Go to the main menu
Skip to content
Go to bottom
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 30, Issue 6 - Dec 1997
Volume 30, Issue 5 - Oct 1997
Volume 30, Issue 4 - Aug 1997
Volume 30, Issue 3 - Jun 1997
Volume 30, Issue 2 - Apr 1997
Volume 30, Issue 1 - Feb 1997
Selecting the target year
Composition and magnetic ProPerties of CoFecu alloys according to electrolysis conditions
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 3~12
The composition, the preferred orientation and the magnetic properties of the CoFeCu alloys electrodepositen under various electrolysis conditions in sulfate baths ware investigated. As the D.C. current density increased, the Co content in alloy electrodeposits increased, while the Cu content decreased and Fe content remained content. The effect of magnetic field up to 300 Oe on the composition of alloys was negligible. The Cu content of the alloys deposited in pulse current increased noticeably with increasing off-time, while the Co and Fe content decreased. The coercivity of the alloys with 3.5 to 7.0wt.% Cu was 1.0 to 2.0 Oe, but increased noticeably above and below that composition. The application of magnetic field during deposition decreased the coercivity of alloys. The saturation flux density of the alloys with 3.5 to 5.0wt.% Cu was relatively high in the range from 16 to 20.7Gauss. The anisotropy field(HK) of the alloys deposited under the magnetic field(50∼300 Oe) ranged from 18 to 22 Oe. The alloys had fcc structure with (111) preferred orientation, whose distribution increased a little with increasing magnetic field.
Effects of Microstructure and Surface Oil Film on the Welding in Zr Electroplated steel
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 13~22
In order to investigate the effects of microstructure Oil film on the welding spatter in Zn electroplated steel, Zn electroplated surface and layer structure with USS-Paddition was observed using XRD, XPS and optical microscopy. Wettability of water drop on the Zn electroplated steel surface was measured using Z.Mei model. Oil absorption test was carried out using Oil pen. Morphology of spot welding and spatter with USS-P addition, applied current, and oil-spray or oil-without was observed using SEM and optical microscopy. Surface morphology of Zn electroplated steel showed finer structure as USS-P content increased. Wettabiliy on the Zn electroplated surface decreased with increasing USS-P content. Size of welding trace increased and spatter occured arround the welding part as applied current increased, whereas spatter disappeared as USS-P content increased and disappeared in case of oil spraying on the Zn electroplated surface.
Electrolytic Boronizing on Carbon Steels in Fused Slat of Borax and Sodium Chloride Mixture
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 23~32
The electrolytic boronizing on carbon steels in the mixture of
and NaCl was conducted at 750~
for 1~6 hours under 0.5A/
current density. The micorostructrure and microheredness of boronized layer was also studien. The effect of the additive such as
or NaOH on the formation of boronized layer was also investigated. The boronized layer were composed of two sublayers, i.e., FeB and
, which have tooth structure. the average layer thinknesses of the low carbon steel and SM45C boronized at
for 4hours were 153 and 138
, respectively. The thickness of the twosublayers was significantly increased with increasing boronizing temperature. To obtain a single
layer without FeB sublayer, the boronized materials ware homegenized at
for 4 hours. It was fount that the single layer with a microhardness Hv
1120 -1250 was formed. The calculated activation energies for formation of boronized layer on the low carbon steel and SM45C were 18.7 and 12.6 Kcal/mol, respectively.
A study on the effect of process parameters on the corrosion resistance of ion plated Tin films with Ti and Ni interlayers.
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 33~43
The effects of process parameters substrate such as substrate current and substrate temperature on the corrosion resistance of ion plated TiN film were investigated. TiN fims were deposited on speed steel on which Ti or Ni hed been previously evaporated. Dense TiN films could be obtained under higher substrate current(1A) and substrate temperature(
), whereas TiN films deposited with lower substances current(0.5A) and substrate temperature(
) showed porous structure. The corrosion resistances of high speed steel was considerably increased when dense TiN films had been formed on it. The effect of Ti and Ni interlayer on the increase of the corrosion resistance was also significant with dense TiN films, while there was little effect of interlayer on the corrosion resistance when TiN films were porous. the effect of interlayer on the corrosion resistance was more outstanding with Ti then with Ni, because Ti reacts more easily with oxygen to form an oxide layer, and it also shows higher resistance against chlorine containing corrosion media.
The Influence of Electrolytic Condition on Tunnel Etching and Capacitance Gain of High purity Aluminium Foil on capacitor
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 44~56
Influence of electrochemical etching conditions on capacitance gain of aluminium electrolytic on capacitor foil has been investigated by etching cubic textured high purity aluminum foil in dilute hydrochloric acid. Uniformly distributed etch pit tunnels on aluminum surface have been obtained by pretreatment aluminium foil in 10% NaOH solution for 5 minutes followed by electrochemical etching. Electrostatic capacitance of etched aluminium foil anodized to high voltage increased with the increase of current density, total charge, temperature and concentration of electrolyte up to maximum CV-value and then deceased. Election optical observation of the etched foil revealed that the density of etch of etch pits increased with the increase of current density and concentration of electrolyte. this increase of etch pit density enlarged of the increase of capacitance. However, abnormal high current density and high electrolyte concentration induced the local dissolution of the foil surface which resulted the decrease of foil capacitance.
Low-voltage cathodoluminescent Characteristics of ZnGa
: Mn phosphors
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 57~62
: Mn phosphors were synthesized by a thermal method and their low-voltage cathodoluminescent characteristics were examined for the field emitter display (FED) application. Low efficiency of
: Mn phosphors could be ascribed to the low penetration depth of into phosphors, which might results in charge accumulation on the phosphors screen. For increasing cathodoluminescent of
: Mn under low voltage excitation, wide band-gap oxide materials were added to the
: Mn powder. It is found that the luminance can be increased by 20%. Measurement of leakage current on the phosphor screen shows that the enhancement of low-voltage cathodoluminescent by additive materials is mainly due to the consumption of surface charges on the phosphor.
Thermal Annealing Effects on the Structural and Optical Properties of Sputtered TiO
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 63~68
The effects of the post-deposition annealing on the structural optical properties of sputtered
thin films were studied; annealing was carried out in air up to
for different duration. The results of the X-ray diffraction and the raman spectroscopy showed the annealing-condition dependent structural transformation of
films from the as-deposited amorphous phase to the anatase and rutil phases. The spectroscopic elliposometry was used to investigate the deposition-condition dependence of the as-deposted films optical constants and also the evolution of the optical constants correlated with the annealing-induced structural transformation.
Enaluation of Atmospheric Corrosin for Metals
Journal of the Korean institute of surface engineering, volume 30, issue 1, 1997, Pages 69~82