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Korean J. Met. Mater.
2025;63(7):515-530. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.515
Abstract
In this study, a high-performance gas sensing system is developed by integrating capacitive electrode-based sensing with volumetric analysis to quantitatively evaluate gas uptake and diffusivity from gas-enriched polymer specimens. The sensor system comprises two types of capacitive electrode configurations: (1) a dual semi-cylindrical electrode pair affixed to the outer surface.....
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디지털 광 조형 방식 세라믹 3D 프린팅 적용을 위한 질화규소 세라믹 제조 및 소결거동에 대한 연구
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이민호, 안종필, 소성민, 이재승, 김진우, 김택윤, 박주석, 이희수
Korean J. Met. Mater.
2025;63(7):507-514. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.507
Abstract
This study investigated the effects of sintering additives and sintering methods on the densification and mechanical properties of silicon nitride (Si
3
N
4
)-based ceramics for Digital Light Processing (DLP) 3D printing. The formation of dense sintered bodies was evaluated using both pressureless sintering and gas pressure sintering (GPS). X-ray diffraction (XRD) analysis.....
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SOFC 연결재 표면에 균일한 Co 코팅막 형성을 위한 전기도금 공정 조건과 미세조직
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이기영, 최재훈, 신한균, 이효종, 박현, 김정한
Korean J. Met. Mater.
2025;63(7):494-506. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.494
Abstract
Interconnects in solid oxide fuel cells (SOFCs) serve as electrical pathways between individual cells while also separating the fuel and air streams in each cell. For SOFCs operating at low temperatures (600 ~ 800
o
C), ferritic stainless steel with high Cr content is commonly used as the interconnect material. However,.....
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몰리브덴 기판상의 직접 금 도금을 위한 전처리 및 스트라이크 공정 최적화
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전유주, 김세일, 김양도, 이규환
Korean J. Met. Mater.
2025;63(7):475-482. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.475
Abstract
The pre-treatment and gold (Au) strike plating process are optimized in this study to enhance the adhesion strength of Au plating on molybdenum (Mo) substrates. Mo demonstrates exceptional high-temperature stability and mechanical strength. It is applied to various fields including aerospace, military, and electronics, either in its uncoated form or.....
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동축(coaxial) 레이저 열원을 활용한 와이어 에너지 제어 용착(LW-DED) 적층제조 공정의 개요와 연구동향
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김욱주, 김세훈, 강태후, 이종익, 정상희, 한지민, 이협, 이빈
Korean J. Met. Mater.
2025;63(6):462-473. Published online 2025 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.6.462
Abstract
Metal additive manufacturing (AM), often referred to as metal 3D printing, is a promising and widely adopted approach for fabricating intricate components without conventional molds or casting processes. Although powder-based metal AM processes have gained significant recognition for their ability to realize complex shapes, their cost remains a major barrier.....
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고온 압출 공정으로 제조된 Al3102 합금 납작관의 미세조직, 부식 및 기계적 특성
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황원구, 강태훈, 최호준, 신영철, 이승철, 이기안
Korean J. Met. Mater.
2025;63(6):453-461. Published online 2025 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.6.453
Abstract
This study systematically investigates the microstructure, mechanical, and corrosion properties of hot-extruded Al3102 alloy flat tube, with direct comparisons to as-cast equivalents. Microstructural analysis revealed that both materials primarily consist of an aluminum matrix, with widespread distribution of Al
6
(Mn,Fe)-type precipitates in their initial structures. The flat tube exhibited an average.....
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Korean J. Met. Mater.
2025;63(6):437-452. Published online 2025 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.6.437
Abstract
Gas sensors are crucial devices in various fields such as industrial safety, environmental monitoring, gas infrastructure including hydrogen use, and medical diagnostics. These sensors precisely measure the presence of gases on-site in different environments to ensure operational safety and efficiency. Designed for high sensitivity, stability, and reliability, gas sensors are.....
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Korean J. Met. Mater.
