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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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파워 소자의 고속 다이 접합을 위한 5 um Cu@Sn 입자 기반 프리폼의 천이액상 소결접합 특성
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한병조, 조상호, 전강록, 이종현
Korean J. Met. Mater.
2024;62(1):12-21. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.12
Abstract
To ensure the high-temperature stability of a bondline under next-generation power devices such as SiC semiconductors, a die bonding test was performed by transient liquid-phase (TLP) sinter-bonding using a Sn-coated Cu (Cu@Sn) particle-based preform. Compared to the existing 20 min-bonding result using a 30 μm Cu@Sn particle-based preform, a 5.....
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소결온도 최적화에 의한 Mg
3
SbBi
0.99
Te
0.01
n형 소재의 열전특성 향상
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주성재, 손지희, 장정인, 김봉서, 민복기
Korean J. Met. Mater.
2023;61(10):785-792. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.785
Abstract
Mg
3
Sb
2
-based materials are promising candidates to replace n-type Bi
2
Te
3
for cooling and power generation at low temperatures. Generally, the thermoelectric performance of a material is sensitively affected by synthesis process parameters, and among them, sintering temperature (
T
s
) is a critical one. In this study, n-type Mg
3
SbBi
0.99
Te
0.01
polycrystalline samples were fabricated.....
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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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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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구영진, 이윤주, 이명현, 윤석영
Korean J. Met. Mater.
2022;60(9):685-693. Published online 2022 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2022.60.9.685
Abstract
With the development of additive manufacturing technology, many types of materials are being utilized, and methods of printing the materials and characteristics of their hydration properties are being studied in the fields of construction and biotechnology. Tricalcium silicate (C3S), which is used as a cement material or biomaterial, is a.....
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Pb(Bi1
-x
Sn
x
)
2
Te
4
(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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저온 소결 처리된 SnO
2
전자전달층을 가진 페로브스카이트 태양전지의 물성
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김호준, 이용욱, 오영준, 김광배, 송오성
Korean J. Met. Mater.
2022;60(7):545-550. Published online 2022 Jun 3
DOI:
https://doi.org/10.3365/KJMM.2022.60.7.545
Abstract
This study investigated the photovoltaic properties and microstructure of perovskite solar cells (PSCs) with an ITO/SnO
2
/perovskite/HTL/Au electrode configuration, developed with varying sintering temperatures (100~200°C). The goal was to use SnO
2
ink as the electron transport layer (ETL) by low-temperature sintering. TGA-DTA analysis was conducted to determine the optimum sintering temperature.....
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Web of Science 1
Crossref 2
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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 4
Crossref 6
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구영진, 이명현, 윤석영, 이윤주
Korean J. Met. Mater.
2022;60(4):321-328. Published online 2022 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2022.60.4.321
Abstract
3D printing technology has advanced rapidly over the last decade. However, for ceramic materials, drying and sintering steps are required after printing, and excessive shrinkage that occurs during these steps is a major factor that has hindered the development of the ceramic 3D printing technology. In this study, a non-sintering.....
More
Web of Science 1
Crossref 1
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소결 방법에 따른 WC-20wt%Co 초경합금의 인장 특성 및 피로 수명
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류성현, 조무근, 김경일, 노우람, 홍익제, 이광희, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(3):227-236. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.227
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging die and cutting tools. WC-Co cemented carbide is manufactured by liquid phase sintering (LPS), and a new sintering process for densification has been developed. In this study, cylindrical rod shaped tensile and.....
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Web of Science 2
Crossref 3
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Korean J. Met. Mater.
2022;60(3):180-187. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.180
Abstract
In this study, Ti-10Mo alloy powder and sintered bodies were successfully fabricated using a threestep process of acid/organic solvent cleaning, hydrogenation/dehydrogenation (HDH) of bulk Ti-Mo scrap, and pressureless vacuum sintering of the alloy powder. This process can be used to recycle valuable Ti alloy. And unlike remelting-based recycling processes, in.....
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Web of Science 1
Crossref 3
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Korean J. Met. Mater.
2022;60(1):68-75. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.68
Abstract
A copper (Cu) metal-ceramic filler composite with high thermal conductivity and a suitable thermal expansion coefficient was designed for application as a high-performance heat dissipation material. The purpose of the designed material was to utilize the high thermal conductivity of Cu while lowering its high coefficient of thermal expansion by.....
More
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텅스텐산암모늄 단계 생략 초경합금 슬러지 재활용 공정에 의해 제조된 텅스텐의 소결 및 경도 특성
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권한중, 신정민
Korean J. Met. Mater.
2022;60(1):53-61. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.53
Abstract
In this paper, we suggest a novel recycling process for hard metal sludge that does not use ammonium paratungstate. Ammonia, which in the conventional recycling process is essential for removing sodium and crystallized tungstate, was not used in the novel process. Instead of ammonia, acid was used to remove the.....
More
Web of Science 1
Crossref 2
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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 1
Crossref 2
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급속소결에 의한 WC-Graphene-Al 복합재료 제조 및 기계적 성질
I
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-
J
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S
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o
n
손인진
Korean J. Met. Mater.
