| 摘要: | 本研究以探討6063 鋁合金陽極處理所生成多孔陽極皮膜為主軸。經由退火、 時效硬化與輥軋變形後，觀察其微結構、晶界角度分佈與析出物型態。再陽極處 理，並討論基地結構對陽極皮膜的影響。分析陽極過程中電壓與時間(V-t)變化曲 線，透過SEM 觀察前製程的微結構對陽極多孔皮膜生長行為的影響。並在V-t 曲 線的第四階段使用二次離子質譜儀(SIMS)與第二階段使用光電子能譜儀(XPS)分 析陽極皮膜組成成分。 由實驗結果發現到，EBSD 分析(O, O-T4-T6, O-rolling40%-T4-T6)晶界在中 高角度; O-T4-rolling40%-T6 觀察，晶界從中高角度大量轉變為低角度，因此6063 鋁合金經輥軋後微結構發生變化會影響Mg2Si 析出相變化。觀察V-t 曲線，經輥軋 後的試片在第二階段時電壓較高而第三階段所消耗能量較低，因此陽極孔洞數量 少而孔徑較大。觀察陽極皮膜的成份分析，因為輥軋變形後基地中產生差排和氫 氣，使氧化鋁膜矽(Si)離子減少，並且影響氫氧化鋁(AlOH)離子增加。X 光電子能 譜分析陽極氧化鋁膜主要由非晶氧化鋁Al-O-H 與水合氧化鋁Al(OH)3所組成。O 1s 部分分析退火材主要由非晶氧化鋁組成和少量Al-O 約10.5 %，O-rolling40%-T4-T6 與O-T4-rolling40%-T6 發現Al-O 增多。觀察Si 2p 部份分析6063 鋁合金陽極皮膜 中成分含有Al2SiO5。 The aim of the study is to investigate the effect of the anodic aluminum oxide film (AAO film) formed on the 6063 aluminum alloy by using anodizing treatment. Through the manufacturing process including annealing, artificial ageing treatment and cold-rolling, the variation of AAO film of 6063 aluminum alloy revealed especially on its microstructure, the angle of grain boundaries and the status of precipitate materials. Furthermore, the anodizing was utilized to explore the influence on the AAO film from the base structure. Also, voltage-time (V-t) curve in the process of anodizing was recorded. After the above manufacturing process, the effect of the microstructure on the growing behavior of the porous AAO film was observed by using SEM. In addition, the SIMS was used to examine element the depth profiles of AAO film in the step 4 of V-t curve. Then, the XPS was utilized to analyze the composition of AAO film surface in the step 2 of V-t curve. As the EBSD results indicated that the grain boundary was at medium/ high angle present in O, O-T4-T6, O-rolling40%-T4-T6 specimens. In comparison, the main grain boundary was low angle with O-T4-rolling40%-T6 specimen. Thus, the microstructure of 6063 aluminum alloy significantly changed during the cold-rolling process. It affected the Mg2Si precipitate particles, and the phase transformation occurred. In respect to the variation of V-t curve, the voltage of the test fragment with cold-rolling process became higher in the step 2. Moreover, the above test fragment consumed less energy in the step 3. Concerning the cold-rolled 6063 aluminum alloy, therefore, it is suggested that the decreasing of pore population, and increasing the pore diameter of the AAO films. As SIMS analysis, the distribution of Si ion reduced with depth of AAO film, and AlOH was raised. Consequently, there were several findings from the XPS analysis as III following. In the O 1s analysis, the AAO film mainly contains of Al-O-H bonding phase, Al(OH)3 hydrated oxide and several Al-O bonding phase. O-rolling40%-T4-T6 and O-T4-rolling40%-T6 obtained higher Al-O bonding phase. Because of the dislocation and hydrogen were produced in the Al matrix after the cold rolling process. Regarding with the dimension of Si 2p, it was investigated that the main composition of AAO film is Al2SiO5. |
