adhesion between the CF and the nickel coating. There are basically two routes to enhance the bonding properties of CFs, i.e., oxidative and nonoxidative. The oxidative treatments are extensively used, including air oxidation, [4] chemical oxidation [5][6][7][8] such as nitric acid treatment, [9,10] electrochemical oxidation, [11] plasma or ozone treatment, [12,13] etc. The nonoxidative treatments involve deposition of more active forms of carbon, such as the highly effective whiskerization, the deposition of pyrolytic carbon, or the grafting of the polymers on the fiber surface. [14] The treatment of immersing CFs in nitric acid, a simple and low cost process, can increase the acidic functional groups on the fiber surface and therefore enhance the interfacial adhesion of the fiber and the nickel coating.Little work, to our knowledge, has been done on the effect of the catalyzation time on the quality of the electroless-plated coating layer. Here, we especially investigate this effect and give a possible reaction mechanism of this process. The influence of plating time on the coating thickness, the element components in the coating, and the phase evolution of the coating with annealing temperature were also studied.The PAN (po...

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“…[85] It has been found that the P content and the thermal history determine the structure and properties of the electroless Ni layer. [108][109][110][111][112][113][114][115] In general, as-plated electroless Ni(Ni-P) layer is amorphous at high P contents (P greater than about 10 at.%) and tends to undergo self (or thermal)-crystallization on annealing. There are no significant compositional changes during crystallization.…”

Section: Detailed Interface Microstructure Of Solder Bumpmentioning

confidence: 99%

Microstructural evolution of eutectic Au-Sn solder joints

Song

2002

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Current trends toward miniaturization and the use of lead(Pb)-free solders in electronic packaging present new problems in the reliability of solder joints. This study was performed in order to understand the microstructure and microstructural evolution of small volumes of nominally eutectic Au-Sn solder joints (80Au-20Sn by weight), which gives insight into properties and reliability. The study particularly concentrated on the effects that the joint size and the type of substrate metallization have on both the bulk and interface microstructures of the joints. The systems studied were eutectic Au-Sn on Cu and Cu/electroless Ni/Au and for each system, two sets of sample geometries were used. The solubility characteristics and diffusional behavior of substrate metals into eutectic Au-Sn solder determines the detailed microstructure and microstructural evolution of the ultrafine eutectic Au-Sn joints. Two important things to be noted from the results are as follows: First, the overall microstructures of these joints are very coarse with respect to the size of joint, and hence the properties of the joints cannot be assumed from bulk solder data. Second, despite having a nominally similar starting eutectic Au-Sn composition, the microstructural features of the joints are unique for a given substrate metallization. Both of these results should be take into consideration during the design of reliable eutectic Au-Sn solder joints.

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Effect of Phosphorus Content of the Magnetic and Electric Properties of Electroless Ni–P Film after Heat Treatment

Cited by 38 publications

References 26 publications

Preparation and study on radar absorbing materials of nickel-coated carbon fiber and flake graphite

Preparation and study on radar absorbing materials of nickel-coated carbon fiber and flake graphite

Metallization of Carbon Fibers with Nickel by Electroless Plating Technique

Microstructural evolution of eutectic Au-Sn solder joints

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