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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean institute of surface engineering
Journal Basic Information
Journal DOI :
The Korean Institute of Surface Engineering
Editor in Chief :
Volume & Issues
Volume 47, Issue 6 - Dec 2014
Volume 47, Issue 5 - Oct 2014
Volume 47, Issue 4 - Aug 2014
Volume 47, Issue 3 - Jun 2014
Volume 47, Issue 2 - Apr 2014
Volume 47, Issue 1 - Feb 2014
Selecting the target year
Ultrasound Assisted Sn-Ag-Pd Activation Process for Electroless Copper Plating
Lee, Chang-Myeon ; Hur, Jin-Young ; Lee, Hong-Kee ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 275~281
DOI : 10.5695/JKISE.2014.47.6.275
An ultrasound-assisted Sn-Ag-Pd activation method for electroless copper plating was presented in this study. With this activation process, it was shown that the fine catalyst particles were homogeneously distributed with high density on the entire specimen. In addition, it was observed that incubation period occurred during the electroless plating step was decreased owing to the absorption of Ag which holds high catalytic activity. Resulting from the refinement and high densification of catalyst, the defect-free gap-fill was achieved within the 20x nm trench.
Plasma Surface Treatment of Aluminum Extrusion Die
Choi, In Kyu ; Lee, Su Young ; Kim, Sang Ho ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 282~286
DOI : 10.5695/JKISE.2014.47.6.282
Wear characteristic of the nitrided SKD61 which is a typical mold material using for the extrusion of Al6061 alloy was investigated. The surface of SKD61 was nitrided by salt bath and plasma processes. The thickness of surface nitride layer was about
. Reciprocating friction wear test conducted using pin on disk type indicated the plasma treatment followed salt bath has a lower friction coefficient and a smaller adhesive wear with Al6061 alloy. That was identified by the
which has a better wear resistance than FeN mainly formed by plasma nitriding.
Enhancement of Surface Diffusivity for Waviness Evolution on Heteroepitaxial Thin Films
Kim, Yun Young ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 287~292
DOI : 10.5695/JKISE.2014.47.6.287
The present study deals with a numerical analysis on the island growth of heteroepitaxial thin-films through local surface diffusivity enhancement. A non-linear governing equation for the surface waviness evolution in lattice-mismatched material systems is developed for the case of spatially-varying surface diffusivity. Results show that a flat film that is stable under constant diffusivity conditions evolves to form nanostructures upon externally-induced spatial diffusivity modulation. The periodicity of waviness can be controlled by changing the modulation parameters, which allows for generation of pattern arrays. The present study therefore points towards a post-deposition treatment technique that achieves controllability and order in the structure formation process for applications in nanoelectronics and thin-film devices.
The Effect of Heat Treatment on the Thermal Expansion Behavior of Electroformed Nano-crystalline Fe-42 wt%Ni Alloy
Lee, Minsu ; Han, Yunho ; Yim, Tai Hong ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 293~296
DOI : 10.5695/JKISE.2014.47.6.293
Fe-Ni has been of great interest because it is known as one of low thermal expansion alloys as various application areas. This alloy was fabricated by electroforming process, and effect of heat treatment on thermal expansion and hardness was investigated. Nano-crystalline structure of 13.3 - 63.5 nm in size was observed in the as-deposited alloy. To investigate the effect of heat treatment on grain growth and mechanical/thermal properties, we conducted hardness and coefficient of thermal expansion (CTE). From this, we confirmed these properties were varied by heat treatment. In this nano-crystalline alloy, we could observe abnormal behavior in thermal expansion between
. Additionally, an abrupt change in hardness has also been observed. However, once the grains grow up to micro-sized the mechanical and thermal properties mentioned above were stabilized similar to those of bulk alloys due to heat treatment.
gas sensing properties of UV activated ZnS nanowires at room temperature
Kang, Wooseung ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 297~302
DOI : 10.5695/JKISE.2014.47.6.297
ZnS nanowires were synthesized in order to investigate
gas sensing properties. They were grown on the sapphire substrate using ZnS powders. SEM (scanning electron microscopy) showed the diameter and length of the ZnS nanowires were approximately in the range of 50 - 100 nm and a few
, respectively. They were also found to be composed of Wurtzite- structured single crystals from TEM (transmission electron microscopy) analysis.
gas sensing performance of the ZnS nanowire was measured with electrical resistance changes caused by
gas with a concentration of 1-5ppm. The sensor was UV treated with an intensity of
to facilitate charge carrier transfer. The responses of the ZnS nanowires to the
gas at room temperature, treated with UV of two different wavelengths of 365 nm and 254 nm, are measured to be 124.53 - 206.87 % and 233.97 - 554.83%, respectively. In the current work, the effect of UV treatment on the gas sensing performance of the ZnS nanowires was studied. And the underlying mechanism for the electrical resistance changes of the ZnS nanowires by
gas was also discussed.
