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이산화바나듐 나노플라워 구조 최적화를 통한 리튬-황 전지의 폴리설파이드 셔틀 효과 완화
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정수환, 최현준, 이상준, 이동박, 엄수윤, 문산, 윤종혁, 김주형
Korean J. Met. Mater.
2023;61(11):849-856. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.849
Abstract
With the rapid development of portable devices and Energy Storage Systems (ESS), secondary batteries with high energy density and high capacity are in great demand. Among various candidates, Lithium-sulfur (Li-S) batteries have been considered for next-generation energy devices given their high theoretical capacity (1675 mAh g
-1
) and energy density (2500.....
More
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탄소 팩 세멘테이션 (Pack cementation) 공정을 통한 상용 Ti-48Al-2Nb-2Cr 합금의 고온 내산화성 개선과 탄소 확산 경로 해석
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김동현, 최광수, 박준식, 이승훈
Korean J. Met. Mater.
2022;60(10):723-731. Published online 2022 Sep 29
DOI:
https://doi.org/10.3365/KJMM.2022.60.10.723
Abstract
γ-TiAl alloys have attracted interest as lightweight materials for structural applications at temperatures below 800
o
C. With recent improvements in microstrutural control of the γ-TiAl alloys, resulting in excellent creep properties and high temperature strength, their use can be extended to temperatures higher than 800
o
C. To increase.....
More
Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2021;59(11):802-812. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.802
Abstract
Silicon (Si) has a high theoretical capacity and low working potential vs. Li/Li
+
, and has been investigated as the most capable negative electrode material for lithium-ion batteries (LIBs). However, Si undergoes significant volume changes during the Li
+
alloying/ dealloying processes, leading to unstable cycle life and limiting its practical applicability.....
More
Web of Science 2
Crossref 2
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인장강도 600 MPa급 저탄소강 필렛 용접부의 저온균열과 미세조직에 따른 수소취성 민감성 및 수소확산 거동
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안형진, 이정훈, 박한지, 유재석, 정성욱, 박종민, 강남현
Korean J. Met. Mater.
2021;59(1):21-32. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.21
Abstract
Hydrogen flowing into a weld causes hydrogen embrittlement (HE), so to prevent cold cracks in the weld, HE must be suppressed. In this study, single-pass fillet weldments were fabricated using two different welding fillers with the same strength level as the American Welding Society standard. The specimen F-HNi, which had.....
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Web of Science 8
Crossref 7
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탄소함량이 자동차용 초고강도 철강소재의 부식 및 수소 확산 거동에 미치는 영향
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황은혜, 성환구, 김성진
Korean J. Met. Mater.
2018;56(8):570-579. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.570
Abstract
Recently developed ultra-strong GIGA STEEL exhibites superior mechanical properties, with a high tensile strength of more than 1.5 GPa and good impact toughness. Nevertheless, its application to auto parts has been severely restricted, mainly due to a substantial reduction in the resistance to hydrogen embrittlement (HE) induced by aqueous corrosion......
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Crossref 14
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Korean J. Met. Mater.
2018;56(5):366-374. Published online 2018 May 8
DOI:
https://doi.org/10.3365/KJMM.2018.56.5.366
Abstract
This study examined the effects of the Sn content in a pure active metal filler Ag-Cu-Ti for the brazing of a Cu/ Al
2
O
3
joint. The optimal content of Sn to effectively wet alumina was 5 wt%. The microstructure of the brazed joint showed the presence of an Ag-rich matrix and.....
More
Crossref 13
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전류밀도에 따른 플립칩 Sn-Ag 솔더 범프의 Electromigration 손상기구 분석
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김가희, 손기락, 박규태, 박영배
Korean J. Met. Mater.
2017;55(11):798-805. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.798
Abstract
The effect of current densities on the electromigration (EM) failure mechanism of flip chip Cu/Ni/Sn-Ag/Cu solder bumps was investigated under stressing conditions at current densities ranging from 5.0~6.9 × 10
3
A/cm
2
at 150 ℃. The EM failure times at 5.0 × 10
3
A/cm
2
were around 11 times longer than at.....
More
Crossref 1
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알루미늄-구리 이종 도체 접합부에서 직류 전기 인가에 따른 금속간화합물의 성장 거동
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김정익, 진성우, 정진욱, 성현민, 정혜진, 박시욱, 박주원, 한흥남
Korean J. Met. Mater.
2017;55(6):372-378. Published online 2017 Jun 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.6.372
Abstract
Aluminum conductors are increasingly replacing copper because Al has lower cost and lighter weight, and consequently the demand for Al-Cu joints for industrial applications is growing. However, an intermetallic compound is known to grow at the Al-Cu interface, and will result in fracture if it grows above a critical thickness......
More
Crossref 2
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침입형 탄소 확산을 이용하여 제조한 고강도 Ti 합금
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김보영, 고세현, 이재철
Korean J. Met. Mater.
2017;55(5):342-347. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.342
Abstract
Feasibility studies are performed to determine the suitability of a novel simple synthesis technique for fabricating a new Ti alloy with improved strength and ductility, while exhibiting lower cell toxicity. Through consolidating pure Ti powders under a C atmosphere at elevated temperatures, a bulk form of the Ti alloy, in.....
More
Crossref 1
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확산접합된 Ni기 합금 Hastelloy X에 미치는 후열처리 영향
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사인진, 황종배, 홍순익, 김응선, 김민환
Korean J. Met. Mater.
2017;55(2):115-124. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.115
Abstract
The effect of post-bond heat treatment (PBHT) on diffusion-bonded polycrystalline Ni-base alloy Hastelloy X (Ni-22Cr-18Fe-8Mo) was evaluated in this study. Diffusion bonding was conducted under a compressive pressure of 14 MPa in the temperature range of 1100-1200 ℃. While (Cr,Mo)-rich and (Mo,Si)-rich precipitates were developed along the interface at 1100.....
More
Crossref 3
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Cu foam / Cu plate 간 고상확산접합부의 인장성질에 미치는 접합압력과 유지시간의 영향
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김상호, 허회준, 윤태진, 강정윤
Korean J. Met. Mater.
2016;54(12):899-907. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.899
Abstract
Open cell Cu foam, which has been widely utilized in various industries because of its high thermal conductivity, lightweight and large surface area, was successfully joined with Cu plate by diffusion bonding. To prevent excessive deformation of the Cu foam during bonding process, the bonding pressure should be lower than.....
More
Crossref 1
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Journal Impact Factor 1.2
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