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Korean J. Met. Mater.
2025;63(4):271-280. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.271
Abstract
This study investigates the application of a unidirectional pulsating traveling magnetic field (UPTMF) for the semi-continuous casting of high-strength aluminum alloy 7075 slabs (350×150 mm). The experimental setup involved a comparative analysis of direct chill (DC) casting and electromagnetic stirring (EMS) with a 5 Hz amplitude modulated U-PTMF and 22.5.....
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급속 응고 공정으로 합성한 MNiSn (M=Ti, Zr, Hf) 하프-호이슬러에서 Sb 도핑이 열전 특성에 미치는 영향
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박은진, 이승훈
Korean J. Met. Mater.
2025;63(4):243-250. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.243
Abstract
Among half-Heusler alloys, MNiSn (M = Ti, Zr, Hf) compounds have been extensively investigated due to their unique crystal structure and promising thermoelectric properties. However, forming the MNiSn half-Heusler single phase directly during the solidification process is challenging, necessitating a prolonged annealing step for homogenization. Rapid Solidification Processing (RSP) was.....
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Korean J. Met. Mater.
2025;63(3):231-241. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.231
Abstract
Numerous studies on machine learning-based creep life prediction using the creep data collected from various existing experimental data have been reported. Since the prediction of creep life is heavily influenced by the quality and integrity of the collected creep data, data preprocessing is required to eliminate physically inconsistent creep datapoints,.....
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Korean J. Met. Mater.
2025;63(3):217-223. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.217
Abstract
This study analyzed the physical properties of hydrogel lens prepared by photopolymerization and thermal polymerization using tretinoin (ATRA) as an additive to improve functionality, such as alleviating dry eyes and to impart antibacterial properties. In addition, we wanted to confirm the applicability of the ophthalmic material as a drug delivery.....
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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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CdS/CdSe 이종접합 구조 형성을 통한 광전기화학적 성능 향상
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허동규, 김정현
Korean J. Met. Mater.
2025;63(2):152-160. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.152
Abstract
The growing need for sustainable energy development has become a critical issue due to worsening environmental pollution and climate change. Among the various technologies, the photoelectrochemical technology has been recognized as one of the essential approaches for advancing sustainable energy production. Out of the semiconductor materials used in PEC systems,.....
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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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일방향 응고 니켈기 초내열합금에서 합금원소가 응고거동 및 주조성에 미치는 영향
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박상현, 구지호, 이재현
Korean J. Met. Mater.
2025;63(2):132-142. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.132
Abstract
IN792, a Ni-based superalloy, exhibits excellent mechanical properties at medium and high temperatures (600~900oC). However, it is known to be very susceptible to casting defects such as hot cracking and hot tearing during casting. This study investigated the effect of alloy elements such as Hf, Zr, and B on the.....
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벌크 비정질 Ti
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Cu
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Zr
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소재를 이용한 수술용 스칼펠(Scalpel) 제작의 최적화 조건분석
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박지니, 오정석, 이상엽, 정중희, 신동균, 박준식
Korean J. Met. Mater.
2025;63(2):95-101. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.95
Abstract
This study investigated the manufacturing conditions and properties of Ti
47
Cu
38
Zr
7.5
Fe
2.5
Sn
2
Si
1
Ag
2
amorphous bulk metallic glass (BMG) to examine its applicability for scalpels for medical use. Ti-base BMG alloys have excellent mechanical properties and biocompatibility, making them a suitable scalpel material. In this study, a vacuum suction casting method was used to.....
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구리 및 구리 합금의 산화 거동에 미치는 기압의 영향
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박준상, 김두원, 정일석, 최은애, 권세훈, 한승전
Korean J. Met. Mater.
2025;63(2):85-94. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.85
Abstract
This study investigated the effect of gas pressure and alloying elements on the oxidation behavior of copper. Copper alloys containing 1 wt.% of zinc, nickel, or manganese were cast using vacuum induction melting, followed by solution treatment at 400°C for 60 minutes. Oxidation were conducted at 700°C for 60 minutes.....
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n형 Mg
3
Sb
2-x
Bi
x
열전소재의 오믹접합층 형성을 위한 고상접합기술
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주성재, 장정인, 손지희, 박종호, 김봉서, 민복기
Korean J. Met. Mater.
