The porous anodic aluminum oxide (AAO) film on a pure aluminum substrate was pre pared by a two-step anodization in a 0.3M oxalic acid solution and pore-enlargem ent treatment in the phosphoric acid aqueous solution a...The porous anodic aluminum oxide (AAO) film on a pure aluminum substrate was pre pared by a two-step anodization in a 0.3M oxalic acid solution and pore-enlargem ent treatment in the phosphoric acid aqueous solution at 50℃. The diameter of h ighly ordered pore on the AAO film was about 90nm, and the thickness of the AAO film was 3μm. The mineral oil was infiltrated in the ordered nanometer sized po res of AAO film on an aluminum substrate due to the capillarity effect. The fric tion coefficient was measured using a ball-on-disk tribotester. The tests were c onducted at loads range from 490 to 2450mN and at sliding velocities between 0.1 and 0.5m·s-1. Oil infiltration in porous AAO film modified friction and consid erably improved the wear resistance. As compared to the porous AAO film, the oil -infiltrated specimen had low friction coefficient. With increasing the applied load and sliding velocity, the friction coefficient of the oil-infiltrated film decreased. It indicates that the oil-infiltrated AAO film produced a new way to modify the friction and wear of aluminum alloy.展开更多
Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of Y...Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of YBO3∶Eu3+ thin films were confirmed by EDX, XRD and PL spectra. The PL spectra show that the characteristic emission of the YBO3∶Eu3+/AAO thin film is the 5D0 →7F1 transition.展开更多
基金This work was supported by the National Natural Science Foundation of China(No.50271067)Zhejiang Provincial Natural Science Foundation of China(No.ZC0203).
文摘The porous anodic aluminum oxide (AAO) film on a pure aluminum substrate was pre pared by a two-step anodization in a 0.3M oxalic acid solution and pore-enlargem ent treatment in the phosphoric acid aqueous solution at 50℃. The diameter of h ighly ordered pore on the AAO film was about 90nm, and the thickness of the AAO film was 3μm. The mineral oil was infiltrated in the ordered nanometer sized po res of AAO film on an aluminum substrate due to the capillarity effect. The fric tion coefficient was measured using a ball-on-disk tribotester. The tests were c onducted at loads range from 490 to 2450mN and at sliding velocities between 0.1 and 0.5m·s-1. Oil infiltration in porous AAO film modified friction and consid erably improved the wear resistance. As compared to the porous AAO film, the oil -infiltrated specimen had low friction coefficient. With increasing the applied load and sliding velocity, the friction coefficient of the oil-infiltrated film decreased. It indicates that the oil-infiltrated AAO film produced a new way to modify the friction and wear of aluminum alloy.
文摘Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of YBO3∶Eu3+ thin films were confirmed by EDX, XRD and PL spectra. The PL spectra show that the characteristic emission of the YBO3∶Eu3+/AAO thin film is the 5D0 →7F1 transition.