2025;63(6):410-420. Published online 2025 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.6.410
Abstract
The joining of Ni/Al dissimilar metals to exploit the synergetic effect between the unique properties of Ni and Al alloys has been studied for potential applications in various industrial areas. This study investigates the interfacial reaction between deposited AlSi10Mg and an Inconel 625 substrate during the laser direct energy deposition.....
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단결정 Ni기 초합금의 결정방위에 따른 수소 취화 민감도 평가
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윤희수, 다오반헝, 권휴상, 이지훈, 남승훈
Korean J. Met. Mater.
2025;63(5):389-398. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.389
Abstract
As demand for hydrogen, a clean energy source, has increased, hydrogen embrittlement caused by hydrogen penetration into materials has became a major challenge. This study evaluated the effect of crystallographic orientation on hydrogen embrittlement sensitivity, using single-crystal Ni-based superalloys that are used in hydrogen gas turbines. The two crystallographic orientations.....
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그린레이저를 이용한 리튬 이온 배터리 버스바 용접부의 응고균열과 성분 분포 상관관계
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유예지, Jeong-Hoi Koo, 강희신, 천은준
Korean J. Met. Mater.
2025;63(5):356-369. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.356
Abstract
This study investigates the solidification cracking susceptibility of Cu-Steel laser welds used for cylindrical lithium-ion battery busbars. The research utilized green laser technology with three distinct beam patterns: Linear, Spiral + Wobble, and Circular + Wobble. Additionally, Ni-P coating layers of varying thicknesses (10, 50, 100 μm) were applied to.....
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다이어프램 밸브용 Co계 초합금 냉간 압연재의 상온 인장 특성에 대한 강화 메커니즘 연구
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박정현, 송노건, 최재호, 강두홍, 이기안
Korean J. Met. Mater.
2025;63(5):319-329. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.319
Abstract
Cold-rolled Co-Cr-Ni alloy (Elgiloy) and Co-Ni-Cr alloy (SPRON 510) can be considered for diaphragm valve materials in gas valve systems. In this study, the effect of direct aging (DA) heat treatment on the tensile properties of Co-based alloys was investigated and the influence of microstructural changes on the tensile behavior.....
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열간 압연된 AZMX1100 합금의 기계적물성에 미치는 열처리 영향
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박태연, 최인철
Korean J. Met. Mater.
2025;63(4):305-317. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.305
Abstract
In this study, to investigate the evolution of microstructure and texture, as well as their effect on mechanical properties of AZMX1100 magnesium alloy, AZMX1100 plates were manufactured using the TRC (Twin roll casting) method, which is one of the continuous casting methods With TRC it is possible to reduce the.....
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수위의 이미지 분석 알고리즘을 이용한 충전제가 함유된 황가교 EPDM 고분자 복합체의 수소 기체 충전량 및 확산도 측정 방법
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이지훈, 전상구, 최명찬, 김승연
Korean J. Met. Mater.
2025;63(4):291-304. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.291
Abstract
In hydrogen refueling stations, polymer O-rings are used for high-pressure hydrogen containers and transfer pipes to prevent gas leakage. A technology has been developed to measure the hydrogen uptake and diffusivity of the polymer materials used in these O-rings. The process involves charging the polymer material with hydrogen under a.....
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2액실 바이폴라막 전기투석에 의한 폐 Na
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용액에서 NaOH 재생
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이영재, 서민혁, 안재우
Korean J. Met. Mater.
2025;63(4):281-290. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.281
Abstract
With the recent introduction of various environmental policies focused on carbon neutrality has made recycling a crucial task in the electric vehicle industry. In particular, the recycling of lithium-ion batteries, a critical component of EVs, is becoming increasingly important. The process of recovering valuable metals such as lithium (Li), cobalt.....
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방전플라즈마 소결법을 이용한 Al 분말 형태에 따른 열적 특성평가
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박범순, 양민혁, 박유균, 박현국
Korean J. Met. Mater.
