• Title/Summary/Keyword: coating layer

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Transparent Electrode Forming Technology using ESD Coating Methode (ESD 기법을 이용한 투명전도막 형성 기술)

  • Kim, Jung-Su;Kim, Dong-Soo
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.348-348
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    • 2009
  • The conductive coating method is used for various industrial fields. For example, Sputtering process is used to coat ITO layer in LCD or OLED panel manufacture process and fabricate a base layer of substrate of an electric printing device. However, conventional coating processes (beam sputtering, spin coating etc.) has a problems in the industrial manufacturing process. These processes have a very high cost and critical manufacturing environment as a vacuum process. Recently, many researchers have proposed various printing process instead of conventional coating processes. In this paper, we propose an ESD printing process in ITO coating layer and apply to fabricate a conductive coating film. Furthermore, the effect of the nozzle and also the applied voltage on different configuration of the nozzle head was also studied for better understanding of the Electro Static deposition process.

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Welding Characteristics of Aluminized Steel Sheet by Nd:YAG Laser(I) - Effects of AI Coating Weight on Weld Strength - (Nd:YAG 레이저를 이용한 알루미늄도금강판의 용접성(I) - 알루미늄 도금부착량이 용접부 강도에 미치는 영향 -)

  • Kim, Jong-Do;Lee, Jung-Han;Kim, Ki-Chol
    • Journal of Welding and Joining
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    • v.25 no.4
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    • pp.65-71
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    • 2007
  • Laser weldability of the aluminized steel for the full penetration welding will be described in this paper. We focused on the effect of Al coating conditions on weld strength. For these objectives, aluminized steel sheets that have various thickness and coating weight were prepared for laser welding. And then, tensile-shear and hardness test were carried out. At the same time, Al contents in weld after laser welding were analyzed and their correlations with mechanical properties were investigated. Besides, as removing partially coating layer, weldability has been investigated according to the position of coating layer. As a result of this study, tensile-shear strength was decreased with increasing Al contents in weld, and Al of coating layer caused grain growth.

A Study on the Roll Manufacturing Technology Applying Powder Flame Spray Coating Technology of Ni-Based Alloy Powder (Ni계 합금분말 용사 코팅기술을 적용한 롤 제조기술 연구)

  • Park, Ji Woong;Kim, Soon Kook;Ban, Gye Bum
    • Journal of Powder Materials
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    • v.29 no.2
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    • pp.123-131
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    • 2022
  • The purpose of this study is to improve the mechanical properties and develop manufacturing technology through self-soluble alloy powder flame spray coating on the surface of a run-out table roller for hot rolling. The roller surface of the run-out table should maintain high hardness at high temperatures and possess high wear, corrosion, and heat resistances. In addition, sufficient bonding strength between the thermal spray coating layer and base material, which would prevent the peel-off of the coating layer, is also an important factor. In this study, the most suitable powder and process for roll manufacturing technology are determined through the initial selection of commercial alloy powder for roll manufacturing, hardness, component analysis, and bond strength analysis of the powder and thermal spray coating layer according to the powder.

A Study on the Decision Factor N of the Tone Density (Tone농도의 Facter N 결정에 관한 연구)

  • 안석출
    • Journal of the Korean Graphic Arts Communication Society
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    • v.10 no.1
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    • pp.35-54
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    • 1992
  • Direct electrostatic coating method is simple, low cost and environmentally useful method. We are investigated on the coating of carrier transfer polymer layer on the carrier generate inorganic pigment layer using direct electrostatic coating method. The sample was obtained electrostatic deposite layer by fusing and calendering on the copper phthalocyanine. we could be found several polymer thin film shows good bond properties between film and pigment layer.

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Studies on the multi-layered coated paper(I) - The effect of pre-coated layer formulation on top coated layer properties - (다층 도공지에 관한 연구(I) - 프리코팅층의 안료배합이 탑층의 물성에 미치는 영향 -)

  • Lee, Myoung-Seok;Kim, Sun-Kyung;Cho, Byoung-Uk;Lee, Yong-Kyu
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2011.04a
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    • pp.251-263
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    • 2011
  • This study was carried out in order to investigate the effect of pre-coating layer on top-coating layer. The coated paper with five different formulations were prepared. The properties of coated paper were measured and correlation between pre and top-coated layer was evaluated. Paper gloss was increased with addition of clay and GCC that has smaller particle size. Roughness was decreased with using smaller particle GCC, clay and talc. The highest thickness was obtained with talc. Brightness and whiteness of pre-coated layer were affected to top-coated layer. GCC 60 shows the highest and ununiform water adsorption during 1sec. The adsorption was higher with increasing coated weight. Talc shows the excellent water adsorption properties due to its wettability. These results indicate that final printability and properties of top coating layer can be controlled with adjusting pre-coating layer.

