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Korean J. Met. Mater.
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코팅층과 기판 사이의 부착강도 리뷰: 영향 인자, 부착 메커니즘 및 평가 방법
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조영래, 이동휘, 문성용, 김민중
Korean J. Met. Mater.
2025;63(12):1012-1021. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.1012
Abstract
Adhesion strength between coatings and substrates is a fundamental property. It determines the reliability, durability, and performance of coated materials in engineering applications. Coating technologies are widely used in semiconductors, displays, automotive, energy, and biomedical industries. However, there is still no universally accepted method to evaluate adhesion strength. This review.....
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Korean J. Met. Mater.
2025;63(12):997-1011. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.997
Abstract
The increasing transition to electric vehicles and new Euro 7 standards has intensified the focus on brake-derived particulate emissions. Current braking systems exhibit significant susceptibility to corrosion with an accelerated wear rate. This susceptibility highlights the need for materials that can maintain stable friction coefficients under various operating conditions. Therefore,.....
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Korean J. Met. Mater.
2025;63(12):986-996. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.986
Abstract
Au-ZnO nanostructures derived from zeolitic imidazolate framework-8 (ZIF-8) were rationally designed and investigated as highly efficient chemiresistive sensors for detecting H
2
S gas. The incorporation of Au nanoparticles markedly enhanced the sensing characteristics relative to pristine ZnO, delivering an extraordinary response of ~419.1 toward 10 ppm H
2
S at 200 °C—nearly two.....
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Korean J. Met. Mater.
2025;63(12):976-985. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.976
Abstract
Abstract Developing earth-abundant oxygen-evolution reaction (OER) electrodes that operate efficiently at practical current densities remains a challenge because NiFe layered double hydroxides (LDHs), which are among the most active non-noble catalysts in alkaline media, are limited by poor electronic conductivity, nanosheet restacking, and weak contact with current collectors. Herein, we.....
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패턴형 BaTiO
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/BaZnCoFe
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O
27
2층 흡수체의 구조 제어에 따른 광대역 전자기파 흡수 특성 연구
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허재희, 강영민, 이상민
Korean J. Met. Mater.
2025;63(12):955-967. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.955
Abstract
This study explores the electromagnetic (EM) wave absorption behavior of a bilayer structure comprising BaZnCoFe
16
O
27
-epoxy (BZCFO) and BaTiO
3
-epoxy (BT). BZCFO exhibits magnetic loss via ferromagnetic resonance (FMR) originating from BaZnCoFe
16
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27
particles, while BT provides high permittivity and dielectric loss due to the ferroelectric nature of BaTiO
3
particles. The composite samples.....
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온간 다중공형압연 이후 소둔된 CrMnFeCoNi고엔트로피 합금의 미세조직과 기계적 특성
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최지환, 정휘윤, 임진수랑, 이욱진, 이제인
Korean J. Met. Mater.
2025;63(12):937-945. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.937
Abstract
Designing novel high-entropy alloys (HEAs) with low stacking fault energy has been drawn significant attention for achieving a unique combination of high strength and ductility via transformation-induced plasticity (TRIP) mechanism. However, extensive work hardening of TRIP HEAs have led to the difficulties in metalworking, which required very high thermomechanical processing.....
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희생 템플릿을 이용한 CoMo-LDH 전극의 개발과 수소 발생 반응 특성 연구
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이성준, 구태우, 김인태, 박서현, 이우재, 김양도, 박유세
Korean J. Met. Mater.
2025;63(11):919-927. Published online 2025 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.11.919
Abstract
Water splitting is a highly promising approach for producing high-purity hydrogen using renewable energy sources, providing a sustainable and environmentally friendly pathway to carbon neutrality. Of the two half-reactions involved in water electrolysis, the hydrogen evolution reaction (HER) plays a particularly critical role, as it largely determines the overall energy.....
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건식 환원 및 습식 침출 공정을 이용한 아연 소광 분진으로부터 고순도 산화아연 제조
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김희선, 심선호, 진연호, 박태준, 김대원
Korean J. Met. Mater.
2025;63(11):896-904. Published online 2025 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.11.896
Abstract
Zinc oxide (ZnO) is a multifunctional material extensively used in ceramics, electronics, pigments, and pharmaceuticals. The increasing global demand for ZnO, coupled with growing environmental concerns, necessitates the development of resource-efficient and eco-friendly manufacturing methods. This study investigates a dry metallurgical approach for recovering high-purity ZnO powder from zinc ferrite-rich.....