The Effect of Grain Size on the Stress Shift toward Tensile Side by Deposition Interruptions in Copper Thin Films
Lee, Seri ; Oh, Seungkeun ; Kim, Youngman ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 303~310
DOI : 10.5695/JKISE.2014.47.6.303
In this study, the average in-situ stress in metallic thin film was measured during deposition of the Cu thin films on the Si(111) wafer and then the phenomenon of stress shift by the interruption of deposition was measured using Cu thin films. We have observed the stress shift in accordance with changing amount of atom's movement between the surface and grain boundary through altering the grain size of the Cu thin film with variety of parameters. The grain size is known to be affected on the deposition rate, film thickness and deposition temperature. As a experimental results, the these parameters was not adequate to explain stress shift because these parameters affect directly on the amount of atom's movement between the surface and grain boundary as well as the grain size. Thus, we have observed the stress shift toward tensile side in accordance with the grain size changing through the interlayer deposition. From an experiment with inserting interlayer before deposit Cu, in thin film which has big grain size with high roughness, amount of stress movement is higher along direction of tensile stress after deposition that means, after deposition process, driving force of atoms moving in grain boundary and on the surface of the film is relatively higher than before.
Electrical Properties of ITO Thin Film Deposited by Reactive DC Magnetron Sputtering using Various Sn Concentration Target
Kim, Min-Je ; Jung, Jae-Heon ; Song, Pung-Keun ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 311~315
DOI : 10.5695/JKISE.2014.47.6.311
Indium tin oxide (ITO) thin films (30 nm) were deposited on PET substrate by reactive DC magnetron sputtering using In/Sn(2, 5 wt.%) metal alloy target without intentionally substrate heating during the deposition under different DC powers of 70 ~ 110 W. The electrical properties were estimated by Hall-effect measurements system. The resistivity of ITO thin film deposited using In/Sn (5 wt.%) metal alloy target at low DC power increased with increasing annealing time. However, they increased with increasing annealing time at high DC power. In the case of ITO (Sn 2 wt%), we can't find clear change in resistivity with increasing annealing time. However, carrier density and mobility showed difference behavior due to change of oxygen vacancy.
Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray
Kwon, Chang-Sup ; Lee, Sung-Min ; Oh, Yoon-Suk ; Kim, Hyung-Tae ; Jang, Byung-Koog ; Kim, Seongwon ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 316~322
DOI : 10.5695/JKISE.2014.47.6.316
With increase in demand for higher operating temperatures of gas turbines, extensive research efforts have been carried out to enhance the performance of thermal barrier coatings (TBCs) in the field of coating processing as well as materials. In this study, thermal barrier coatings in lanthanum/gadolinium zirconate system, which is one of the most promising candidates for replacing yttira-stabilized zirconia (YSZ) in thermal barrier coating applications, are fabricated via suspension plasma spray. Dense,
thick coatings of fluoritephase zirconate with modest amount of segmented microstructures are obtained by using suspension plasma spray with suspensions of planetary-milled mixture between lanthanum and/or gadolinium oxide and nano zirconia. These coatings exhibit thermal conductivities of 1.6 ~ 1.7 W/mK at
, which is relatively lower than that of YSZ.
Effect of Sealing Materials and Parameters on the Corrosion Resistance of HVOF-Sprayed CrC-NiCr Coatings
Jeong, Younghun ; Nam, Uk-Hee ; Byon, Eungsun ; Kang, Tae-Il ; Kang, Chung-Yun ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 323~329
DOI : 10.5695/JKISE.2014.47.6.323
Effects of sealant and sealing procedure on corrosion resistance of high velocity oxy-fuel (HVOF) sprayed coatings were studied. HVOF-sprayed CrC-20NiCr coatings were sealed using three commercial sealants based on phenolics and epoxy. Penetration depth of sealants, measured by fluorescent microscope technique, was between
depending on sealant, sealing condition or sealing procedure. It was found that sealing on rotation status was more effective than that on stationary specimen due to the Coriolis effect of fluid in pores of the coating. From the CASS results, corrosion resistance of properly sealed CrC-20NiCr coatings was equal to that of hexa-valent chromium plating.
The Study on the Corrosion Property of the Zn-Mg Alloy Coatings with Various Mg Contents using EIS Measurement
Bae, Ki-Tae ; La, Joung-Hyun ; Kim, Kwang-Bae ; Lee, Sang-Yul ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 330~334
DOI : 10.5695/JKISE.2014.47.6.330
In this study, the Zn-Mg alloy coatings with various Mg contents were deposited using an unbalanced magnetron sputtering process. Their surface microstructure, chemical composition, phase, and corrosion property were investigated. The microstructure of the Zn-Mg coatings changed from porous microstructure to dense one with increasing Mg contents in the coatings. As Mg contents in coatings increased, intermetallic phases such as
were detected from X-ray diffraction (XRD) results. The corrosion resistance of the Zn-Mg alloy coatings was investigated quantitatively using electrochemical impedance spectroscopy (EIS) measurement with 3.5% NaCl solution. The results of EIS measurement showed that the charge transfer resistance and the phase angle of the Zn-Mg alloy coatings were increased from
and from about
with increasing Mg contents from 5.1 wt.% to 15.5 wt.% in the coatings. These results demonstrate that the Zn-Mg coatings with increasing Mg contents showed an enhanced corrosion resistance.
