臺灣博碩士論文加值系統

複合電鍍發展至今近四十年已有許多研究成果，其應用性在近年來也多受重視。迄今為止，複合鍍仍然不斷地發展且成功的使用在汽車及模具工業上。而關於複合電鍍的研究範圍則涵蓋動力學、粉體分散性以及各種不同參數對鍍層性質的影響。本研究主要探討複合鍍層之機械性質與電化學特性，並利用顯微結構加以佐證。此外，亦針對石墨鑽石粉末進行粒徑分析、穿透式電子顯微鏡觀察。
本實驗採用氨基磺酸鎳浴，加入「奈米級」之石墨鑽石（Diamond-graphite）粒子，控制鍍浴成份、pH值、溫度等，定庫倫電量下，改變電流密度、粉末含量以及陰極轉速，各參數變化下所得的複合鍍層再進行各項檢測，包括機械性質、表面形貌、顯微結構以及電化學分析等。
由實驗結果可知，複合鍍層硬度可得到明顯地提升，其中硬度值隨電鍍中所添加的粉末含量增加而變大。在電化學方面：鈍態電位以及鈍態電流皆隨著陰極轉速、電流密度、鍍液中粉體添加量而有不同的變化；在表面形貌方面：複合鍍層表面呈現不規則突起，藉表面粗度測試及掃描式電子顯微鏡進行觀察分析；在顯微結構方面：由掃瞄式電子顯微鏡配合EDX能譜分析觀察鍍層組織及其微結構。

Over the past two decades a considerable number of studies have been made on composite electrodeposition and its application has been received much attention. Up to now, composite electrodeposition which is successfully expand into the automobile and mold industry has been well developed unceasingly. The study of composite electrodeposition contains kinetic, dispersed of particle and the influence of different parameters. In this paper, the mechanical and electrochemical properties of codeposition layer were studied, and proved these properties by microstructure. In addition, the geometry and diameter of nano-graphite-diamond particles were also observed by TEM and Ultrafine Particle Size Analyzer.
The composite electroplating was conducted in a nickel sulfomate bath containing various contents of graphite-diamond nanoparticles. The composite deposits were plated with different current densities and rotation speed. The composition, pH and temperature of plating bath were kept constant. The surface morphologies, electrochemical properties and their hardness variations of the composite deposits were analyzed after electroplating with different parameters.
Experimental results indicated that the hardness of the nickel deposit was apparently improved by adding nanoparticles in the deposit. Furthermore, the hardness increased with increasing the content of nanoparticles in the bath. In electrochemical analysis, the corrosion potential, critical potential and passive current density of the composite deposits were strongly depended on the plating parameters. Nodular morphology of the composite deposit can be observed with SEM. In the microstructure, the distribution of graphite-diamond nanoparticles in the composite coatings was identified by using SEM/EDX.

第一章 研究背景及文獻回顧
1.1 複合鍍簡介及其應用發展
1.2 電鍍之金屬沈積原理
1.3 電鍍均厚能力
1.4 複合電鍍共沈積機制
1.5 粉體與鍍液之介面
1.6 添加劑的影響
1.7 複合鍍層表面形貌及機械性質
1.7.1 表面粗度
1.7.2 微硬度
1.8 複合鍍層表面陽極極化分析
第二章 研究目的
第三章 實驗流程
3.1 試片備製及前處理
3.2 複合電鍍
3.3 機械性質測試
3.3.1 微硬度測試
3.3.2 表面粗度量測
3.4 動電位陽極極化掃描
3.5 掃描式電子顯微鏡
第四章 結果與討論
4.1 粒徑分析結果
4.2 微硬度測試
4.3 表面粗度量測
4.4 陽極極化測試
4.5 掃描式電子顯微鏡觀察
第五章 結論
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