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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 39, Issue 6 - Dec 2006
Volume 39, Issue 5 - Oct 2006
Volume 39, Issue 4 - Aug 2006
Volume 39, Issue 3 - Jun 2006
Volume 39, Issue 2 - Apr 2006
Volume 39, Issue 1 - Feb 2006
Selecting the target year
Synthesis and Characteristics of New Quaternary Superhard Ti-Mo-Si-N Coatings
Jeon, Jin-Woo ; Hong, Seung-Gyun ; Kim, Kwang-Ho ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 245~249
In this study, ternary Ti-Mo-N and new quaternary Ti-Mo-Si-N coatings were synthesized on steel substrates(AISI D2) and Si wafers by a hybrid coating system of arc ion plating (AIP) using Ti target and d.c. magnetron sputtering technique using Mo and Si targets in
gaseous mixture. Ternary Ti-Mo-N coatings were substitutional solid-solution of (Ti, Mo)N and showed maximum hardness of approximately 30 GPa at the Mo content of
. %. The Ti-Mo-Si-N coating with the Si content of 8.8 at. % was a composite consisting of fine (Ti, Mo)N crystallites and amorphous
phase. The hardness of the Ti-Mo-Si(8.8 at. %)-N coatings exhibited largely increased hardness value of
GPa due to the microstructural evolution to the fine composite microstructure and the refinement of (Ti, Mo)N crystallites. The average friction coefficient of the Ti-Mo-Si-N coatings largely decreased with increase of Si content. The microstructures of Ti-Mo-Si-N coatings were investigated with instrumental analyses of XRD, XPS, and HRTEM in this work.
Effect of Hydrogen Partial Pressure Ratio on Electrical and Structural Properties of ZnO Thin Film
Lee, Sung-Hun ; Shin, Min-Geun ; Byon, Eung-Sun ; Kim, Do-Geun ; Jeon, Sang-Jo ; Koo, Bon-Heun ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 250~254
Effect of hydrogen partial pressure ratio on the structural and electrical properties of highly c-axis oriented ZnO films deposited by oxygen ion-assisted pulsed filtered vacuum arc at a room temperature was investigated. The hydrogen partial pressure ratio were
at 40% oxygen pressure ratio. The conductivity of ZnO:H films was increased from 1.4% up to 4.2% due to relatively high carrier mobility caused by improvement of crystallinity While the conductivity of ZnO:H films were decreased over than 4.2% and (0002) orientation was also deteriorated. The lowest resistivity of ZnO:H films was
at 4.2% of hydrogen pressure ratio. Transmittance of ZnO:H films in visible range was 85% which is lower than that of undoped ZnO films because of declined preferred orientation.
The Effect of Cu Reflow on the Pd-Cu Alloy Membrane Formation for Hydrogen Separation
Mun, Jin-Uk ; Kim, Dong-Won ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 255~262
Pd-Cu alloy membrane for hydrogen separation was fabricated by sputtering and Cu reflow process. At first, the Pd and Cu was continuously deposited by sputtering method on oxidized Si support, the Cu reflow process was followed. Microstructure of the surface and permeability of the membrane was investigated depending on various reflow temperature, time, Pd/cu composition and supports. With respect to our result, Pd-Cu thin film (90 wt.% Pd/10 wt.% Cu) deposited by sputtering process with thickness of
was heat-treated for Cu reflow The voids of the membrane surface were completely filled and the dense crystal surface was formed by Cu reflow behavior at
for 1 hour. Cu reflow process, which is adopted for our work, could be applied to fabrication of dense Pd-alloy membrane for hydrogen separation regardless of supports. Ceramic or metal support could be easily used for the membrane fabricated by reflow process. The Cu reflow process must result in void-free surface and dense crystalline of Pd-alloy membrane, which is responsible for improved selectivity oi the membrane.
Deposition of (Ti, Cr, Zr)N-
Thin Films by D.C. Magnetron Sputtering
Kim, Sun-Kyu ; Vinh, Pham-Van ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 263~267
As technology advances, there is a demand for development of hard solid lubricant coating. (Ti, Cr, Zr)N-
films were deposited on AISI H13 tool steel substrate by co-deposition of
with (Ti, Cr, Zr)N using a D.C. magnetron sputtering process. The influence of the
gas ratio, the amount of
in the films and the bias voltage on the mechanical and structural properties of the films were investigated. The highest hardness level was observed at the
gas ratio of 0.3. Hardness of the films did not change much with the increase of the
content in the films. As the substrate bias potential was increased, hardness level of the film reached maximum at -150 V. Surface morphology of these films indicated that high hardness was attributed to the fine dome structure.
