• Title/Summary/Keyword: Ni-P plating

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A Comparative Study on Tribological Characteristics between Ni-P Electroless Plating and TiAlN Coating on Anodized Aluminum Alloy (아노다이징된 알루미늄 합금에 대한 TiAlN 코팅, 무전해 Ni-P 도금의 트라이볼로지 특성 비교)

  • Lee, Gyu-Sun;Bae, Sung-Hoon;Lee, Young-Ze
    • Tribology and Lubricants
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    • v.26 no.1
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    • pp.68-72
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    • 2010
  • A ceramic coating is a surface treatment method that is being used widely in the industrial field, recently. Ni-P plating is also being used widely because of its corrosion resistance and low cost. An anodizing method is applicable to aluminum alloy. An anodizing method generates a thick oxide layer on the surface and then, that heightens hardness and protects the surface. These surface treatments are applied to various mechanical components and treated surfaces relatively move one another. In this study, tribological characteristics of Ni-P plating and TiAlN coating on anodized Al alloy are compared. The counterpart, anodized Al alloy, is worn out abrasively by Ni-P plating and TiAlN coating that have higher hardness. Abrasively worn debris accumulated on the surfaces of Ni-P plating and TiAlN coating, and then transferred layer is formed. This transferred layer affects the amplitude of variation of friction coefficient, which is related to noise and vibration. The amplitude of variation of friction coefficient of Ni-P plating is lower than those of TiAlN coating during the tests.

Electroless Ni-P Plating and Heat Treatments of the Coating Layer for Enhancement of the Cavitation Erosion Resistance of Vessel Propellers (선박 프로펠러의 케비테이션 침식 저항 향상을 위한 Ni-P 무전해 도금층 형성 및 열처리를 통한 미세조직 제어)

  • Kim, Young-jae;Son, In-Jun;Yi, Seonghoon
    • Korean Journal of Materials Research
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    • v.27 no.8
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    • pp.409-415
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    • 2017
  • For enhanced cavitation erosion resistance of vessel propellers, an electroless Ni-P plating method was introduced to form a coating layer with high hardness on the surface of Cu alloy (CAC703C) used as vessel propeller material. An electroless Ni-P plating reaction generated by Fe atoms in the Cu alloy occurred, forming a uniform amorphous layer with P content of ~10 wt%. The amorphous layer transformed to (Ni3P+Ni) two phase structure after heat treatment. Cavitation erosion tests following the ASTM G-32 standard were carried out to relate the microstructural changes by heat treatment and the cavitation erosion resistance in distilled water and 3.5 wt% NaCl solutions. It was possible to obtain excellent cavitation erosion resistance through careful microstructural control of the coating layer, demonstrating that this electroless Ni-P plating process is a viable coating process for the enhancement of the cavitation erosion resistance of vessel propellers.

Aluminum Thin Film Capacitor Using Micro Pore Patterning and Electroless Ni-P plating

  • Lee, Chang-Hyeong;Zhang, Jingjing;Kim, Tae-Yu;Seo, Su-Jeong
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • pp.113-113
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    • 2011
  • 알루미늄 박막 커패시터 제작을 위해 선택적인 알루미늄 etching과 anodizing을 이용한 유전체($Al_2O_3$) 형성, 전극층 형성을 위한 무전해 Ni-P 도금을 진행하였다. $5{\mu}m$ patterns/$10{\mu}m$ space를 가지는 dot patterns을 알루미늄 기판에 patterning하고, 이를 각각의 전류밀도 조건에서 etching한 후, barrier type anodizing을 진행하였다. 유전체에 전극층은 무전해 Ni-P 도금을 통해 형성하였으며, 이렇게 제작된 알루미늄 박막 커패시터 특성을 평가하였다.

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Nano Crystalline Change by Heat Treatment

  • Sun, Yong-Bin
    • Journal of the Semiconductor & Display Technology
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    • v.12 no.4
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    • pp.55-59
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    • 2013
  • Mold die sticking arises from silica filler abrasion to the cavity surface. Ni-P electroplating was examined to substitute conventional hard Cr plating. More than 4% of Phosphorus in the electroplated film produces nano crystal structure and annealing makes $Ni_3P$ precipitated to get hardness values equivalent to hard Cr.

Electrical and Resistance Heating Properties of Carbon Fiber Heating Element for Car Seat (자동차 시트용 탄소섬유 발열체의 전기적 및 저항 발열 특성)

  • Choi, Kyeong-Eun;Park, Chan-Hee;Seo, Min-Kang
    • Applied Chemistry for Engineering
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    • v.27 no.2
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    • pp.210-216
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    • 2016
  • In this paper, the electrical and resistance heating properties of carbon fiber heating elements with different electroless Ni-P plating times for car seat were studied. The specific resistance and specific heat of the carbon fibers were determined using 4-point probe method and differential scanning calorimetry (DSC), respectively. The surface morphology and temperature of carbon fibers were measured by scanning electron microscope (SEM) and thermo-graphic camera, respectively. From experimental results, the nickel layer thickness and surface temperature of carbon fibers increased with increasing the plating time. However, the specific heat and specific resistance decreased with respect to the increased plating time. In conclusion, the electroless Ni-P plating could improve the resistance heating and electrical properties of carbon fiber heating elements for car seat.

