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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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수소 분위기에서 Mg와 VCl
3
의 밀링에 의한 Mg의 수소 흡수 방출 특성의 향상
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송명엽, 이성호, 곽영준
Korean J. Met. Mater.
2021;59(10):709-717. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.709
Abstract
VCl
3
(vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH
2
, Mg was used as a starting material since Mg is cheaper than MgH
2
. Samples with a composition of 95 wt% Mg +.....
More
Crossref 5
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Ag 중간층 두께에 따른 Ti-doped In
2
O
3
/Ag/Ti-doped In
2
O
3
다층 유연 투명전극의 전기적, 광학적, 기계적 특성 연구
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최수현, 장진규, 김현진, 최재욱, 허성보, 김유성, 공영민, 김대일
Korean J. Met. Mater.
2021;59(8):545-550. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.545
Abstract
Transparent and conductive Ti-doped In
2
O
3
(TIO)/Ag/Ti-doped In
2
O
3
(TAT) multilayer films were deposited on colorless poly imide (CPI) substrates by direct current (DC) and radio frequency (RF) magnetron sputtering at room temperature. During deposition the thickness of both the top and bottom TIO layer was fixed at 30 nm, while the.....
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Web of Science 2
Crossref 2
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Korean J. Met. Mater.
2020;58(7):495-500. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.495
Abstract
This study examined the effect of alkalis on lyocell-based activated carbon fibres (ACFs) with high Brunauer-Emmett-Teller (BET) surface areas, using X-ray diffraction (XRD). Here, alkali treatments were conducted using 10 ~ 25 % NaOH and KOH on lyocell samples for 3 h at ambient room temperature. A secondary treatment with.....
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Korean J. Met. Mater.
2019;57(12):755-763. Published online 2019 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.755
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to.....
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Korean J. Met. Mater.
2019;57(10):663-672. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.663
Abstract
The dehydrogenation rates of graphene-added Mg (named Mg-5graphene) were very low at 573 K and 593 K. Ni was added to increase the dehydrogenation rates of graphene-added Mg. Samples (designated as Mg-2.5Ni-2.5graphene) with a composition of 95 wt% Mg + 2.5 wt% Ni + 2.5 wt% graphene were prepared by.....
More
Web of Science 7
Crossref 6
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RF 마그네트론 스퍼터링으로 증착한 산소 결핍 구조 TiO
2-x
박막 트랜지스터에 미치는 급속 열처리 온도의 영향
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김한상, 이재윤, 김성진
Korean J. Met. Mater.
2019;57(7):438-446. Published online 2019 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.7.438
Abstract
We investigated the effect of rapid thermal annealing (RTA) temperature report on oxygendeficient rutile TiO
2-x
thin-film transistors deposited by RF magnetron sputtering. Amorphous TFTs that use TiO
2-x
semiconductors as an active layer can be fabricated by low-temperature process and show remarkable electrical performance. The RTA post-annealing process provides greater production.....
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Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2019;57(6):390-395. Published online 2019 May 16
DOI:
https://doi.org/10.3365/KJMM.2019.57.6.390
Abstract
We demonstrate a synthetic route to high-quality Sn microcrystals using thermal chemical vapor deposition (CVD) in a hydrogen-reducing atmosphere. During thermal CVD with SnO2 powder, a mixture of Ar and H2 (4%) gases was used as a carrier gas to maintain a hydrogen reduction environment. Hydrogen maintained a reduction environment.....
More
Web of Science 2
Crossref 2
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ZnO/Ag/SnO
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적층박막의 두께 변화에 따른 전기적, 광학적 특성 연구
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김유성, 최진영, 박윤제, 최수현, 공영민, 김대일
Korean J. Met. Mater.
2019;57(5):324-327. Published online 2019 May 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.5.324
Abstract
ZnO/Ag/SnO2 (ZAS) tri-layer films were prepared on glass substrates via RF and DC magnetron sputtering, and then the influence of the thickness of the ZnO and SnO2 layers on the optical and electrical properties of the ZAS films was investigated. As deposited ZnO 50 nm/Ag 10 nm/SnO2 50 nm films.....
More
Web of Science 6
Crossref 7
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Korean J. Met. Mater.
2018;56(12):878-884. Published online 2018 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.12.878
Abstract
In the present work, we selected a polymer, polyvinylidene fluoride (PVDF), as an additive to improve the hydrogenation and dehydrogenation properties of Mg. 95 wt% Mg + 5 wt% PVDF (designated Mg-5PVDF) samples were prepared via milling in hydrogen atmosphere (reactive milling), and the hydrogenation and dehydrogenation characteristics of the.....
More
Crossref 5
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Korean J. Met. Mater.
2018;56(8):620-627. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.620
Abstract
In our previous work, samples with a composition of 95 wt% Mg + 5 wt% CMC (Carboxymethylcellulose, Sodium Salt, [C
6
H
7
O
2
(OH)
x
(C
2
H
2
O
3
Na)
y
]
n
) (named Mg-5 wt%CMC) were prepared through hydride-forming milling. Mg-5 wt%CMC had a very high hydrogenation rate but a low dehydrogenation rate. Addition of Ni to Mg is known to increase.....
More
Crossref 5
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Korean J. Met. Mater.
2018;56(8):611-619. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.611
Abstract
TaF
5
and VCl
3
were chosen as additives to enhance the hydrogen uptake and release rates of Mg. The total content of the additives was not more than 10 wt% since too high content reduces the fraction of Mg and thus the hydrogen storage capacity of the alloys. Samples with compositions.....
More
Crossref 7
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Korean J. Met. Mater.
2018;56(5):392-399. Published online 2018 May 8
DOI:
https://doi.org/10.3365/KJMM.2018.56.5.392
Abstract
The addition of CMC (Carboxymethylcellulose, Sodium Salt) may improve the hydriding and dehydriding properties of Mg since it has a relatively low melting point and the melting of CMC during transformation-involving milling may put the milled samples in good states to absorb and release hydrogen rapidly. Samples with compositions of.....
More
Crossref 6
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Korean J. Met. Mater.
2018;56(2):155-162. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.155
Abstract
In this work, MgH
2
, Mg
2
Ni, and Ni were added to Mg in order to improve the hydrogen-storage properties of Mg. A 84 wt% Mg + 10 wt% MgH
2
+ 5 wt% Mg
2
Ni + 1 wt% Ni sample (designated the Mg-based sample) was prepared by milling under a hydrogen atmosphere in.....
More
Crossref 1
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Korean J. Met. Mater.
2018;56(1):59-65. Published online 2018 Jan 1
DOI:
https://doi.org/10.3365/KJMM.2018.56.1.59
Abstract
In this work, Mg
2
Ni and Ni were added to MgH
2
in order to improve the hydrogen-storage properties of Mg. A 94 wt% MgH
2
+5 wt% Mg
2
Ni+1wt% Ni (named 94MgH
2
+5Mg
2
Ni+1Ni) sample was prepared by milling in a hydrogen atmosphere in a planetary ball mill for 5 h. The Mg
2
Ni was hydrided during.....
More
Crossref 8
C
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무기합성매질을 이용한 LiCl-KCl 공융염 내 희토류 핵종(Nd)의 포집 및 고화
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김나영, 은희철, 박환서, 안도희
Korean J. Met. Mater.
2017;55(6):419-426. Published online 2017 Jun 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.6.419
Abstract
In this study, neodymium (Nd) nuclides in LiCl-KCl eutectic salts were captured and solidified using a synthetic inorganic composite (Li
2
O-SiO
2
-Al
2
O
3
-B
2
O
3
), a process that allows the selective capture of Nd and fabrication of a composite with Nd captured from waste, without additional additives or mixing. The Nd nuclides in the LiCl-KCl.....
More
Material Analysis & Characterization
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Korean J. Met. Mater.
2017;55(1):67-71. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.67
Abstract
ZnO buffer layers were deposited on mica substrates using a sol-gel spin coating method. Then, a thin film of metallic Zn was deposited onto the ZnO buffer layer/mica substrate using a thermal evaporator, and the deposited Zn thin films were then thermally oxidized in a furnace at 500 ℃ for.....
More
Crossref 1
Optical Devices & Energy Materials
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Ca(OH)
2
를 이용한 레늄 산화물의 포집반응 특성 연구
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이태교, 은희철, 최정훈, 이기락, 한승엽, 박환서
Korean J. Met. Mater.
2017;55(1):53-59. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.53
Abstract
The objective of this study was to obtain basic data for trapping gaseous technetium (Tc) oxide generated from the voloxidation process in spent nuclear fuel pyroprocessing. Rhenium (Re) and Ca(OH)
2
were used as surrogates for the technetium and a trapping material, respectively. The trapping characteristics of rhenium oxide were investigated.....
More
Crossref 1
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Korean J. Met. Mater.
2016;54(12):916-924. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.916
Abstract
In this work, niobium (V) fluoride was selected as an additive to heighten the hydrogen sorption rates of Mg. Specimens of pure Mg, 5 wt% niobium fluoride－added Mg, and 10 wt% niobium fluoride-added Mg were prepared by planetary ball milling in hydrogen. The hydrogen sorption properties of the specimens were.....
More
Crossref 5
E
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Korean J. Met. Mater.
2016;54(10):775-779. Published online 2016 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.10.775
Abstract
Ti-doped In
2
O
3
(TIO) thin films were deposited on glass substrates by RF magnetron sputtering. The films were then annealed at 100, 200 or 300 °C for 30 min to investigate the effects of the annealing temperature on the films’ structural, electrical and optical properties. The films annealed at 200 °C.....
More
Crossref 1
Optical Devices & Energy Materials
P
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니켈실리사이드 상대전극을 이용한 염료감응형 태양전지의 물성 연구
K
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김광배, 노윤영, 최민경, 송오성
Korean J. Met. Mater.
2016;54(8):615-620. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.615
Abstract
Nickel silicide was used as a counter electrode to replace the Pt catalytic layer of a dye-sensitized solar cell (DSSC) device. 50 nm Si/ 50 nm Ni was formed on glass or quartz by sputtering, and nickel silicides were formed by vacuum heat treatments at 450 and 800 ℃ for.....
More
Crossref 2
S
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Korean J. Met. Mater.
2016;54(8):609-614. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.609
Abstract
The vapor phase transport (VPT) process is usually used for the growth of one-dimensional nanostructures rather than for film deposition. In this study, for the first time, we report on the fabrication and optical propeties of ZnO film produced by VPT combined with rapid heating. The X-ray diffraction results showed.....
More
Crossref 1
M
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W
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5
0
N
R
a
i
l
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to...
More
M
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5
0
N
R
a
i
l
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to...
More
M
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c
r
o
s
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u
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u
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W
e
l
d
e
d
5
0
N
R
a
i
l
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to examine the effects...
More
M
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L
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L
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e
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to...
More
M
i
c
r
o
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M
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u
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u
s
W
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l
d
e
d
5
0
N
R
a
i
l
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to...
More
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