A New Approach to the Formation Mechanisms and Tribology Properties of Microdiamond-Incorporated Nickel Matrix Composite Layers Coated on Brass Substrates by Composite Electrodeposition Technology

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Project title

Code/計畫編號

MOST109-2221-E019-027

Translated Name/計畫中文名

複合電沉積製程技術應用於黃銅表面被覆微米鑽石-鎳基複合膜之成膜機制與磨耗性能的創新研究

Project Coordinator/計畫主持人

Chau-Chang Chou

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Mechanical and Mechatronic Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=13540391

Year

2020

Start date/計畫起

01-08-2020

Expected Completion/計畫迄

31-07-2021

Bugetid/研究經費

854千元

ResearchField/研究領域

機械工程

本計畫預期以兩年期開發複合電化學沉積技術，將微米鑽石顆粒與陽極鎳基質金屬共同沉積於黃銅底材，第一年利用旋轉圓柱電極技術，以製作兼具銑削功能之高速微型刀具為目標；第二年發展噴流沉積技術，以製作大面積銅/鎳-鑽石複合鍍層之研磨工具為目標，同時可後續擴展應用到圓盤放電電極上，做為後續開發複合放電研磨技術的基礎。本計畫將分別探討此兩種製程技術之鑽石複合鍍層的材料微結構、結合強度和電化學特性。鍍層均以電鍍純銅為底層，再複合電沉積鎳-鑽石顆粒，然後以純鎳鍍層固定，以達到增強表面鍍層機械性能和提高刀具綜合性能的目的。本研究同時藉助軟體模擬，建立圓柱容器攪拌電沉積和噴流電沉積的流場、電場和顆粒追蹤多物理場耦合數值模型，以模擬真實實驗條件，分析攪拌速度、電流密度、結構幾何參數、流量和噴流掃描速度等變因對鍍層鑚石含量和分佈的影響。實驗樣品透過粗度儀、光學顯微鏡分析表觀特徵，利用聚焦離子束、電子顯微鏡(SEM和TEM)、能譜分析儀、拉曼光譜儀、X光繞射儀對鍍層表面微結構及成分進行分析，比較在不同參數與條件下之表面形貌和薄膜結構之變化。由壓痕試驗、刮痕實驗和磨耗實驗，比較不同製程參數的薄膜硬度、結合強度以及磨耗性能，使用循環伏安法和電化學阻抗頻譜測量鍍層的電化學特性。並以強化玻璃為實際加工對象，測試多層膜的機械性能，尤其是在耐磨性和耐久性方面，相較於傳統修復加工之刀具的優勢。複合電沉積技術的機制以及鍍層薄膜的磨耗性能是本計畫的探討重點，希望能透過本研究提供製備這種鍍層材料的最佳製程方法，以大幅提升相關刀具的耐磨性和壽命。 This two-year project is going to develop the composite electrodeposition technique, which co-deposite micro-diamond particles and anodic copper/nickle metal matrix on a brass substrate. The first year is devoted to the bath-type rotational cylinder electrodeposition (RCE) technique and plans to build a high-speed micro machine tool for milling; the second year moves to jet electrodeposition (JED) technique and, grinding/polishing tool with large area. The microstructure, adhesion, and electrochemical properties of these coatings are respectively studied. In order to improve the mechanical properties of copper/nickle-diamond multilayers, a pure copper layer will be deposited as the base layer and a pure nickle layer, as the outmost and enforced layer. In this project, we will also implement multi-physical simulation, to establish and simulate the particle flow and electric field model under real conditions for RCE as well as JED techniques. Surface morphology, microstructures, phases, and composition of the films will be analyzed by focused ion beam microscopy, electron microscopies (SEM and TEM), Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The mechanical properties of coatings will be investigated by indentation, scratch, and wear test. Electrochemical behavior will be studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in a standard solution. The key points of this project are the composite electrochemical deposition technique and the adhesion between the interfaces of composite materials and the substrate. This project is supposed to provide a new approach to the optimal manufacture technique for building the related tools with much higher wear resistance and longer life.

Keyword(s)

電化學沉積
複合層
鑽石
耐磨性
結合力
多物理耦合模擬
electrodeposition
composite layer
diamond
wear resistance
adhesion
multi-physical simulation

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A New Approach to the Formation Mechanisms and Tribology Properties of Microdiamond-Incorporated Nickel Matrix Composite Layers Coated on Brass Substrates by Composite Electrodeposition Technology

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