2025;63(4):264-270. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.264
Abstract
In this study, a high-melting point element, flake type graphite (Gr.), was added to aluminum (Al) to improve the latter’s thermal properties. Al with different particle shapes, spherical, irregular and flake shape, was mixed with graphite. Al–50 vol.% Gr. powders were mixed by a shaking mixer and sintered under the.....
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Korean J. Met. Mater.
2025;63(3):203-209. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.203
Abstract
Organic ferroelectric field-effect transistors (Fe-FETs) are highly attractive for memory device applications because of their ability to read data without causing damage (nondestructive readout) and their excellent retention capabilities. These attributes make organic Fe-FETs an appealing alternative to their inorganic counterparts, which, while demonstrating superior memory performance for practical applications,.....
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인공시효 온도가 자연시효된 Al-Si-Mg 합금의 T6 거동에 미치는 영향
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손현우, 정재은, 조영희, 김수배, 이정무
Korean J. Met. Mater.
2025;63(3):197-202. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.197
Abstract
The artificial aging behavior of Al-Si-Mg alloy naturally aged for 1 hour and 7 days at room temperature was analyzed using hardness, DSC and TEM. The Al-Si-Mg alloy naturally aged for 7 days at room temperature showed a decrease in maximum hardness during artificial aging at 160
o
C compared to the.....
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Korean J. Met. Mater.
2025;63(3):186-196. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.186
Abstract
This study examines the influence of ZrO
2
on austenitic stainless steel 316 (ASS 316). Following the addition of varying weight percentages (0, 1, 2, and 3) of ZrO
2
to ASS 316 powder, the samples were ball-milled for a duration of 30 h and then subjected to vacuum hot-pressing (VHP) for.....
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Korean J. Met. Mater.
2025;63(2):168-176. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.168
Abstract
Water splitting is a sustainable method of hydrogen production that is crucial for achieving carbon neutrality. However, the high cost of green hydrogen remains a major challenge. One strategy to reduce costs is the use of non-precious metal catalysts, such as Co, which is known for its excellent catalytic properties......
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음이온 교환막 수전해용 니켈 기반 수소 발생 반응 촉매의 니켈 산화수 및 입자 크기에 따른 성능 트레이드 오프 연구
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이재훈, 김남인, 진송, 박준영, 하준석, 김치호, 이주영, 김양도, 최승목
Korean J. Met. Mater.
2025;63(2):161-167. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.161
Abstract
The development of green hydrogen through anion exchange membrane water electrolysis (AEMWE) is essential for achieving carbon neutrality. Developing non-precious-metal catalysts for the hydrogen evolution reaction (HER) is crucial for the commercialization of AEMWE. In this study, Ni-CeO
2
/C catalysts were synthesized via a co-precipitation method and a reduction heat treatment.....
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고질소 오스테나이트계 스테인리스강의 화학조성과 열처리 온도에 따른 석출거동 및 기계적 특성
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권기환, 김성훈, 조효행, 이진종, 하헌영, 이창훈, 정재석, 이태호, 강남현
Korean J. Met. Mater.
2025;63(2):143-151. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.143
Abstract
The precipitation behavior and mechanical properties of high-nitrogen austenitic stainless steels were investigated for various chemical compositions and solution treatment temperatures. For this study, Fe-22.1Cr-12.2Ni-5.1Mn-2.1Mo alloys with three different sets of Nb, V, and N contents were prepared, and two distinct solution treatment temperatures were applied. An increase in Nb.....
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수정 용접 횟수에 따른 HY100강 용접 열영향부의 기계적 성질과 미세조직 거동
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김도섭, 최정현, 최동현, 문병록, 박수길, 강남현
Korean J. Met. Mater.
2025;63(2):121-131. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.121
Abstract
The mechanical properties and microstructural behaviors of multiple–repaired welds were investigated in the heat affected zone (HAZ) of HY100 steels. Test coupons were prepared from flux cored arc welds at the same location of weldments that had been repaired one, three and five times. The multiple–repaired welding caused continuous high.....
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S 첨가 및 시효열처리에 의한 오스테나이트계 경량철강의 절삭성 변화에 관한 연구
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이창욱, 김경원, 이창훈, 박형권, 박성준
Korean J. Met. Mater.
