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Table of Contents | March, 2023  Vol. 61   No.3 Previous Issue | Next Issue | Archive
In this issue:

Research Papers
145 Effects of Applied Cathodic Current on Hydrogen Infusion, Embrittlement, and Corrosion-Induced Hydrogen Embrittlement Behaviors of Ultra-High Strength Steel for Automotive Applications
자동차용 초고강도 강재의 전기아연도금 시 음극전류 인가조건이 수소 유입, 취화 및 부식유기 수소취화 거동에 미치는 영향
Hye Rin Bang, Jin Sung Park, Sang Heon Kim, Tae Yeob Kim, Min-Suk Oh, Sung Jin Kim
방혜린, 박진성, 김상헌, 김태엽, 오민석, 김성진
Korean J. Met. Mater. 2023;61(3):145-156.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.145

The effects of the electrogalvanizing conditions (a combination of plating current and time) on hydrogen infusion, embrittlement, and corrosion-induced hydrogen embrittlement (HE) behaviors of ultra-high strength steel were examined. A range of experimental and analytical methods, including electrochemical impedance spectroscopy, hydrogen permeation, polarization, and slow strain rate test, were employed...... More

                   Web of Science 2  Crossref 1
157 Interfacial Layer Effect on the Adhesion of the Ultra-Hard Thick TAC Film Deposition
Sang-Won Lim, Jeung-Soo Huh
Korean J. Met. Mater. 2023;61(3):157-169.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.157

Carbon-based thin film tool coatings, such as diamond-like carbon (DLC), have excellent lowfriction and anti-sticking properties. These thin films are widely used for the cutting and machining of increasingly widely-used lightweight non-metallic and non-ferrous metal materials, as a part of countermeasures against global warming. However, non-metallic and non-ferrous metal materials..... More

170 Properties of Y2O3 Dispersion Strengthened W Fabricated by Ultrasonic Spray Pyrolysis and Pressure Sintering
초음파 분무 열분해와 가압소결로 제조한 이트리아 분산입자 강화 텅스텐의 특성
Eui Seon Lee, Youn Ji Heo, Ji Young Kim, Young-In Lee, Myung-Jin Suk, Sung-Tag Oh
이의선, 허연지, 김지영, 이영인, 석명진, 오승탁
Korean J. Met. Mater. 2023;61(3):170-174.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.170

The effects of fabrication method on the microstructure and sinterability of W-1 wt% Y2O3 were analyzed. W composite powders dispersed with Y2O3 particles were synthesized by the ultrasonic spray pyrolysis process or the ultrasonic spray pyrolysis/polymer solution process. A dense composite was fabricated by a combination of spark plasma sintering..... More

175 All-Solution-Processed OLEDs Using Printed Ag Electrodes and a PEI Bonding Layer
은 인쇄 전극과 PEI 접착 층을 사용한 용액공정 OLED
Cheol-Hee Moon
Korean J. Met. Mater. 2023;61(3):175-182.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.175

We demonstrated a bonding technology using polyethyleneimine (PEI) as a bonding layer between printed Ag electrodes and an emission material layer (EML) to fabricate all-solution-processed Organic LightEmitting Diodes (OLEDs). We manufactured Ag electrodes on a glass substrate by the screen printing method, which was bonded to another substrate with ITO..... More

                   Web of Science 1  Crossref 1
183 Synthesis, Characterization, and Electromagnetic Wave Absorbing Properties of La0.7Sr0.3MnO3
La0.7Sr0.3MnO3의 합성, 특성 평가 및 전자기파 흡수 특성
Jae Hee Heo, Young-Min Kang
허재희, 강영민
Korean J. Met. Mater. 2023;61(3):183-189.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.183

Perovskite manganese La0.7Sr0.3MnO3 (LSMO) powders were prepared by sol-gel synthesis and calcination in the temperature (T ) range of 500~1200 o C and their structures and electromagnetic (EM) wave absorption properties were investigated. X-ray diffraction (XRD) analysis revealed that the crystalline perovskite phase can be formed at T ≥ 600 oC...... More