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초저입열 싱글모드 파이버 레이저 및 CET 이론을 연계한 일방향응고 247LC 초내열합금의 국부 무균열 용접 메커니즘
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신민창, 천은준
Korean J. Met. Mater.
2025;63(11):887-895. Published online 2025 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.11.887
Abstract
In this study, we systematically investigated the mechanisms enabling localized solidification crack-free welding of directionally solidified (DS) 247LC superalloy using a single-mode fiber laser, with a particular focus on the correlation with the columnar-to-equiaxed transition (CET) theory. Welding was performed on a single DS grain under twelve conditions, varying heat.....
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Laser Powder Bed Fusion 공정으로 적층 제조된 Inconel 718 합금 격자 구조체의 압축 변형 거동에 미치는 격자 크기의 영향
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강태훈, Holden Hyer, Yongho Sohn, 이기안
Korean J. Met. Mater.
2025;63(11):863-872. Published online 2025 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.11.863
Abstract
This study investigates the mechanical behavior and deformation characteristics of Inconel 718 lattice structures with different unit cell sizes fabricated by laser powder bed fusion (LPBF). Two body-centered cubic (BCC) lattice structures with unit cell sizes of 2 mm (BCC 2) and 4 mm (BCC 4) were designed while maintaining.....
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NCM계 폐리튬이온 배터리에서 회수한 Black Mass의 CO(g)에 의한 환원거동
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이상엽, 황재호, 이소영, 손호상
Korean J. Met. Mater.
2025;63(10):820-827. Published online 2025 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.10.820
Abstract
The cathode active materials of lithium-ion batteries (LIBs) contain critical metals including Ni, Co, Mn, and Li. Since these metals are only produced in a few countries, it is necessary to recover them from spent lithium-ion batteries. The concentrated electrode materials of lithium-ion batteries are referred to as black mass.....
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Korean J. Met. Mater.
2025;63(10):812-819. Published online 2025 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.10.812
Abstract
In this study, we explore the potential of pulsed ultraviolet (UV)-assisted thermal annealing as an effective low-temperature processing technique for fabricating high-performance indium oxide (In
2
O
3
) thin films, with a particular emphasis on their application in thin-film transistors (TFTs). In
2
O
3
films were synthesized using a solution-based method, with indium nitrate hydrate.....
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Korean J. Met. Mater.
2025;63(10):779-787. Published online 2025 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.10.779
Abstract
This study investigates the fabrication and high-temperature time-dependent deformation of a multi-sheet stacked Ni-Cr-Al superalloy foam. The foam was produced by powder spraying to deposit alloying elements onto a pure Ni preform, followed by transient liquid phase sintering for homogenization and hot rolling for lamination and structural integrity. The fabricated.....
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GAN과 AutoML의 조합을 통한 박판 Fe-Si 합금의 자기 특성 예측 및 프로세스 최적화
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오지은, 박세민
Korean J. Met. Mater.
2025;63(9):743-755. Published online 2025 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.9.743
Abstract
In order to greatly increase the energy efficiency of the motor core of electric vehicles, commercial 0.5 mm non-oriented Si steel was re-rolled to a thin-gauge of 0.1 mm, which cannot be accomplished with commercial rolling. To maximize the flux density, a key factor affecting energy efficiency, the hysteresis AI.....
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Web of Science 1
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Ba(Zr
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(BZCY) 나노입자를 통한 고체산화물 연료전지(SOFC)의 성능 향상에 대한 연구
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이진구
Korean J. Met. Mater.
2025;63(9):718-723. Published online 2025 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.9.718
Abstract
The proton-conducting solid oxide fuel cell (P-SOFC) has been attracting attention because it offers low- temperature operation, which not only reduces management costs but also enhances durability for longterm operation. Ba(Zr
0.1
Ce
0.7
Y
0.2
)O
3-δ
>(BZCY) is a perovskite-structured oxide material with high protonic conductivity in wet environmental conditions. Despite this advantage, BZCY has poor.....
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HF-ERW의 용접 입열량 변화에 따른 용접기 발진 주파수 변화와 개재물 생성 거동의 관계
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하정우, 김성웅, 변우진, 손호상
Korean J. Met. Mater.
2025;63(9):700-710. Published online 2025 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.9.700
Abstract
In this study, High-Frequency Electric Resistance Welding (HF-ERW) phenomena were investigated by measuring variations in the oscillation frequency. Changes in welding phenomenon with welding power involve the formation of a narrow gap and the generation and movement of a bridge. These consequently affect the length of the current path. The.....
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폴리아닐린 코팅을 통해 전자밀도가 향상된 NiFe-LDH의 산소 발생 반응 활성에 대한 고찰
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김인태, 구태우, 박현기, 이우재, 김건휘, 박범경, 김양도, 박유세
Korean J. Met. Mater.