2021;59(6):384-391. Published online 2021 May 26
DOI:
https://doi.org/10.3365/KJMM.2021.59.6.384
Abstract
Tungsten carbides are very attractive because of their superior properties, e.g., high thermal and electrical conductivities, high melting point, high hardness, and relatively high chemical stability. Tungsten carbides with a binder metal, for example Ni or Co, are mainly used to fabricate nozzles, molds and cutting tools in the composite.....
More
Web of Science 1
Crossref 1
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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 2
Crossref 2
M
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방전플라즈마 소결법에 의해 제조된 Cu-Ni-Zr-Ti 비정질 기지 복합재료의 미세조직 및 기계적 특성
D
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M
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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
S
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소결기 장입을 위한 미분광브리켓 제조에 대한 연구
J
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배종호, 김강민, 이경욱, 한정환
Korean J. Met. Mater.
2021;59(1):14-20. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.14
Abstract
In ironmaking, the optimal size of the iron ore charged into a blast furnace is generally 10-30 mm. Oversized ores, which have a smaller reaction surface area, are crushed, while undersized ores, which decrease permeability, undergo a sizing process before being charged into the blast furnace. Recently, however, iron ore.....
More
Web of Science 3
Crossref 2
M
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O
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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
R
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나노구조 Ta-ZrO
2
복합재료 합성과 급속소결
S
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-
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u
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K
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m
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I
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-
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김성은, 손인진
Korean J. Met. Mater.
2020;58(11):776-781. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.776
Abstract
ZrO
2
is a promising candidate for knee and hip joint replacements due to its excellent combination of low density, corrosion resistance and biocompatibility. Nevertheless, a low fracture toughness of pure ZrO
2
at room temperature limits its wider application in the industry. One of the most obvious ways to solve the.....
More
Web of Science 4
Crossref 5
P
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s
Fe 함량변화에 따른 텅스텐카바이드 초경소재의 특성평가
J
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-
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J
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-
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-
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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 6
Crossref 8
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초고온·고압 소결 공정으로 제조된 다결정 다이아몬드 컴팩트(PDC)의 VTL 마모 특성에 미치는 Co 제거의 영향
M
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-
S
e
o
k
B
a
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k
,
J
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-
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o
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K
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B
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백민석, 김지원, 박배건, 박희섭, 이기안
Korean J. Met. Mater.
2020;58(7):480-487. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.480
Abstract
Polycrystalline diamond compact (PDC) has excellent wear resistance, high impact resistance, superior fatigue properties, and has been used in the oil and gas drilling industries. This study investigated the effect of Co leaching on the microstructure, vertical turning lathe (VTL) wear properties of PDCs manufactured by high-temperature and high-pressure (HTHP).....
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Zn 도핑이 Cu
2
Se의 상전이 거동과 열전수송특성에 미치는 영향
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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,.....
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Web of Science 2
Crossref 2
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WC-BN-Al복합재료 급속소결 및 기계적 성질
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김성은, 홍수환, 손인진
Korean J. Met. Mater.
2020;58(7):453-458. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.453
Abstract
Tungsten carbides are quite attractive for their superior properties, e.g., high melting point, high hardness, high thermal and electrical conductivities, and relatively high chemical stability. Tungsten carbides with a binder metal, for example Co or Ni, are mainly used to produce cutting tools, nozzles and molds in the composite form......
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Web of Science 6
Crossref 7
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산화물 환원공정에 의해 제작된 n-형 Bi
2
Te
2.7
Se
0.3
화합물의 열전특성연구
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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,.....
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Web of Science 3
Crossref 4
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펄스 전류 활성 소결에 의한 4YSZ-BN 복합재료 제조와 기계적 성질
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조우진, 김성은, 오세훈, 손인진
Korean J. Met. Mater.
2019;57(12):764-770. Published online 2019 Nov 22
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.764
Abstract
4YSZ is generally used in fuel cells, oxygen sensors, hip and knee joint replacements and thermal barriers because of it excellent properties, including low density, high biocompatibility, good resistance against corrosion, hard phase and high melting point, and high ionic conductivity. However, 4YSZ with large grain has low resistance to.....
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Web of Science 1
Crossref 1
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고주파 유도 가열에 의한 나노구조의 Nb-Al
2
O
3
복합재료 제조와 기계적 성질
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김성은, 오세훈, 손인진
Korean J. Met. Mater.
2019;57(11):701-707. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.701
Abstract
Al
2
O
3
has a high Young’s modulus (380 GPa), a low density (3.98 g· cm
-3
), good high-temperature mechanical properties, biocompatibility and excellent oxidation resistance. Al
2
O
3
has been used for automotive, aerospace, bio-materials and various industrial applications. Despite its various merits, the low fracture toughness of the material below the brittle-ductile transition.....
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Web of Science 2
Crossref 1
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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.....
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Web of Science 5
Crossref 5
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AlN 기계적 성질에 미치는 BN 첨가 영향
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조우진, 오세훈, 손인진
Korean J. Met. Mater.
2019;57(5):310-315. Published online 2019 Apr 10
DOI:
https://doi.org/10.3365/KJMM.2019.57.5.310
Abstract
Aluminum nitride (AlN) has several attractive properties including high thermal conductivity, excellent electrical insulation, a thermal expansion coefficient close to that of Si and low density. Accordingly, it is considered a promising packing material and substrate for high power integrated circuits. However, its low fracture toughness at room temperature limits.....
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Web of Science 9
Crossref 8
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