                   Web of Science 1  Crossref 1
190 Fabrication of Ruthenium-Based Transition Metal Nanoparticles/Reduced Graphene Oxide Hybrid Electrocatalysts for Alkaline Water Splitting
루테늄 기반 전이금속 나노입자/환원된 산화그래핀 혼성체를 이용한 알칼리 수전해 촉매 합성
Eun Been Lee, Seung Geun Jo, Sang Jun Kim, Gil-Ryeong Park, Jung Woo Lee
이은빈, 조승근, 김상준, 박길령, 이정우
Korean J. Met. Mater. 2023;61(3):190-197.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.190

Green hydrogen has attracted significant attention as one of the future energy sources because no greenhouse gases are emitted during production and its energy density is much higher than fossil fuels. Precious metals such as platinum (Pt) and iridium (Ir)-based catalysts are commonly used for water splitting catalysts. However, because..... More

                   Crossref 2
198 The Mechanism behind the High Thermoelectric Performance in YbCd2-xMgxSb2
YbCd2-xMgxSb2 열전 합금의 열전 성능 증대 메커니즘 분석
Seung-Hwan Kwon, Sang-il Kim, Minsu Heo, Won-Seon Seo, Jong Wook Roh, Heesun Yang, Hyun-Sik Kim
권승환, 김상일, 허민수, 서원선, 노종욱, 양희선, 김현식
Korean J. Met. Mater. 2023;61(3):198-205.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.198

YbCd2Sb2 is a promising Zintl compound for waste heat recovery applications due to its low thermal conductivity, originating from its complex crystal structure. Many strategies such as alloying or doping have been suggested to further reduce the thermal conductivity of YbCd2Sb2 to improve its thermoelectric performance. However, the..... More

206 Electrical, Thermal, and Thermoelectric Transport Properties of Co-Doped n-type Cu0.008Bi2Te2.6Se0.4 Polycrystalline Alloys
Okmin Park, TaeWan Kim, Minsu Heo, Sang Jeong Park, Se Woong Lee, Hyun Kyu Cho, Sang-il Kim
Korean J. Met. Mater. 2023;61(3):206-212.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.206

Bi2Te3-based alloys have been extensively studied as thermoelectric materials near room temperature. In this study, the electrical, thermal, and thermoelectric transport properties of a series of Co-doped n-type Cu0.008Bi2Te2.6Se0.4 polycrystalline alloys (Cu0.008Bi2−xCoxTe2.6Se0.4, x = 0, 0.03, 0.06, 0.09 and 0.12) are investigated. The electrical conductivity of the Cu0.008Bi1.97Co0.03Te2.6Se0.4 (x =..... More

                   Web of Science 2  Crossref 2
213 Electronic Transport Properties of Bi2Te2.7Se0.3 Fabricated by Hot Extrusion
열간압출 공정으로 제조한 Bi2Te2.7Se0.3의 전기전도 특성
Jeong Yun Hwang, Rahidul Hasan, Kyu Hyoung Lee
황정윤, Rahidul Hasan, 이규형
Korean J. Met. Mater. 2023;61(3):213-217.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.213

Herein we report the optimized processing conditions of hot extrusion for fabricating an n-type Bi2Te2.7Se0.3 thermoelectric compound, with high electronic transport properties as well as improved mechanical reliability. We fabricated a Bi2Te2.7Se0.3 extrudate that was 3.8 mm in diameter and 700 mm in length by controlling the processing parameters of..... More

218 Development of Alternative Reductant using Biomass for Reducing CO2 in Ironmaking Process
제선공정 온실가스 저감을 위한 바이오매스 활용 대체 환원제 개발
Ga Eon Kim, Han Sang Oh, Jong Hyup Lee, Young Joo Park, Yu Bin Lee, Jae Hong Kwon, Byong Chul Kim
김가언, 오한상, 이종협, 박영주, 이유빈, 권재홍, 김병철
Korean J. Met. Mater. 2023;61(3):218-230.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.218

Technologies to reduce CO2 emissions in the steel industry have been actively developed since the early 1990s in order to deal with global climate change. In particular, the utilization of various types of biomass including wood, bamboo, grass, food and agricultural by-product are being attempted as carbon neutral fuels in..... More

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