A specific chemical activation pretreatment for electroless nickel plating on SiC ceramic powders

Luo, Lei; Zhang, Lu; Tan, Xiao–Yue; Ding, Xiao-Yu; Huang, Limei; Cheng, Jigui; Zhu, Liu; Wu, Yucheng

doi:10.1016/j.powtec.2013.08.039

Cited by 27 publications

(13 citation statements)

References 17 publications

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“…Dense reactive place was formed, which is the major causes of severely agglomerated plated powders. Control distribution of activated sites is the most effective method for obtaining uniform distribution of plated particles 13 – 17 . The preparation of uniform distribution of metal particles on PA12 powders surface by electroless plating technique is still not well studied.…”

Section: Introductionmentioning

confidence: 99%

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Gui

Chen

Yao³

et al. 2018

Sci Rep

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In this work, Ni particles/PA12 powders (Ni/PA12) and graphite oxide (GO)-encapsulated Ni particles/PA12 powders (GO-Ni/PA12) composite powders were prepared by defect-included electroless plating technique, and its laser sintered behaviour was investigated. Results showed that a lot of defects could formed on the surface of CH3COOH etched PA12 powders. The defects would induce Ni and GO-Ni particles independently plated on the PA12 surface. Adding GO in the plating solution would facilitate the deposition of Ni particles, GO, and NiO on the PA 12 surface, but inhibit the growth and the crystallinity of the Ni particles. The SLS process involved the contact of PA12 powders, the formation of sintering neck, the growth of sintering neck and the formation of fused solid. Sintering process could facilitate the re-arrangement of Ni particles due to surface tension and the growth of sintering neck. The Ni particles had well wettability, and the interfaces between Ni particles and PA 12 were contacted soundly. The tensile strength and bending strength of the 10 W-sintered Ni/PA12 specimen were 50 MPa and 60 MPa. But SLS process caused the serious aggregation of GO-Ni particles due to higher concentration, activity and surface area of GO-Ni particles.

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Section: Introductionmentioning

confidence: 99%

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Gui

Chen

Yao³

et al. 2018

Sci Rep

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“…In order to solve this problem, various electromagnetic wave shielding materials have been developed. Such materials include metal powders of silver, copper, nickel, cobalt, and metal alloy films, and these materials possess excellent conductivity [1][2][3][4][5]. However, the disadvantages such as high density, high cost, and poor processibility greatly restrict their practical use for shielding materials.…”

Section: Introductionmentioning

confidence: 99%

Silver-coated glass fibers prepared by a simple electroless plating technique

Zhou

Chen

et al. 2014

J Mater Sci: Mater Electron

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Silver-coated glass fibers have been successfully fabricated using a simple electroless silver plating. The structures of the silver/glass fiber composites were characterized by X-ray diffraction, high-resolution transmission electron microscopy, and scanning electron microscopy, respectively. The morphology investigation showed that the silver coatings were compact and continuous. The minimum volume resistivity could reach 4.53 9 10 -4 X cm, suggesting excellent electric conductivity. It was found that the quality of silver deposition was influenced by dosage of ammonia solution and plating temperature. Ammonia solution served as complexing reagent and supplied an alkaline media, and higher temperature easily led to metallic oxidation. The current method is simple-handle, inexpensive, large production, and the obtained silver/glass fibers can be used as fillers to fabricate electromagnetic wave shielding materials.

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“…Nevertheless, most of the time, works have investigated coatings on graphite particles of graphite fibers in an alkaline bath [23] or containing specific chemical agents [24]. Chemical activation pretreatment of powder has also proven to be successful in improving the wettability and the activity of graphite [25,26], as well as the electrochemical deposition of Ni on carbon microfiber surfaces using unbuffered NiCl 2 [27].…”

mentioning

confidence: 99%

Study of Electroless Nickel Coatings on EN-GJS-500-7 Spheroidal Graphite Cast Iron

2018

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EN-GJS-500-7 spheroidal graphite (SG) cast iron was coated with chemical Ni-P. The kinetic study reveals that the limiting step corresponds to a classical surface process, but the morphological study shows, at short times, an imperfect Ni-P coating on the graphite spheroids. The initial Ni-P growth appears to be blocked. This problem has been solved by the application of a cathodic polarization for a few minutes as a pretreatment of the surface. It was observed after this first step that both chemical and electrochemical reduction of nickel cation and hypophosphite on the SG cast iron took place at the same time, leading to the growth of a homogeneous Ni-P scale, in particular on graphite spheroids.

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A specific chemical activation pretreatment for electroless nickel plating on SiC ceramic powders

Cited by 27 publications

References 17 publications

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Silver-coated glass fibers prepared by a simple electroless plating technique

Study of Electroless Nickel Coatings on EN-GJS-500-7 Spheroidal Graphite Cast Iron

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