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題名 | 鋁合金微弧氧化陶瓷膜層性質之研究=The Study of Ceramic Coating Characteristics on Aluminum Alloy by Use of Microarc Oxidation Method |
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作者 | 曾國輝; 李九龍; | 書刊名 | 龍華科技大學學報 |
卷期 | 22 2007.03[民96.03] |
頁次 | 頁59-69 |
分類號 | 472.5 |
關鍵詞 | 微弧氧化; 鋁合金; 陶瓷膜; 耐蝕性; Microarc oxidation; Aluminum alloy; Ceramic coating; Corrosion resistance; |
語文 | 中文(Chinese) |
中文摘要 | 鋁和鋁合金質輕且易加工,並且可以製成非常複雜的零件,因而在工業上的應用日益廣泛,而本研究以微弧氧化技術(Micro-Arc Oxidation,MAO)在鋁合金表面形成氧化陶瓷膜,以提高其硬度與耐蝕性。本研究分為理論性與應用性兩部分,由理論性研究結果顯示:陶瓷膜中α-Al₂O₃相的含量與硬度隨電流密度而增加;由交流阻抗法與極化曲線圖均顯示:在不同電流密度下,鋁合金經微弧氧化處理後之耐蝕性均較基材優異,腐蝕速率可減緩1000倍以上。由應用性研究結果顯示:微弧氧化所得之陶瓷膜硬度可達1280Hv;陶瓷膜表面硬度與TiO₂的含量會隨著反應時間、電解液TiO₂含量與電流密度而增加。以田口實驗計劃法得到最佳操作條件(鎢酸鈉8g/l、TiO₂ 0.5g/l、電流密度7A/dm²和反應時間60分鐘)進行微弧氧化反應,得到膜層之硬度高達1380Hv。 |
英文摘要 | Aluminum alloy has been widely used in the industry because the characteristic of light mass and easy manufacturing for complicated components. By use of microarc oxidation (MAO) methods, this study produces and oxidized ceramics coating on the surface of aluminum alloy substrate. The objective aims to enhance the hardness and corrosion resistance of the aluminum alloy substrate. This study divides into theoretical and applicable parts: the theoretical results indicate that the α-A1₂O₃ content and hardness of the ceramic coating are increase with the current density. The results of AC impedance methods and polarization curve both show that the corrosion resistance of the ceramic coating is superior to the substrate at different current density and the corrosion rate may be retarded to three orders or more. The applied results indicate the optimal operational condition by use of Taguchi experimental plan: Sodium tungstate concentration 8g/L, TiO₂ 0.5g/L, current density 7A/dm² and reaction time 60min. Furthermore, the optimal hardness of the ceramic coating may reach to 1380Hv. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。