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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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
An Evaluation on High Temperature Oxidation Resistance of EB-PVD Thermal Barrier Coatings
Kim, Jong-H. ; Jeong, Se-I. ; Lee, Ku-H. ; Lee, Eui-Y. ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 147~152
Failure mechanisms of electron beam physical vapor deposited thermal barrier coatings(EB-PVD TBCs) that occur during thermal cyclic oxidation were investigated. The investigations include microstructural degradation of NiCrAIY bond coat, thermally grown oxides(TGOs) along the ceramic top coat-substrate interface and fracture path within TBCs. The microstructural degradation of the bond coat during cyclic oxidation created Al depleted zones, resulting in reduction of NiAl and
-Ni solid solution phase. It was observed that the fracture took placed primarily within the TGOs or at the interfaces between TGOs and bond coat.
A Study on the Characteristics of Nanodiamond Films with the Gas Flow Control
Kim, Tae-Gyu ; Kim, Chang-Hoon ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 153~159
Nanodiamond films were deposited on Si substrate by introducing a time dependent on/off modulation of
flows in a vertical-type microwave plasma enhanced chemical vapor deposition system. Surface morphology and diamond quality of the film were investigated as a function of the on/off modulation time interval. The diamond nucleation density on the substrate was enhanced under low temperature and low pressure condition. In addition, the diamond nucleation density was enhanced by increasing the on/off modulation time interval. Enhanced diamond quality was noticeable under the condition of a longer on/off modulation time interval. It was suggested that the nanodiamond nuclei formed the cluster formation.
Properties of Ni-SiC Composite Coating Layers Prepared by Electroplating Method
Lee, Hong-Kee ; Son, Seong-Ho ; Lee, Ho-Young ; Koo, Seok-Bon ; Jeon, Jun-Mi ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 160~165
Ni-SiC composite coating layers were prepared by electroplating method and their deposition rate, codeposition of SiC, morphology, surface roughness, hardness, wear and friction properties were investigated. It was found that the deposition rate and the codeposition of SiC in the composite coating layer increased with increasing concentration of SiC in the solution only at the early stage. Both of them reached certain maxima and then decreased with increasing concentration of SiC. Rough surface was obtained with increasing codeposition of SiC, which is probably due to the agglomeration of the SiC particle in the vicinity of surface. Vickers hardness increased with increasing codeposition of SiC and heat treatment at
in air for 1 hour. Wear volume decreased with increasing codeposition of SiC and friction coefficient increased with increasing codeposition of SiC at the early stage, and it became almost constant. Such wear and friction behaviors are desirable for the practical application.
A Study on Characteristics of Surface Modified Polyimide Film by Wet Process
Koo, S.B. ; Lee, H.K. ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 166~172
Metallized Polyimide films are extensively used as base materials in microelectronics, optical and automotive applications. However it is difficult to deposit metals on those because of their structural stabilities. In this work, polyimide films are modified by a wet process with alkalinemetalhydroxide and additives to introduce functional groups. The surface molecular structures of polyimide are investigated using X-ray photoelectron spectroscopy(XPS), fourier transform infrared reflection spectroscopy(FTIR-ATR), atomic force micro-scopic(AFM). XPS spectra and FTIR spectra show that the surface structure of polyimide is converted into potassium polyamate. AFM image and AFM cross-sectional analyses reveal the increased roughness on the modified surface of polyimide films. As a result, it is shown that the adhesion strength between polyimide surface and electroless nickel layer is increased by the nano-anchoring effect.
Aluminizing of Incoroy 909 Alloy by Pack Cementation Method
Ahn, Jin-Sung ; Kwon, Soon-Woo ; Yoon, Jae-Hong ; Park, Bong-Gyu ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 173~178
Incoloy alloy 909 is an Fe-Ni-Co based superalloy that is attractive for gas turbine engine applications. The absence of chromium, however, makes the alloy more susceptible to oxidation in high temperature. To improve the oxidation resistance aluminizing was performed by high activity low temperature pack cementation process. Aluminizing condition was examined with different times and temperatures. Optimum aluminizing conditions were at the temperature of
for 20 hrs. In the optimized condition, the thickness of the aluminized layer was about
. Also, the aluminized layer made the alloy to increase the resistance to the corrosion.
HVOF Thermal Spray Coating of WC-Co for Durability Improvement of High Speed Spindle
Kim, K.S. ; Baek, N.K. ; Yoon, J.H. ; Cho, T.Y. ; Youn, S.J. ; Oh, S.K. ; Hwang, S.Y. ; Chun, H.G. ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 179~189
High velocity oxygen fuel(HVOF) thermal spray coating of WC-Co powder is one of the most promising candidate for the replacement of the traditional hard chrome plating and ceramics coating because of the environmental problem of the very toxic
known as carcinogen and the brittleness of ceramics coating. WC-Co micron and nano powder were coated by HVOF thermal spraying method for the study of durability improvement of the high speed spindle. Coatings were planned by Taguchi program for the four spray parameters of spray distance, flow rates of hydrogen, oxygen and powder feed rate. Optimal coating process was obtained by the studies of coating properties such as porosity, surface roughness, micro hardness, and micro structure. WC-Co micron and nano powder were coated on the Inconel 718 substrate by the optimal coating process obtained in this study. The wear behaviors were studied by the sliding wear tester at room temperature and at an elevated temperature of
for the application to high speed spindle. Sliding wear test was carried out for four most promising hard coatings of chrome coating, ceramics coatings such as
and HVOF Co-alloy T800 for the comparison of their wear behaviors. HVOF WC-Co coating was better than other coatings showing highest micro hardness of 1400 Hv and comparable friction coefficients with others. HVOF WC-Co coating is a strong candidate for the replacement of the traditional hard chrome plating for the high speed spindle.
Effects of Blasting and Acidic Treatment on the Corrosion Characteristics of Dental Implant Fabricated with Cp-Ti and Ti-6Al-4V Alloy
Moon, Young-Pil ; Choe, Han-Cheol ; Park, Su-Jung ; Kim, Won-Gi ; Ko, Yeong-Mu ;
Journal of the Korean institute of surface engineering, volume 39, issue 4, 2006, Pages 190~197
The effects of blasting and acidic treatment on the corrosion characteristics of dental implant fabricated with Cp-Ti and Ti-6Al-4V alloy have been researched by using electrochemical methods. The fabricated implants were cleaned and sandblasted by
powder and then acidic treatment was carried out in nitric acid solution. The surface morphology were observed using scanning electron microscope. The corrosion behaviors were investigated using potentiosat and EIS in 0.9% NaCl solution at
. The potentio-dynamic test in 0.9% NaCl indicated that the corrosion potential of blasting and acidic treated implant was lower than that of non treated implant, but current density was higher than that of non treated implant. From the cyclic potentiodynamic test results of Ti implant, the passivation current density of blasting and acidic treated implant slightly higher than that of non treated implant. From A.C. impedance test results in 0.9% NaCl solution, polarization resistance(
) value of blasting and acidic treated implant was lower than that of non treated implant. In case of blasting and acidic treated implant surface, the pits were observed in valley and crest of implant surface.