• 제목/요약/키워드: materials science

검색결과 32,826건 처리시간 0.051초

Deposition of Fine Linewidth Silver Layer using a Modified Laser-induced Forward Transfer Technique

  • Cheon, Jonggyu;Nguyen, Manh-Cuong;Nguyen, An Hoang-Thuy;Choi, Sujin;Ji, Hyung-Min;Kim, Sang-Woo;Yu, Kyoung-Moon;Kim, Jin-Hyun;Cho, Seong-Yong;Choi, Rino
    • Journal of the Korean Physical Society
    • /
    • 제73권9호
    • /
    • pp.1279-1282
    • /
    • 2018

  • This paper reports the deposition of a metal line using a multilayer stack and laser-induced forward transfer (LIFT) using a low cost continuous wave blue laser with a wavelength of 450 nm. The donor structure was composed of a light-to-heat (LTH) layer, a release layer, and a transfer layer in series. Amorphous silicon as the LTH layer absorbs photon energy and converts it to heat. A release layer was melted so that a silver transfer layer would be transferred to the receiver substrate. The transferred silver layer showed reasonable physical and electrical characteristics. A low cost fine linewidth metal layer could be achieved using this modified LIFT technique and blue laser.

  • https://doi.org/10.3938/jkps.73.1279 인용 KSCI

Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning

  • Choi, Yong-Mun;Jung, Jin;Hwang, Jun Yeon;Kim, Seung Min;Jeong, Hyeonsu;Ku, Bon-Cheol;Goh, Munju
    • Carbon letters
    • /
    • 제16권4호
    • /
    • pp.223-232
    • /
    • 2015

  • This review presents current progress in the preparation methods of liquid crystalline nano-carbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide.

  • https://doi.org/10.5714/CL.2015.16.4.223 인용 PDF KSCI KPUBS HTML

Effect of Carbon on Wear Resistance in Self-lubricating Fe-Cr-C-Mn-Cu Alloys

  • Kim, Ki Nam;Shin, Gyeong Su;Park, Myung Chul;Lee, Sung Yong;Yun, Jae Yong;Kim, Seon Jin
    • 대한금속재료학회지
    • /
    • 제50권9호
    • /
    • pp.637-643
    • /
    • 2012

  • Recently, because of safety and environmental concerns, there has been a tendency to introduce solid self-lubricating composites for bearing materials. In this paper, we developed Fe-Cr-C-Mn-Cu cast composite alloys as a self-lubricating composite and investigated the effect of carbon on the formation of protective tribofilms during sliding. The wear resistance of these materials was mainly affected by carbon concentrations due to the fact that in particular wear passed from delamination to tribo-oxidation, reducing the wear rate. The improved wear resistance likely resulted from protective tribofilms that formed on the surface during sliding.

  • https://doi.org/10.3365/KJMM.2012.50.9.637 인용 KSCI