A Study on the Weathering of RCD'S Housing
Kim, Chang-Hwan ; Shin, Jin-Yong ; Kang, Byung-Chul ; Kim, Sang-Mung ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 335~340
DOI : 10.5695/JKISE.2014.47.6.335
This study selected an outdoor RCD'S and verified behavior of change in the housing with time. Weathering tests were carried out as outdoor exposure test (90 degrees, 37 degrees) and laboratory test (xenon lamp), and the results were evaluated based on color difference, gloss, contact angle, and optical microscope. This study can provide basic data for standardization of development and performance evaluation on RCD'S housing products.
Effect of Electron Irradiation Energy on the Properties of GZO/SiO
Thin Films on Polycarbonate
Heo, Sung-Bo ; Park, Min-Jae ; Jung, Uoo-Chang ; Kim, Dae-Il ; Cha, Byung-Chul ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 341~346
DOI : 10.5695/JKISE.2014.47.6.341
Ga-doped ZnO (GZO) single layer and
bi-layered films were deposited on Polycarbonate(PC) substrate by radio frequency magnetron sputtering. Influence of the structural, electrical, and optical properties of the films was considered. We have considered the influence of electron irradiation energy of 450 and 900 eV on the stuctural, electrical and optical properties of
thin films. The optical transmittance in a visible wave length region increased with the electron irradiation energy. The electrical resistivity of the films were dependent on the electron's irradiation energy. The
films irradiated at 900 eV were showen the lowest resistivity of
. The film which was irradiated by electron at 900 eV shows 84.3% optical transmittance and also shows lower than contact angle of
in this study.
Synthesis of Single-Walled Carbon Nanotubes for Enhancement of Horizontal-Alignment and Density
Kwak, Eun-Hye ; Im, Ho-Bin ; Jeong, Goo-Hwan ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 347~353
DOI : 10.5695/JKISE.2014.47.6.347
We present a synthesis of single-walled carbon nanotubes(SWNTs) for enhancement of parallel-alignment and density using chemical vapor deposition with methane feed gas. As-purchased ST-cut quartz substrates were heat-treated and line-patterned by electron-beam lithography in order to grow SWNTs with parallel alignment. We investigated the effects of various synthesis parameters such as catalyst oxidation, reduction, and synthesis conditions in order to enhance both tube density and degree of parallel alignment. The condition of
of Fe catalyst film, atmospheric oxidation at
for 10 min, reduction under 400 Torr for 5 min, and growth at
under 300 Torr yields
, which is the highest tube density with parallel alignment. Based on the results of atomic force microscope and Raman spectroscopy, it was found that SWNTs have diameter range of 0.8-2.0 nm. We believe that the present work would contribute to the development of SWNTs-based flexible functional devices.
Endurance and Compatibility of Silicon Carbide as Fluidized Bed Reactor for Poly-silicon
Choi, Kyoon ; Seo, Jin Won ; Hahn, Yoon Soo ; Son, Min Soo ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 354~361
DOI : 10.5695/JKISE.2014.47.6.354
In order to utilize silicon carbide (SiC) as an inner part of fluidized bed reactor (FBR) for manufacturing poly-silicon, we have carried out the thermodynamic calculation on the overall reactions including poly-silicon synthesis and compatibility of SiC with FBR process. The resources of silicon included
and the thermodynamic yield of the FBR with MS, TCS and STC were compared each other with variable range of temperature, pressure and hydrogen to silicon ratio. The silicon yield of MS, TCS and STC were 100%, 28% and 4%, respectively, throughout the conventional FBR conditions. Silicon carbide having high hardness and strength showed strong resistance to granule collisions during the FBR process using a lab-scale reactor. And it also showed quite good compatibility with the typical FBR processes of MS and TCS resources.
Design and Fabrication of Dual Tip Si
Probe for Dip-pen Nanolithograpy
Kim, Kyung Ho ; Han, Yoonsoo ;
Journal of the Korean institute of surface engineering, volume 47, issue 6, 2014, Pages 362~367
DOI : 10.5695/JKISE.2014.47.6.362
We report the design, fabrication of a
probe and calculation of its mechanical properties for DPN(dip pen nanolithography), which consists of dual tips. Concept of dual tip probe is to employ individual tips on probe as either an AFM tip for imaging or a writing tip for nano patterning. For this, the dual tip probe is fabricated using low residual stress
material with LPCVD deposition and MEMS fabrication process. On the basis of FEM analysis we show that the functionality of dual tip probe for imaging is dependent on the dimensions of dual tip probe, and high ratio of widths of beam areas is preferred to minimize curvature variation on probe.