Design of Fast Acting Fuse Characteristics Using a Precision Multi-layer Thin Film Plating (정밀 다층 박막 도금을 이용한 빠른 동작 퓨즈 특성 설계)

  • Kim, Eun-Min;Kang, Chang-Yong
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.3
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    • pp.445-451
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    • 2016
  • General fuse elements of solution for fast acting operation characteristics made using silver or silver alloy, those are not able to dominate cost competition to the advanced global leaders that have not only high technology but competitive price. In this study, the method that compose the fuse elements manufactured solution of fast acting operation characteristics by using precision multi-layer thin film plating and helical cutting process from low-priced copper metal. Furthermore, in order to move rated current line of fuse due to the heat loses, the manufacture construction method of fixed resistor is introduced, and then Ni-P plating layer and Sn plating layer are introduced multiply for controling fine opening time characteristics. So this study can establish the high productive and low-priced production method.

Diamond Films on Electroless Ni-P Plated WC-Co Substrates (무전해 Ni-P도금층/WC-Co기판 상에 다이아몬드 막 제조)

  • Kim, Jin-Oh;Kim, Hern;Park, Jeong-Il;Park, Kwang-Ja
    • Applied Chemistry for Engineering
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    • v.8 no.5
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    • pp.742-748
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    • 1997
  • Diamond films which have high hardness and thermal conductivity can be used to improve the performance of WC-Co as a cutting tool material. However, it is difficult to get such coatings of good uniformity and adhesiveness due to the surface characteristics of WC-Co. To get better coatings, some techniques, such as the surface treatment of substrate or the formation of interlayer between substrate and diamond film, have been tried. In the present work, the nickel interlayer is formed onto WC-Co by electroless Ni-P plating, which is introduced as a new method, and then diamond film is deposited on the interlayer. Formation and uniformity of three layers, i.e., substrate, electroless plate, and diamond film, and the adhesiveness of interlayers were studied. To investigate the effects of pretreatment on electroless plating, two different methods such as acid treatment and diamond powder treatment were used. The effects of heat treatment of the electroless plated surface on adhesiveness between the substrate and the interlayer were examined. It was found that as the temperature increases, the Ni crystals grow and then result in improved adhesiveness. Diamond film coatings of pure diamond phase were obtained at $800^{\circ}C$. It is concluded that the heat treated electroless Ni-P plating can be effectively used as a interlayer between WC-Co substrate and diamond film.

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Catalytic NiO Filter Supported on Carbon Fiber for Oxidation of Volatile Organic Compounds

  • Sim, Jong Ki;Seo, Hyun Ook;Jeong, Myung-Geun;Kim, Kwang-Dae;Kim, Young Dok;Lim, Dong Chan
    • Bulletin of the Korean Chemical Society
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    • v.34 no.7
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    • pp.2105-2110
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    • 2013
  • Carbon-fiber-supported NiO catalytic filters for oxidation of volatile organic compounds were prepared by electroless Ni-P plating and subsequent annealing processes. Surface structure and crystallinity of NiO film on carbon fiber could be modified by post-annealing at different temperatures (500 and $650^{\circ}C$). Catalytic thermal decompositions of toluene over these catalytic filters were investigated. $500^{\circ}C$-annealed sample showed a higher catalytic reactivity toward toluene decomposition than $650^{\circ}C$-annealed one under same conditions, despite of its lower surface area and toluene adsorption capacity. X-ray diffraction and X-ray photoelectron spectroscopy studies suggest that amorphous structures of NiO on $500^{\circ}C$-annealed catalyst caused the higher reactivity for oxidation of toluene than that of $650^{\circ}C$-annealed sample with a higher crystallinity.

Effects of Multi-Complex Agent Addition on Characteristics of Electroless Ni-P Solution (복합 착화제 첨가가 무전해 Ni-P 도금액의 특성에 미치는 영향)

  • Lee, Hong-Kee;Lee, Ho-Nyun;Jeon, Jun-Mi;Hur, Jin-Young
    • Journal of the Korean institute of surface engineering
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    • v.43 no.2
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    • pp.111-120
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    • 2010
  • In this study, the effects of multi-complex agents addition on characteristics of electroless Ni plating solution are investigated. The species and the concentration of complexing agents are major factors to control the deposition rate, P concentration, and surface morphology of plating films. Adipic acid increases the deposition rate in regardless of single- or mutli-complex agent addition. However, lactic acid effectively increases the deposition rate in case of multi-addition as the complex agents with adipic or sodium succinate acid. In addition, sodium citric acid and malic acid show good stabilizing effects of plating solution and lowering the deposition rate, because they have high complexibility. Therefore, it is suggested that the development of Ni-P plating solution suitable for diverse usages can be carried out systematically using the database from this study.