Study on the Effect of Sputtering Process on the Adhesion Strength of CrZrN Films Synthesized by a Duplex Surface Treatment Process
Kim, M.K. ; Kim, E.Y. ; Lee, S.Y. ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 268~275
In this study, effect of sputtering on the plasma-nitriding substrate and before PVD coating on the microstucture, microhardness, surface roughness and the adhesion strength of CrZrN thin films were investigated. Experimental results showed that this sputtering process not only removed surface compound layer which formed during a plasma nitriding process but also induced an alteration of the surface of plasma nitrided substrate in terms of microhardness distribution, surface roughness. This in turn affected the adhesion strength of PVD coatings. After sputtering, microhardness distribution showed general decrease and the surface roughness became increased slightly. The critical shear stress measured from the scratch test on the CrZrN coatings showed an approximately 1.4 times increase in the adhesion strength through the sputtering prior to the coating and this could be attributed to a complete removal of compound layer from the plasma nitrided surface and to an increase in the surface roughness after sputtering.
Comparison of the Characteristics of Cu-Sn and Ni Pre-Plated Frames Prepared by Electro-Plating
Lee, D.H. ; Jang, T.S. ; Hong, S.S. ; Lee, J.W. ; Yang, H.W. ; Hahn, B.K. ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 276~281
In order to improve the performance of PPFs (Pre-Plated Frames), a PPF that employed a Cu-Sn alloy instead of conventionally used Ni was developed and then its properties were investigated. It was found that the electoplated Cu-Sn alloy layer was a mixture of uniformly distributed fine crystallites, resulting In better wettability and crack resistance than those of Ni PPF. Moreover, as in Cu/Ni/Pd/Au PPF, migration of copper atoms from the base metal to the top of the Cu/Cu-Sn/Pd/Au PPF surface was not found although the Cu-Sn layer itself contained considerable amount of copper. It was expected that, by using the newly developed Cu-Sn PPF, any possible heat generation and signal interrupt caused by an external electro-magnetic field could be reduced because the Cu-Sn layer was paramagnetic, i.e., nonmagnetic.
Kim, Ki-Ho ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 282~287
binary melts were measured by the capillary method over the range of their liquidus temperatures to about 1200K. The cell constant were determined by using pure water. The results obtained are summerized as follows: Viscosities were decreased with the content of NaCl for all over the composition range of binary melts. Composition - viscosity relation for the binary melts show a non-linear from the additivity line and the deviations shows a maximum at about 60 mol% NaCl. This suggests the existence of the complex ion of
in the melt. Activation energy for viscous flow of the binary melts decrease monotonously with the increasing content of NaCl.
The Effect of
Dispersoids on the High Temperature Oxidation of Ti-34wt%Al-1.5wt%Mn Alloys
Lee, Dong-Bok ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 288~294
Alloys of TiAl-Mn-(0, 5, 10)wt.%
were prepared by a powder metallurgical route, and their oxidation behavior was studied at 800, 900 and
in 1 atm of air. The scale formed on the alloys consisted of
oxides. During oxidation, Mn tended to diffuse outward, whereas oxygen diffused inward. The dispersoids of
, which segregated at the matrix grain boundaries, acted as a diffusion channel for cations and oxygen ions, nucleation sites for oxides, and vacancy annihilation sites.
increased the scale thickness, but improved the scale adherence.
Comparison of HVOF Thermal Spray Coatings of T800 and WC-Co Powders
Cho, T.Y. ; Yoon, J.H. ; Kim, K.S. ; Baek, N.K. ; Song, K.O. ; Youn, S.J. ; Hwang, S.Y. ; Chun, H.G. ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 295~301
Hard chrome plating has been used in surface hard coating over 50 years both for applying hard coating and re-building of worn components. Hard chrome plating solution and mist pollute environment with very toxic
(hex-Cr) known as carcinogen which causes lung cancer, High velocity oxy-fuel (HVOF) thermal spray coatings of WC base cermet and Co-alloy powders are the most promising candidates for the replacement of the traditional hard chrome plating. Surface properties, wear, and friction behaviors of micron size Co-alloy (T800) and micron size WC-l2Co (WC-Co) have been studied for the application as hard coatings. The temperature dependence of wear and friction behaviors of T800 and WC-Co have been investigated at the temperature of
for the application to high speed spindle.
Effects of Alloying Elements on the Surface Characteristics of Pb-Substrate for Battery
Oh, S.W. ; Choe, H.C. ;
Journal of the Korean institute of surface engineering, volume 39, issue 6, 2006, Pages 302~311
Nowadays the open-type lead-acid battery for vehicle use is being replaced with the sealed-type because it needs no maintenance and has a longer cycle life. Thus researches on this battery are being conducted very actively by many advanced battery companies. There is, however, a serious problem with the maintenance free(MF) battery that its cathode electrode has a limited cycle life due to a corrosion of grid. In this study, it was aimed to improve a corrosion resistance of the cathode grid which is commonly made of Pb-Ca alloy for a mechanical strength. For this purpose, various amounts of alloying elements such as Sn, Ag and Ba were added singly or together to the Pb-Ca alloys and investigated their corrosion behaviors. Batteries fabricated by using these alloys as cathode grids were subjected to life cycle test and their corrosion layers appeared at the interface between the grids and the active materials were carefully observed in order to clarify effects of alloying elements.