鋁材熱處理對氧化鋁膜生成的影響

The effect of aluminum heat treatment on the growth of aluminum oxide film

葉國裕(Kuo-yu Yeh)

指導教授 ： 施幸祥

大同大學/工程學院/化學工程學系所/碩士(2005年)

摘要

本研究在探討經過退火後之鋁材，表面再加以硫酸溶液陽極處理後，所得氧化膜之表面情形及機械性質。期望利用熱處理之優點，獲得更良好的氧化鋁。
結果發現，經過一定溫度下退火處理後，由於表面結晶組織重新排列，可加速進行膜的生長速率，並改善表面的生長情形。在熱處理後所產生的結晶相，由X-ray繞射分析得知為-Al2O3，會影響所產生的氧化鋁膜密度及硬度，並且在溶膜實驗中減緩了鉻酸對膜的溶解速率。
並由於退火處理調整結晶組織的特性，在鉬酸銨預浸置的處理後，減少水氧化鉬膜的抑制並且促進氧化鋁膜生長，使厚度有改良的效果。

關鍵字

氧化鋁膜 ； 退火

並列摘要

This research is to investigate the surface conditions and mechanical properties of the oxidized films of the aluminum materials after annealing then anodized in an electrolyte containing sulfuric acid, expecting that by taking the advantages of heat treatment, better aluminum oxide layer can be obtained.
From the results, it was discovered that after the annealing treatment at given temperature, because of the rearrangement of the surface crystalline structure, the growth produce of the film can be accelerated and the growth condition of the surface can be improved. From the analysis of X-ray diffraction, it is known that the crystalline produced after the heat treatment is -Al2O3; -Al2O3 would produce effect on both the density and hardness of the aluminum oxide film, and would slow down the dissolution rate of the film.
In addition, it is found that after the preimmersing treatment with ammonium molybdate, because of the adjustment of the properties of crystalline structure of annealing treatment, the inhibition of the molybdic oxyhydroxide film is decreased, and the growth of the aluminum oxide film is promoted, causing the film thickness to be improved.

並列關鍵字

aluminum oxide film ； annealing

參考文獻

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