2025;63(1):60-67. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.60
Abstract
N-type Mg
3
Sb
2-x
Bi
x
materials are expected to replace n-type bismuth telluride because they are more abundant in the Earth's crust and lower in cost. However, the metallization process of this material, which is essential to develop modules, has been relatively under-researched. According to the literature, one-step sintering process based on powder.....
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Korean J. Met. Mater.
2025;63(1):43-52. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.43
Abstract
Bismuth antimony telluride (Bi-Sb-Te)-based alloys remain the dominant choice for near-roomtemperature thermoelectric cooling applications. One of the most studied approaches to improve the thermoelectric performance of Bi-Sb-Te alloys has been a nanostructuring strategy, to suppress the lattice thermal conductivity. This study investigates the impact of incorporating reduced pyrolyzed Pd acetate.....
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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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슈퍼커패시터 전극 활용을 위한 Polyvinylidene Chloride-resin으로부터 CuO와 Tetrahydrofuran을 이용해 합성된 친수성 다공성 탄소의 율속 특성 향상
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홍이진, 전상은
Korean J. Met. Mater.
2024;62(12):981-988. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.981
Abstract
Carbon materials used as an electrode for aqueous supercapacitors should be synthesized with a porous structure and hydrophilic properties to facilitate the adsorption and desorption of electrolyte ions for charge storage. To enlarge the specific surface area, the porous morphology should contain micropores (diameter < 2 nm). Mesopores (diameter: 2.....
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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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고전류밀도 구리전해도금에서 폴리에틸렌글리콜 및 염화이온의 영향 연구
J
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윤준서, 우태규, 박일송
Korean J. Met. Mater.
2024;62(12):954-962. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.954
Abstract
To determine the effect of Polyethylene Glycol(PEG) and Chloride ions(Cl-) as additives during electroplating, this study used interaction plots of various characteristics of the electroplated Cu foils for analyses. Crystals of about 2 µm in size were observed on the surface of Cu electroplated in the electrolyte without PEG. When.....
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Crossref 1
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직접 에너지 적층법에 의해 용접된 Fe-Mn-Si계 형상기억합금의 미세조직, 회복응력 및 기계적 특성
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김태윤, 김도형, 이욱진, 김왕렬
Korean J. Met. Mater.
2024;62(12):935-943. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.935
Abstract
Direct Energy Deposition (DED) is one of the main methods of additive manufacturing in which a feedstock material in the form of powder or wire is delivered to a substrate while an energy source, such as laser beam or electron beam, is simultaneously applied to melt the feedstock. In addition.....
More
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Tert-butyl alcohol의 동결주조에 의한 방향성 기공 함유 TiO
2
다공체 제조
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이의선, 오승탁
Korean J. Met. Mater.
2024;62(12):929-934. Published online 2024 Oct 7
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.929
Abstract
The effect of freezing conditions on the pore structure of porous TiO
2
fabricated using a freeze casting process with tert-butyl alcohol slurry was investigated. The raw powder was heat treated to manufacture a porous body with stable shape by suppressing volume change induced by the phase transformation of TiO
2
powder......
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기계 학습 기반 흡착에너지 예측을 통한 암모니아 분해용 합금 촉매 탐색
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여병철, 정소윤, 김준수, 김동훈
Korean J. Met. Mater.
2024;62(11):920-927. Published online 2024 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.11.920
Abstract
Ammonia decomposition has gained significant attention as an eco-friendly method for hydrogen production because it creates no carbon dioxide emissions. While Ru catalysts are known for their high activity in ammonia decomposition, their high cost makes them uneconomical for commercial use. Therefore, it is essential to explore novel alloy catalysts.....
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제조공정에 따른 고려시대 청동용기의 미세조직과 기계적 특성 변화
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김소진, 김영도
Korean J. Met. Mater.
2024;62(11):911-919. Published online 2024 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.11.911
Abstract
Bronze vessels are manufactured using casting and forging techniques, and various microstructures can be observed depending on the manufacturing process. In this study, we confirmed mechanical properties and microstructural evolution in the manufacturing process by observing the microstructures and composition analysis of 18 bronze vessels in the Goryeo Dynasty excavated.....