2025;63(2):109-120. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.109
Abstract
Machining processes are crucial in industrial applications for shaping steel into specific structural products, and represent a significant portion of the product cost. However, the machinability of lightweight steel is poor, and it exhibits the characteristics of difficult-to-machine materials. This study investigated the effect of adding sulfur on the machinability.....
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Ti-5Mo-1Fe 합금의 준정적 및 동적 변형 시 변형 메커니즘 거동 분석
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이용재, 이재관, 이동근
Korean J. Met. Mater.
2025;63(2):102-108. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.102
Abstract
To evaluate the deformation mechanisms of Ti-5Mo-1Fe alloy, compression tests were performed at strain rates ranging from 10
-3
/sec to 3×10
3
/sec at room temperature. The results showed that Ti-5Mo-1Fe alloy exhibited different deformation mechanisms depending on the strain rate. Under quasi-static strain rates, the Stress-Induced Martensitic (SIM) transformation from the metastable.....
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Ce 첨가가 Ti-6Al-4V 합금의절삭성에 미치는 영향
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김나영, 이욱진, 박찬희
Korean J. Met. Mater.
2025;63(1):75-84. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.75
Abstract
Ti alloys are difficult to machine, accounting for 50-75% of the final component price, necessitating urgent improvements in machinability to increase their demand in several fields. This study found that adding small amounts of Ce (0.1-2.0wt.%) significantly improves the machinability of Ti-6Al-4V alloy. Here, we systematically analyzed microstructural changes due.....
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Korean J. Met. Mater.
2025;63(1):33-42. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.33
Abstract
The weldability and the relationship between microstructure and tensile properties at 298 and 110 K produced by laser-arc hybrid welding (LAHW) in high-Mn steel welds were thoroughly investigated. In the laser zone of LAHWs using filler wire, more Mn vaporization in the laser zone was observed than at the arc.....
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L
STS316L을 사용한 L-DED 적층 제조 공정에서의 분말 공급 밀도에 따른 기계적 물성 및 미세구조 변화
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정재호, 조민철, 이근호, 박이주
Korean J. Met. Mater.
2025;63(1):11-22. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.11
Abstract
Laser Directed Energy Deposition (L-DED) is a notable additive manufacturing method in which metal powder is sprayed through a nozzle and then consolidated layer by layer using a laser. Unlike other additive manufacturing processes, DED has fewer constraints on the size of the fabricated parts, making it advantageous for the.....
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유적지 출토 청동용기의 합금 조성과 제작기술 변화
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김소진, 김영도
Korean J. Met. Mater.
2024;62(12):996-1005. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.996
Abstract
The purpose of this study is to analyze the components and observe the microstructure of 98 bronze vessels excavated from the Korean Peninsula, where such vessels were widely used, to identify the alloy composition and manufacturing process of bronze artifacts by period. In addition, we attempted to confirm the changing.....
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상전이 및 점 결함에 의한 Fe
1-
x
Co
x
Se
2
합금의 열전특성 향상
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박현진, 김준수, 김세준, 서원선, 김현식, 김상일
Korean J. Met. Mater.
2024;62(12):972-980. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.972
Abstract
This study investigates the thermoelectric properties of Fe
1-
x
Co
x
Se
2
(
x
= 0, 0.25, 0.5, 0.75, and 1) alloys using theoretical modeling approaches. The Single Parabolic Band (SPB) model was employed to calculate band parameters such as density-of-states effective mass (
m
d
*), non-degenerate mobility (
μ
0
), weighted mobility (
μ
w
), and B-factor. As the alloying.....
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Korean J. Met. Mater.
2024;62(12):963-971. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.963
Abstract
Hydrogen sulfide (H
2
S) is a highly toxic and dangerous gas with a flammable and corrosive nature, making the development of reliable gas sensors for its detection vital. This study investigated the enhancement in H
2
S gas sensing performance of commercial SnO
2
powders after high-energy milling. SnO
2
powders were subjected to high-energy.....
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