생분해성 마그네슘 합금의 펨토초 레이저 표면 개질을 통한 코팅 능력 개선

Title
생분해성 마그네슘 합금의 펨토초 레이저 표면 개질을 통한 코팅 능력 개선
Authors
박재호한형섭이선희박지민김유찬옥명렬석현광정석이지욱전호정
Issue Date
2015-11
Publisher
대한기계학회
Abstract
Laser surface engineering is emerging as a useful tool for surface modification of materials due to its simple and effective process. Surface modification engineering by laser is possible for non-contact machining and selective process depending on the conditions of the laser such as laser beam size, wavelength, power and so on. Among laser surface engineering, laser surface texturing is an effective technique due to its effectiveness to create dual scale roughness structures resulting in change of surface energy and wettability such as hydrophilic or hydrophobic property. In this study, using femtosecond(fs) laser surface modification, we gave Mg surface super hydrophilic wettability so that we expected improvement of adhesion ability of biodegradable coating layer for controlling corrosion rate. Laser treatment group and non laser treatment group were spin-coated with biodegradable polymer PLGA(poly lactic-co-glycolic acid). Immersion test was conducted in cell media for 7 days. In the immersion test, Mg ion assay showed that the coating layer on laser treated Mg has less Mg ion than the control group. And we could observe that cross-section of laser treated group shows coating layers infiltrate deeper onto the surface. From these data, we expected improvement of adhesion strength due to imbedded coating layer between microscale pits and grooves. Henceforth, through fs laser surface modification, it can be expected to be utilizing in variety of coating technique engineering.
URI
http://pubs.kist.re.kr/handle/201004/50560
Appears in Collections:
KIST Publication > Conference Paper
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE