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Korean J. Met. Mater.
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방전 플라즈마 소결과 압축 성형 방법으로 제조된 알루미늄 다공체의 구조적, 기계적 특성 연구
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최승혁, 이상화, 정재길, 이석재, 안태영, 최유송, 손승배
Korean J. Met. Mater.
2024;62(7):533-541. Published online 2024 Jun 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.7.533
Abstract
Metal foam materials are used for various purposes including electrode materials, catalyst filters, and gas diffusion filters due to their porous structure. Increasing demand for metal foams has generated research to increase porosity as well as produce different pore sizes. The present paper illustrates a comparison of open-cell aluminum foams...
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방전플라즈마소결법을 이용한 구리-흑연 재료의 소결거동 및 열적 특성 평가
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양민혁, 박범순, 문형석, 박재철, 박현국
Korean J. Met. Mater.
2024;62(6):411-418. Published online 2024 May 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.6.411
Abstract
The use of heat dissipation materials in various field such as power semiconductor device, LED and microelectronic system. Therefore, there is a need for heat dissipation materials using copper (Cu) and graphite (Gr). These materials have high thermal conductivity. In particular, graphite has high thermal stability with a low coefficient.....
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방전 플라즈마 소결법으로 제조된, AlN-MgO 소결체의 미세구조와 열적, 기계적 특성
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모한첸, 정명진, 안정원, 신승용, 박윤휘, 김선래, 남수용, 이우재, 권세훈
Korean J. Met. Mater.
2024;62(5):367-376. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.367
Abstract
AlN-MgO composites with different compositions were prepared by spark plasma sintering, and the effects of their composition on their microstructure, thermal properties, and mechanical properties were systemically investigated. MgO compositions in the AlN-MgO composites were controlled from 20 to 80 wt%. The results indicated that a phase transition did not.....
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고에너지 볼 밀링을 이용한 분산강화된 Fe-TaC 합금분말의 소결거동 및 기계적 특성평가
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박범순, 이정한, 박재철, 홍성길, 박현국
Korean J. Met. Mater.
2024;62(3):163-170. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.163
Abstract
In this study, a high-melting point element, tantalum carbide (TaC) was added to improve the mechanical properties and the oxidation/corrosion resistance of Fe. The Fe-TaC composites were synthesized by high energy ball milling for the mechanical alloying of the non-equilibrium phase (Fe-Ta) and the homogeneous dispersion of TaC. Fe-TaC composite.....
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Web of Science 1
Crossref 1
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초음파 분무 열분해와 가압소결로 제조한 이트리아 분산입자 강화 텅스텐의 특성
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이의선, 허연지, 김지영, 이영인, 석명진, 오승탁
Korean J. Met. Mater.
2023;61(3):170-174. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.170
Abstract
The effects of fabrication method on the microstructure and sinterability of W-1 wt% Y
2
O
3
were analyzed. W composite powders dispersed with Y
2
O
3
particles were synthesized by the ultrasonic spray pyrolysis process or the ultrasonic spray pyrolysis/polymer solution process. A dense composite was fabricated by a combination of spark plasma sintering.....
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Web of Science 2
Crossref 2
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Korean J. Met. Mater.
2023;61(2):120-125. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.120
Abstract
In the present study, we analyzed the thermal and mechanical properties of Cu-graphite composites (CGCs) with spatially anisotropic graphite layers. These composites were fabricated using a combination of electroless plating and spark plasma sintering (SPS) processes. Thermal conductivities and thermal expansion coefficients of the composites were measured using differential thermal.....
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Web of Science 2
Crossref 2
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Pb(Bi1
-x
Sn
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)
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Te
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(0≤x≤1) 화합물의 열전수송특성 연구
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남우현, 임영수
Korean J. Met. Mater.
2022;60(8):587-592. Published online 2022 Jul 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.587
Abstract
In this study, the effect of Sb incorporation on the thermoelectric transport properties of tetradymite-type Pb(Bi
2-x
Sb
x
)Te
4
(0≤x≤1) compounds is presented. PbBi
2
Te
4
(x = 0) possesses a high electron concentration of ~1.6×10
20
/cm
3
at room temperature and exhibits n-type degenerate semiconductor behavior, in which electrical conductivity decreases and negative Seebeck coefficient increases.....
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산화물 환원공정에 의한 n형 Bi
2
Te
2.7
Se
0.3
화합물의 합성과 열전특성
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임영수, 박배건, 이길근
Korean J. Met. Mater.
2022;60(6):463-470. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.463
Abstract
We present a study on the synthesis of Bi
2
Te
2.7
Se
0.3
powders through an oxide reduction process and also on the effect of the oxide reduction process on the thermoelectric transport properties of the resulting Bi
2
Te
2.7
Se
0.3
compounds. Starting materials of Bi
2
O
3
, TeO
2
and SeO
2
were mechanical milled for homogeneous mixing, and then.....
More
Web of Science 6
Crossref 7
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고용 강화 금속 바인더(Co
1-x
W
x
) 적용을 통한 초경합금의 기계적 특성 향상
H
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K
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권한중
Korean J. Met. Mater.
2022;60(1):14-25. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.14
Abstract
The metallic binder in WC-Co hard metals was effectively strengthened using the solid solution phases of Co and W. These metallic phases of Co and W (Co
1-x
W
x
, x<1), which consist of two kinds of structures (FCC and HCP), were successfully formed by hydrogen reduction of milled oxides mixtures (Co
3
O
4
and.....
More
Web of Science 2
Crossref 2
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초음파 분무 열분해법으로 제조한 텅스텐 미세분말의 미세조직과 소결 거동
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조현희, 김정현, 이영인, 정영근, 오승탁
Korean J. Met. Mater.
2021;59(5):289-294. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.289
Abstract
The powder microstructure and sintering behavior of W prepared by ultrasonic spray pyrolysis and spark plasma sintering were investigated. Fine-grained W powders were synthesized by ultrasonic spray pyrolysis using an ammonium metatungstate hydrate solution and hydrogen reduction. The XRD analysis of the powder, pyrolyzed below 600
o
C, showed tungsten oxide.....
More
Web of Science 3
Crossref 3
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방전플라즈마 소결법에 의해 제조된 Cu-Ni-Zr-Ti 비정질 기지 복합재료의 미세조직 및 기계적 특성
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신다운, 민 홍, 이진규
Korean J. Met. Mater.
2021;59(5):281-288. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.281
Abstract
In the present study, Cu
54
Ni
6
Zr
22
Ti
18
bulk metallic glass composites were developed by spark plasma sintering(SPS) using gas atomized Cu
54
Ni
6
Zr
22
Ti
18
metallic glass powders and Ta powders. Metallic glass composites with Ta phase were fabricated by SPS. The successful consolidation of Cu
54
Ni
6
Zr
22
Ti
18
metallic glass matrix composites with the Ta phase was achieved.....
More
Web of Science 1
Crossref 2
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Korean J. Met. Mater.
2020;58(12):843-851. Published online 2020 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2020.58.12.843
Abstract
In this study, oxide (Y
2
O
3
)-embedded Ni particles were fabricated via a new process. The process involves the mechanical hydrogenation of Ni–Y alloy into Ni–YH
2
and the selective oxidation of Ni–YH
2
to Ni–Y
2
O
3
. The alloy powders were prepared for sintering by the mechanical alloying of a mixed powder. The powder was.....
More
Web of Science 1
Crossref 2
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Fe 함량변화에 따른 텅스텐카바이드 초경소재의 특성평가
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김주훈, 이정한, 장준호, 오익현, 홍성길, 박현국
Korean J. Met. Mater.
2020;58(8):533-539. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.533
Abstract
In this study, consolidated WC-Fe compacts as a function of Fe contents were fabricated by a spark plasma sintering method, following the mixed by the ball-milled powder. Fe among the metallic binders was added to WC enhance not only the driving force of sintering process but also suppressing the grain.....
More
Web of Science 8
Crossref 10
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Zn 도핑이 Cu
2
Se의 상전이 거동과 열전수송특성에 미치는 영향
S
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진승현, 임영수
Korean J. Met. Mater.
2020;58(7):466-471. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.466
Abstract
We report on the phase transition behavior and thermoelectric transport properties of Zn-doped Cu
2
Se. Cu
2
Se is comprised of nontoxic, low-cost and abundant elements, and has been attracting attention because of its very high thermoelectric performance,
ZT
, at high temperatures. Many studies have reported enhanced
ZT
in impurity doped Cu
2
Se, however,.....
More
Web of Science 2
Crossref 2
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산화물 환원공정에 의해 제작된 n-형 Bi
2
Te
2.7
Se
0.3
화합물의 열전특성연구
Y
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임영수, 박배건, 이길근
Korean J. Met. Mater.
2020;58(5):334-339. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.334
Abstract
We report the thermoelectric transport properties of n-type Bi
2
Te
2.7
Se
0.3
compounds prepared by oxide-reduction process. The oxide-reduction process is a recently developed method that can synthesize Bi2Te3-based compounds using only oxide starting materials, which is advantageous in terms of the diversity of the starting materials and cost efficiency. In this study,.....
More
Web of Science 3
Crossref 4
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Korean J. Met. Mater.
2019;57(9):609-616. Published online 2019 Aug 21
DOI:
https://doi.org/10.3365/KJMM.2019.57.9.609
Abstract
We employed spark plasma sintering (SPS) in the presence of sintering aids to fabricate high-quality Ho
3+
,Yb
3+
-co-doped Y
2
O
3
transparent ceramics suitable for use as a laser gain medium, and analyzed their microstructure and optical properties. Ho
3+
,Yb
3+
-co-doped Y
2
O
3
transparent ceramics with different contents of Yb
3+
were fabricated by SPS and exhibited high.....
More
Web of Science 5
Crossref 5
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용융방사법으로 제작된
p
-type 다결정 Si의 열전특성 연구
J
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선주형, 임영수
Korean J. Met. Mater.
2018;56(9):686-692. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.686
Abstract
Thermoelectric energy conversion has attracted much attention as an efficient and environment-friendly energy technology. Thermoelectric energy conversion performance is directly influenced by the figure of merit (
ZT
) of the thermoelectric material, however, most known thermoelectric materials with high
ZT
contain toxic and/or scarce elements. Herein, we report the thermoelectric properties.....
More
Crossref 1
1
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Journal Impact Factor 1.1