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Table of Contents | August, 2023  Vol. 61   No.8 Previous Issue | Next Issue | Archive
In this issue:

Research Papers
545 Microstructural Evolution and Mechanical Properties According to Aging Conditions of Ti-5Mo-2Fe Alloy
Ti-5Mo-2Fe 합금의 시효처리 조건에 따른 미세조직 변화 및 기계적 특성
Hong-Min Kim, Se-Yeong Park, Dong-Geun Lee
김홍민, 박세영, 이동근
Korean J. Met. Mater. 2023;61(8):545-552.   Published online 2023 Jul 20
DOI: https://doi.org/10.3365/KJMM.2023.61.8.545

Beta-type titanium alloys have a low elastic modulus, excellent cold workability, and are widely used as implant materials. High strength is possible by forming a precipitation in the β-matrix via solution treatment and aging treatment. However, beta titanium alloys require a large amount of beta-stabilizing elements (Fe, Nb, Mo, Ta,..... More

                   Web of Science 1  Crossref 3
553 Localized Corrosion Behavior of UNS N07718 in a Solution Simulating a Diluted-sour Environment
UNS N07718의 묽은 사워(sour) 모사 용액 내 국부 부식 거동
Ye-Jin Lee, Jun-Seob Lee, Soon il Kwon, Jungho Shin, Young Tae Cho, Seok Kim, Je-Hyun Lee
이예진, 이준섭, 권순일, 신정호, 조영태, 김석, 이재현
Korean J. Met. Mater. 2023;61(8):553-560.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.553

The localized corrosion behavior of precipitation-hardened UNS N07718 was investigated by immersion tests in 6 wt% FeCl3 + 1.0 wt% HCl and the use of electrochemical techniques in a simulating solution of a diluted-sour environment of 25 wt% NaCl + 0.5 wt% CH3COOH. The Ti carbides and Nb-Mo carbides with..... More

                   Web of Science 1
561 Laser Cladding of Alloy 82 Powder for Corrosion Protection in Small Modular Reactors
소형원자로 내식성 향상을 위한 Alloy 82 분말의 레이저 클래딩 연구
Insung Choi, Won-Chan Jeong, Dan-Bi Song, Jeong Suh, Kwang-Hyeon Lee, Yongjai Kim, In-Chul Jung
최인성, 정원찬, 송단비, 서정, 이광현, 김용재, 정인철
Korean J. Met. Mater. 2023;61(8):561-572.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.561

There has been an increased demand for surface modification technologies to enhance corrosionresistance and wear-resistance. Among the representative surface coating technologies, laser cladding has attracted great attention because of its multiple advantages including low heat input, low dilution ratio, controllable clad height, etc. Recently, laser cladding has been considered as..... More

                   Crossref 1
573 Lab-scale Process Parameter Determination of a Two-stage DRI (direct reduced iron) Process Using Reformed COG (coke oven gas)
개질된 COG (coke oven gas)를 이용한 2단 DRI (direct reduced iron) 공정의 공정변수 결정
Min Jeong Ko, Su Young Kim, Jong-Oh Jo, Jae-Rang Lee, Yong Ha Kim, Yong Sun Won
고민정, 김수영, 조종오, 이재랑, 김용하, 원용선
Korean J. Met. Mater. 2023;61(8):573-580.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.573

On the road to carbon neutrality, a great deal of attention is being paid to emerging technologies such as the DRI (direct reduced iron) process. This study proposes a two-stage DRI process using reformed COG (coke oven gas), and determined optimal process parameters. The reduction and carbonization of Carajás iron..... More

581 Utilizing Dip-Coating to Fabricate Gate Dielectric and Semiconductor for Thin-Film Transistors
딥코팅 방법을 활용한 게이트 산화물 유전체 및 반도체 박막의 제조 및 박막트랜지스터 응용
Yongwan Kim, Young-Geun Ha
김용완, 하영근
Korean J. Met. Mater. 2023;61(8):581-588.   Published online 2023 Jul 20
DOI: https://doi.org/10.3365/KJMM.2023.61.8.581

The potential applications of advanced electronic materials in large-area, printable, and flexible electronics have generated significant interest. However, creating high-performance, low-voltage thin-film transistors (TFTs) for these applications remains difficult due to a lack of advanced gate dielectric and semiconductor materials that meet both ease-of-fabrication requirements and high electrical performance. In..... More

