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Table of Contents | April, 2023  Vol. 61   No.4 Previous Issue | Next Issue | Archive
In this issue:

Review Paper
231 Review of Electro-catalysts Supported by Metal Oxides for Electrochemical Oxygen Reduction Reaction
금속 산화물 지지체를 이용한 산소환원반응에 대한 전기화학 촉매 연구 동향
Yoo-Jin Jo, Won Suk Jung, Boyoung Lim
조유진, 정원석, 임보영
Korean J. Met. Mater. 2023;61(4):231-241.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.231

Global warming and air pollution have forced greater attention to new energy sources to replace fossil fuels. Among several eco-friendly energy sources, polymer electrolyte membrane fuel cells have been increasingly investigated since they have zero emissions, high energy density, and high energy efficiency. Carbon-supported Pt catalyst is generally used for..... More

                   Web of Science 3  Crossref 2
Research Papers
242 Comparative Research on Corrosion Resistant Non-Skid Al and Al-3%Ti Coating Fabricated by Twin Wire arc Spraying
Twin wire arc spray 용사코팅 공정을 통해 제작된 내부식성 Al 및 Al-3%Ti 미끄럼 방지 코팅의 비교 연구
Hansol Kwon, Youngjin Park, Uk Hee Nam, Eunkyung Lee, Eungsun Byon
권한솔, 박영진, 남욱희, 이은경, 변응선
Korean J. Met. Mater. 2023;61(4):242-251.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.242

To ensure the lifetime of marine constructions and the safety of workers and pedestrians, corrosion protective non-skid coating is an effective solution. However, the conventional polymer-based coating has some limitations. In this study, newly-suggested Al and Al-3%Ti coatings were deposited on high strength low alloyed steel substrate using twin wire..... More

                   Web of Science 2  Crossref 2
252 Method of Suppressing Solidification Cracking by Laser Surface Melting and Epitaxial Growth Behavior for Directionally Solidified 247LC Superalloy
레이저 급속 표면용융에 따른 일방향응고 247LC 초내열합금의 에피택셜 성장 및 응고균열 억제 방안
Kyeong-Min Kim, Eun-Joon Chun
김경민, 천은준
Korean J. Met. Mater. 2023;61(4):252-260.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.252

In this study, the relationship between solidification cracking and epitaxial growth behavior with the high-speed laser surface melting of a directionally solidified 247LC superalloys was fundamentally and metallurgically investigated, to develop a successful welding procedure for the next generation of gas turbine blades. Under typical laser surface melting conditions (scan..... More

                   Web of Science 1  Crossref 2
261 Study on Solidification and Phase Transformation Behaviors in Ni-based Superalloy IN625
IN 625 초내열합금의 응고거동 및 상변태 온도 분석
Seonghyo Ham, Junho Park, Changyong Jo, Seungcheol Yang, Yunkon Joo, Jiho Gu, Jehyun Lee
함성효, 박준호, 조창용, 양승철, 주윤곤, 구지호, 이재현
Korean J. Met. Mater. 2023;61(4):261-268.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.261

The solidification and phase transformation behaviors of IN625 with low C and Fe were investigated through directional solidification and quenching experiments. The primary and secondary dendrite arm spacing decreased exponentially as the solidification rate increased, demonstrating good agreement with theoretical equations. The MC carbide formed at a constant temperature gradient..... More

                   Web of Science 2  Crossref 4
269 Solid-State Synthesis and Thermoelectric Performance of Cu3Sb1−yBIII ySe4 (BIII = Al, In) Permingeatites
Ho-Jeong Kim, Il-Ho Kim
Korean J. Met. Mater. 2023;61(4):269-276.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.269

Permingeatite (Cu3SbSe4) is a promising thermoelectric material with narrow bandgap energy and large carrier effective mass. However, doping is required to improve its electrical conductivity and thermoelectric properties. In this study, Cu3Sb1−y(Al/In)ySe4 doped with BIII-group elements (Al or In) at the Sb sites was synthesized using mechanical alloying followed by..... More

                   Web of Science 1  Crossref 1
277 Phase, Crystal Structure, and Thermoelectric Performance of Cubic Skinnerite Cu3Sb1-yFeyS3 Synthesized by Mechanical Alloying
Sang Jun Park, Il-Ho Kim
Korean J. Met. Mater. 2023;61(4):277-283.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.277

Skinnerite (Cu3SbS3) has recently attracted attention as a promising thermoelectric material because of its low thermal conductivity. In this study, we performed the solid-state synthesis of Fe-doped skinnerite Cu3Sb1-yFeyS3 (y = 0.02−0.06) using mechanical alloying and hot pressing, and examined the samples’ thermoelectric properties relative to Fe doping content. All..... More

284 Effect of Sulfur Contents in NiZnS Composite Photocatalysts on Solar Water Splitting
황 함량 변화가 NiZnS 복합광촉매의 태양광 물분해 효율에 미치는 영향
Joo Hyun Kim, Eun seon Kang, Jung Hyeun Kim
김주현, 강은선, 김정현
Korean J. Met. Mater. 2023;61(4):284-290.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.284

Solar energy is attracting much attention as an eco-friendly source for future energy needs. Herein, NiZnS photocatalysts were synthesized with a hydrothermal method at various sulfur contents. The ZnS material is widely used as a photocatalyst because of its high stability, low toxicity, and excellent charge separation characteristics. Nickel is..... More

                   Crossref 1
291 A Study on the History of Advances in Ancient Iron Making Based on Correlation of Oxides in Slag
슬래그 내 산화물의 상관관계로 보는 고대 제철 발전사 연구
Gwang Seob Oh, Won Seop Jung
오광섭, 정원섭
Korean J. Met. Mater. 2023;61(4):291-300.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.291

A lot of slag was produced by ancient production processes such as smelting, melting, and refining. Iron slag has information that can be used to determine the characteristics of the site, the iron-making process and manufacturing date, but there is a limit to reading information through visual observation and nondestructive..... More

                   Crossref 1
301 Effects of Cr Carbides Formation on the High Temperature Creep Property of Alloy 690 for Steam Generator Tube Material
증기발생기 전열관용 Alloy 690 소재의 크리프 특성에 미치는 탄화물 형성의 영향
Hyung Kyu Kim, Seokmin Hong, Jongmin Kim, Min-Chul Kim, Young-Kook Lee
김형규, 홍석민, 김종민, 김민철, 이영국
Korean J. Met. Mater. 2023;61(4):301-309.   Published online 2023 Mar 22
DOI: https://doi.org/10.3365/KJMM.2023.61.4.301

The creep properties of Alloy 690, used as a steam generator tube material in nuclear power plants, were evaluated at 650°C, 750°C, and 850°C. The parameters of creep life prediction models were derived using the Larson-Miller (LM), Manson-Haferd (MH), and Orr-Sherby-Dorn (OSD) models, to use as mechanical properties under a..... More

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