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Korean J. Met. Mater.
2024;62(11):868-878. Published online 2024 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.11.868
Abstract
In this study, the electromagnetic (EM) wave absorption properties of a two-layered structure composed of La
0.7
Sr
0.3
MnO
3
-epoxy (10 wt.%) (LSMO) and SrFe
9.5
Co
1.25
Ti
1.25
O
19
-epoxy (10 wt.%) (SFCTO), both exhibiting distinct high-frequency magnetic and dielectric properties, were investigated using a High Frequency Simulation Software (HFSS) simulation tool. LSMO had a high dielectric constant (ε'.....
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Ni 825/A516-70N 클래드 판재의 용접 방법의 차이에 의한 기계적 특성 평가 및 예측
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황철홍, 오정석, 박지니, 조명우, 김선환, 유경훈, 김성웅, 김영주, 이상엽, 박준식
Korean J. Met. Mater.
2024;62(11):844-856. Published online 2024 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.11.844
Abstract
In this study, the microstructures and mechanical properties of different methods of FCAW (Flux-cored arc welding) + FCAW or FCAW + GTAW (Gas tungsten arc welding) welding on Ni825/A516-70N clad plate were investigated, using a double U groove angle on a laboratory scale. The amount of specimen deformation with FCAW.....
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Ta-10W 합금의 고온 마모 특성
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강태훈, 박정효, 김규식, 이기안
Korean J. Met. Mater.
2024;62(10):827-835. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.827
Abstract
This study investigated the high-temperature wear characteristics of Ta-10W alloy, composed of 90% tantalum and 10% tungsten, known for its high melting point, excellent corrosion resistance, and oxidation resistance. Wear tests were conducted using a ball-on-disc method with alumina balls at temperatures of 200°C, 400°C, 600°C, and 700°C. The results.....
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Web of Science 1
Crossref 1
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금속 용탕 탈성분법 공정에서 Mg 용탕에 첨가된 Al 합금원소가 Mg-Ti 복합재료의 미세조직에 미치는 영향
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장지은, 주수현, 박성혁
Korean J. Met. Mater.
2024;62(10):820-826. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.820
Abstract
This study investigates the effect of adding Al to Mg molten metal on the microstructural characteristics and hardness of Mg-Ti composites fabricated via a liquid metal dealloying (LMD) process. The addition of Al to the Mg melt significantly reduces the dealloying rate of Cu in a Ti
30
Cu
70
precursor during LMD......
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Korean J. Met. Mater.
2024;62(10):803-819. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.803
Abstract
Residual antibiotics in natural aquatic environments pose a critical threat to humans and other organisms. However, most sewage treatment plants fail to remove them. Photocatalytic nanomaterials can efficiently destroy these persistent organic pollutants in wastewater. In this study, we developed a series of cobalt-doped SrTiO
3
(Co-STO) catalysts with different doping.....
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소성변형을 거친 비스무스 텔루라이드 소결체의 열전특성 분석
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주성재, 손지희, 장정인, 민복기, 김봉서, 홍종간, 이대근, 김형모
Korean J. Met. Mater.
2024;62(10):796-802. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.796
Abstract
Bismuth telluride (Bi
2
Te
3
)-based alloys are widely used for thermoelectric cooling and power generation at low temperatures, and they are the only commercially available materials for thermoelectric applications below 500 K. The rhombohedral unit cell with a large
c/a
lattice constant ratio consisting of - Te-Bi-Te-Bi-Te- stacked layers inevitably brings about.....
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MLCC용 Ni 나노파우더의 소결 억제를 위한 W 나노파우더 첨가의 효과
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이준운, 민건식, 이성민, 안영규, 한흥남
Korean J. Met. Mater.
2024;62(10):777-786. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.777
Abstract
Multilayer ceramic capacitors (MLCCs) are essential fundamental components in electronic devices, enabling miniaturization and high capacitance for energy storage and filtering. A key focus in MLCC research is enhancing capacitance density, for which improving the connectivity of Ni internal electrodes is imperative. The primary cause of reduced electrode connectivity in.....
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