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Effects of thickness and applied load on wear mechanisms of PMMA (Poly Methyl Methacrylate) coating layers (PMMA(Poly Methyl Methacrylate) 코팅층 두께 및 적용하중에 따른 마멸기구 분석)

  • Kang S. H.;Kim Y. S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2004.05a
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    • pp.152-155
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    • 2004
  • Effects of sliding speed, applied load, counterpart radius and thickness of PMMA (Poly Methyl Methacrylate) coating layers on their dry sliding frictional and wear behavior were investigated. Sliding wear tests were carried out using a pin-on-disk wear tester. The PMMA layer was coated on Si wafer by a sol-gel technique with two different thicknesses, $1.5{\mu}m\;and\;0.8{\mu}m$. AISI 52100 bearing steel balls were used as a counterpart of the PMMA coating during the wear. Normal applied load and sliding speed were varied. Wear mechanisms were investigated by examining worn surfaces by an SEM. Under most of sliding test conditions, the thicker layer with the thickness of $1.5{\mu}m$ showed lower fiction coefficient than the thinner layer. Effects of sliding speed and counterpart's radius on the frictional behavior were varied depending on the thickness of the coating layer.

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The Evaluation of STS304 Coating Layer on S45C Substrate by friction Surfacing Process. (S45C 모계에 대한 STS304 마찰 육성층 평가)

  • Noh, Joong-Suk;Cho, Houn-Jin;Kim, Heung-Ju;Chun, Chang-Gun;Chang, Woong-Seong
    • Proceedings of the KWS Conference
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    • 2005.06a
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    • pp.229-231
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    • 2005
  • Friction surfacing of STS304 consumable rod on S45C substrate was investigated by microstructural observation and mechanical tests. STS304 layer formed a strongly-bonded thick layer under a wide range of surfacing conditions. The hardness distribution showed the peak value in the boundry layer, while the highest coating efficiency obtained in the condition of 1000rpm-2.5mm/sec-2.5mm/sec. As the consumable rotation rate and the traveling rate increased, the coating efficiency tended to decrease. On the other hand, as the feeding rate increased, the coating efficiency appeared to be increased.

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Minimization of Porosity in Ceramic Coating on a Hydraulic Cylinder (유압실린더 세라믹코팅 기공률 최소화 방안)

  • Jung, Youngho;Moon, Seung-Jae;Yoo, Hoseon
    • Plant Journal
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    • v.6 no.4
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    • pp.63-71
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    • 2010
  • The best way to prevent the corrosion of piston rod is a selection of quality of the material and method of construction which minimize the porosity. The high velocity oxy fuel(HVOF) method, which generates lower porosity than existing plasma spray, was applied to ceramic laminated bond layer. Porosity percentage fell to bellow 2%, lower than that of plasma spray at 7%. Coating material of ceramic-coated main layer was selected as the $Cr_2O_3$ affiliation material, which is more dense than $Al_2O_3$ affiliation. To fill up the pores formed after the coating process, we sealed the bond layer and main layer. Sealing process was performed twice, once after the coating and once after the grinding. Upon the anti-corrosion test on the sealed sample and on the non-sealed sample, it is confirmed that the sealed sample was not corroded for 1,000 hours while the non-sealed sample was corroded within 48 hours.

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Effect of Heat Treatment Environment on the Microstructure and Properties of Kinetic Sprayed Tantalum Coating Layer (Kinetic Spray 공정으로 제조된 탄탈륨 코팅층의 열처리 분위기에 따른 미세조직 및 물성)

  • Lee, Ji-Hye;Kim, Hyung-Jun;Lee, Kee-Ahn
    • Journal of Powder Materials
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    • v.22 no.1
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    • pp.32-38
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    • 2015
  • The effect of heat treatment environment on the microstructure and properties of tantalum coating layer manufactured by kinetic spraying was examined. Heat treatments are conducted for one hour at $800^{\circ}C$, $900^{\circ}C$, and $1000^{\circ}C$ in two different environments of vacuum and Ar gas. Evaluation of microstructure and physical properties are conducted. High density ${\alpha}$-tantalum single phase coating layer with a porosity of 0.04% and hardness of 550 Hv can be obtained. As heat treatment temperature increases, porosity identically decreases regardless of heat treatment environment (vacuum and Ar gas). Hardness of heat treated coating layer especially in Ar gas environment deceases from 550 Hv to 490 Hv with increasing heat treatment temperature. That in vacuum environment deceases from 550 Hv to 530 Hv. The boundary between particles became vague as heat treatment temperature increases. Oxygen distribution of tantalum coating layer is minute after heat treatment in vacuum environment than Ar gas environment.

Flow Behavior of Thin Polymer Film by various patterns in Spinning Coating Process of Blu-ray Disc Cover layer (블루레이 디스크의 커버레이어 스핀 코팅 시 다양한 패턴에 따른 최적화된 폴리머 거동에 관한 연구)

  • Cho K. C.;Park Y. H.;Kim H. Y.;Kim B. H.;Lee B. G.;Son S. G.;Shin H. K.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2005.10a
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    • pp.467-471
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    • 2005
  • In this paper, experimental methods about the flow behavior of thin polymer film by various edge patterns in the spin coating process for stable cover layer coating of a blu-ray disc is described. The blu-ray disc, a next-generation optical disc format over 25GB, consists of a 1.1m thick substrate and a 0.1mm tick cover layer. Generally, cover layer on the blu-ray disc is made by the polymer spin coating process. However, it is hard to secure sufficient coating uniformity around the rim on the cover layer. In order to get the uniform thickness deviation and to minimize the bead around the rim, the edge of the disc substrate can be modified into various patterns, such as normal plain, trench, step and chamfer pattern, etc, around the rim on the disc and experimented with various parameters, such as surface tension, viscosity, coating time, temperature and rotation speed, etc. And the optimal shape of the rim was tried to get by 3 dimensional computer simulation of the polymer expulsion process.

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