589 Improving the Electrical Properties of Zinc-Tin Oxide Thin-Film Transistors by Additive using Electrohydrodynamic Jet Technology
전기수력학 젯 기술을 이용한 아연-주석 산화물 박막트랜지스터에서 첨가제에 의한 전기적 특성 향상
Woon-Seop Choi, Young Jik Lee, Yong Jae Kim
최운섭, 이영직, 김용재
Korean J. Met. Mater. 2023;61(8):589-593.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.589

Oxide thin-film transistors (TFTs) are important semiconductor materials for display backplanes. To fabricate flexible displays, not only display modes but also TFTs are important. Flexible TFTs are especially needed for flexible displays, and related processes need to be developed. Printing is a good choice for the new fabrication of oxide..... More

594 Stretchable Energy Harvesting Device based on Thermoelectric Composite Films
열전 복합체 필름을 이용한 스트레쳐블 에너지 하베스팅 소자 개발
Cheol Min Kim, Kwi-Il Park
김철민, 박귀일
Korean J. Met. Mater. 2023;61(8):594-601.   Published online 2023 Jul 20
DOI: https://doi.org/10.3365/KJMM.2023.61.8.594

Thermoelectric energy harvesting has attracted a lot of attention for powering self-powered devices because of the potential to generate energy anywhere with a temperature difference. In particular, a stretchable thermoelectric generator (S-TEG) can be applied to the repetitively moving parts of a machine and even a human body. Herein, we..... More

602 Transition Metal Dichalcogenide WS2 Films Prepared with a Combination of Spin/Dip Coating and CVD
Woon-Seop Choi
Korean J. Met. Mater. 2023;61(8):602-607.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.602

Recently, transition metal dichalcogenides (TMDCs) with 2D structure have attracted interest due to their many unique optical and electrical properties. The primary preparation methods for 2D materials are chemical vapor deposition (CVD), exfoliation, and other vacuum technologies. Large-scale synthesis of WS2 via solution-process is rare due to the higher temperature..... More

608 Lattice Thermal Conductivities of Yb(Cd1-xMgx)2Sb2 Analyzed via Debye-Callaway Model
Debye-Callaway 모델 기반 Yb(Cd1-xMgx)2Sb2 열전 합금의 격자 열전도도 분석
Minsu Heo, Seung-Hwan Kwon, Won-Seon Seo, Sang-il Kim, Hyun-Sik Kim
허민수, 권승환, 서원선, 김상일, 김현식
Korean J. Met. Mater. 2023;61(8):608-615.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.608

YbCd2Sb2-based Zintl phases have been identified as promising materials for thermoelectric applications due to their high Seebeck coefficient and electrical conductivity. However, their high thermal conductivity limits their overall thermoelectric performance. To address this, Mg has recently been introduced as an alloying element at Cd atomic sites to reduce the..... More

                   Web of Science 1  Crossref 1
616 Electrochemical Characteristics of Elastic, Non-Polar Polyurethane-Based Polymer Gel Electrolyte for Separator-Less Lithium-Ion Batteries
Alloyssius E.G. Gorospe, Dongwoo Kang, Dongwook Lee
Korean J. Met. Mater. 2023;61(8):616-624.   Published online 2023 Jul 20
DOI: https://doi.org/10.3365/KJMM.2023.61.8.616

Lithium-ion batteries (LIBs) have undergone countless enhancements in the past decade, mainly improvements in the basic components: electrodes, electrolyte, and separator. The separator, which acts as a physical barrier between the two electrodes, does not directly participate in the charge and energy storage. However, it is involved in the safety, form..... More

625 Development of Numerical Analysis Model for New Magnesium Electrolysis Process Using COMSOL
COMSOL을 활용한 신 마그네슘 전해 공정 수치해석 모델 개발
MaeHyun Cho, Hyeong-Jun Jeoung, Jungshin Kang, Kunok Chang
조매현, 정형준, 강정신, 장근옥
Korean J. Met. Mater. 2023;61(8):625-631.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.625

Magnesium (Mg) has good physical properties including light weight, excellent specific strength and high stiffness, and Mg is used in many fields. But current production methods of Mg have disadvantages, such as the generation of sulfur oxide and chlorine gas. In this situation, The Korea Institute of Geoscience and Mineral..... More

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