2025;63(8):621-629. Published online 2025 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.8.621
Abstract
Water electrolysis is an efficient and environmentally friendly hydrogen production technology that emits no greenhouse gases. However, its overall efficiency is significantly constrained by the high overpotential associated with the oxygen evolution reaction (OER), and this remains the bottleneck in water splitting. Among various OER catalysts, NiFe-layered double hydroxide (NiFe-LDH).....
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정종엽, 김성수, 김영석
Korean J. Met. Mater.
2025;63(8):606-620. Published online 2025 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.8.606
Abstract
This study investigated the effect of degree of ordering in Alloy 600 steam generator (SG) tube material on the initiation of primary water stress corrosion cracking (PWSCC), using a slow strain rate test (SSRT). The material was cooled in air from 1,100
o
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o
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o
C the cooling rate.....
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Korean J. Met. Mater.
2025;63(8):594-605. Published online 2025 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.8.594
Abstract
This study explores the influence of microwave (MW) irradiation time on the NO
2
gas sensing performance of ZnO nanoparticles (NPs). ZnO NPs were subjected to MW irradiation for 1, 3, 5, and 7 minutes to assess the effects of defect engineering via MW irradiation on their sensing behavior. Phase and.....
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레이저 비전도성 페이스트(LNCP) 소재 최적화를 통한 상온 레이저 압착 접합 (LABC) 기반 30 μm 피치 인터커넥션 신뢰성 향상
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이가은, 최광성, 엄용성, 최광문, 장기석, 신정호, 이찬미, 오진혁, 김성철, 문석환, 윤호경, 임솔이, 이승윤, 주지호
Korean J. Met. Mater.
2025;63(8):583-593. Published online 2025 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.8.583
Abstract
As the trend in advanced semiconductor packaging continues toward finer pitch and higher integration, bonding technologies are increasingly expected to meet stricter thermal and mechanical performance requirements. However, conventional methods such as Thermo-Compression Bonding (TCB) often lead to problems including thermal stress, long processing times and limitations of fine-pitch bonding......
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김홍민, 홍성준, 이동근
Korean J. Met. Mater.
2025;63(8):553-560. Published online 2025 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.8.553
Abstract
Cast β titanium alloys exhibit low mechanical properties and are therefore suitable for various thermomechanical processing methods, such as forging, hot rolling, and extrusion, before practical applications. Depending on β stability, different deformation mechanisms, including slip, stress-induced martensite (SIM), and twinning, can occur, leading to diverse mechanical properties. Thus, controlling.....
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컨볼루션 신경망과 결정소성유한요소해석을 이용한 성형한계도 예측
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이한준, 정재면, 오세혁, 김동규, 김지훈, 이호원
Korean J. Met. Mater.
2025;63(7):542-552. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.542
Abstract
This paper presents a novel deep learning (DL) approach to predict the forming limit diagrams (FLDs) of sheet metals, addressing the limitations of traditional experimental and numerical simulation methods. By utilizing orientation distribution function (ODF) data and crystal plasticity finite element (CPFE) results, an efficient DL prediction model was developed......
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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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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
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C), ferritic stainless steel with high Cr content is commonly used as the interconnect material. However,.....
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극저온용 고망간강 주조재의 열간 단조에 따른 미세조직 균질화 및 기계적 물성 향상
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이승희, 박지원, 김용래, 강신곤
Korean J. Met. Mater.
2025;63(7):483-493. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.483
Abstract
This study investigated the effects of a hot forging process on homogenizing the microstructure and enhancing the mechanical properties of high manganese steel (Fe-24M3n-3Cr-0.7Si-0.5C-0.4Cu wt%) cast specimens. Cast specimens exhibited coarse-grained microstructures with average grain sizes about 900 μm, significant elemental segregation of Mn and Cr in interdendritic regions, and.....
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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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Web of Science 1
Crossref 1
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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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NCM계 폐리튬이온 배터리에서 회수한 Black Mass의 Ar 분위기 중 환원거동
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황재호, 이상엽, 이소영, 손호상
Korean J. Met. Mater.
2025;63(6):430-436. Published online 2025 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.6.430
Abstract
With the growing demand for LIBs (lithium-ion batteries) for EVs (electric-powered vehicles), it will be important to recover valuable metals from spent lithium-ion batteries in the future. The black mass recovered from spent lithium-ion battery contains elements such as Li, Ni, Co, and Mn with C. The carbon in the.....
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Web of Science 1
Crossref 4
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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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