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Research Papers
163 Sintering Behavior and Mechanical Properties of Dispersed-Reinforced Fe-TaC Composites Produced by High Energy Ball Milling
고에너지 볼 밀링을 이용한 분산강화된 Fe-TaC 합금분말의 소결거동 및 기계적 특성평가
Bum-Soon Park, Jeong-Han Lee, Jae-Cheol Park, Sung-Kil Hong, Hyun-Kuk Park
박범순, 이정한, 박재철, 홍성길, 박현국
Korean J. Met. Mater. 2024;62(3):163-170.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.163

In this study, a high-melting point element, tantalum carbide (TaC) was added to improve the mechanical properties and the oxidation/corrosion resistance of Fe. The Fe-TaC composites were synthesized by high energy ball milling for the mechanical alloying of the non-equilibrium phase (Fe-Ta) and the homogeneous dispersion of TaC. Fe-TaC composite..... More

171 Development of Highly Machinable Ti Alloy with Exceptional Tensile Properties by Er Alloying Element Addition
Er 합금 원소 첨가를 통한 인장 물성과 절삭성이 우수한 Ti 합금 개발
Yi Seul Choi, Jeong Mok Oh, Chan Hee Park, Wook Jin Lee, Yong ho Park, Jong Woo Won
최이슬, 오정목, 박찬희, 이욱진, 박용호, 원종우
Korean J. Met. Mater. 2024;62(3):171-179.   Published online 2024 Mar 5
DOI: https://doi.org/10.3365/KJMM.2024.62.3.171

This study demonstrates that the addition of the rare earth element Erbium (Er) significantly enhances the machinability and tensile properties of titanium (Ti). Pure Ti alloys and Er-added Ti alloys with 0.5-1.1 wt.% Er content were prepared, and their microstructure, machinability, and tensile properties were compared. Two different types of..... More

180 Development of Electrolyte with Enhanced Corrosion Resistance for Sn Electroplating on Multi-Layer Ceramic Capacitors
고신뢰성 적층 세라믹 커패시터를 위한 침식방지형 주석도금액 개발
Bonil Ku, Junseong Kim, Yujin Son, Kyeongseok Min, Sung-Hyeon Baeck
구본일, 김준성, 손유진, 민경석, 백성현
Korean J. Met. Mater. 2024;62(3):180-189.   Published online 2024 Mar 5
DOI: https://doi.org/10.3365/KJMM.2024.62.3.180

Capacitors not only store and release electricity but selectively conduct alternating current. Among the various types of capacitors, multi-layer ceramic capacitors (MLCCs) have been widely used in automotive, smartphone, and wearable devices because of their compact size and high capacitance capabilities. In this study, we have developed an electrolyte for..... More

190 Investigation of the Calciothermic Reduction of TiO2 for the Green Production of Ti and TiH2 Powders
친환경 Ti 및 TiH2 분말 제조를 위한 TiO2의 칼슘열환원에 대한 기초연구
Sung-Hun Park, Jungshin Kang, Ho-Sang Sohn
박성훈, 강정신, 손호상
Korean J. Met. Mater. 2024;62(3):190-203.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.190

To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO2) was investigated. The mechanism involved in the reduction of TiO2 using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl2), on the calciothermic reduction was investigated by conducting experiments at 1123..... More

204 Identification of Solvent Extraction of Au(III) by Cyanex 272 from Hydrochloric Acid Solutions
Thi Nhan Hau Nguyen, Man Seung Lee
Korean J. Met. Mater. 2024;62(3):204-211.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.204

Bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272) is known to selectively extract Au(III) from dilute to concentrated hydrochloric acid solutions. Therefore, Cyanex 272 can be employed in the separation of Au(III) from the hydrochloric acid leaching solutions of secondary resources containing gold metal. This work identified the extraction reaction of Au(III) by Cyanex..... More

212 Simulation Study of Interfacial Switching Memristor Structure and Neural Network Performance
계면 스위칭 멤리스터 소자 구조와 신경망 회로 성능에 대한 시뮬레이션 연구
Yun Hyeok Song, Ji Min Lim, Sagar Khot, Dongmyung Jung, Yongwoo Kwon
송윤혁, 임지민, Sagar Khot, 정동명, 권용우
Korean J. Met. Mater. 2024;62(3):212-221.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.212

In this study, the architecture of an interfacial switching memristor, which has a metal-insulatormetal structure of Pt/SrTiO3/Nb-SrTiO3 was investigated. The performance of a neural network that uses memristors as its synapse components was also examined with system-level simulations. A finite element solver, COMSOL Multiphysics, was used to simulate synaptic device..... More

222 Behavior of Compound Materials on Superhydrophobic Cylinders: Effects of Droplet’s Size and Interface Angle
다중물질의 초소수성 원통 위 거동: 액적 크기 및 계면각도의 영향
Woorak Choi, Sungchan Yun
최우락, 윤성찬
Korean J. Met. Mater. 2024;62(3):222-228.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.222

Compound droplets can consist of two or more immiscible substances sharing an interface. Among such droplets, the low-viscosity component of Janus droplets can exhibit peculiar bouncing behavior on nonwettable surfaces. There have been recent advances in droplet control technologies, however the impact dynamics of droplets on complex surfaces, and strategies..... More

229 Evaluation of Microstructure and Mechanical Properties of TiAl/HI-TEMP 820/ SCM440H Materials Manufactured through Vacuum Brazing according to Process Temperature
진공 브레이징을 통해 제조한 TiAl/HI-TEMP 820/SCM440H 재료의 공정 온도에 따른 미세조직 및 기계적 특성 평가
Sang-Kyu Yoo, Ji-Won Kim, Cho-Long Lee, Myung-Hoon Oh, In-Chul Choi
유상규, 김지원, 이초롱, 오명훈, 최인철
Korean J. Met. Mater. 2024;62(3):229-238.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.229

The TiAl alloy is attracting attention as a lightweight and heat-resistant material, because of its high specific strength, excellent high-temperature formability, and fatigue strength. However, its applications are limited by its high unit price and low room temperature ductility. To overcome this issue, dissimilarly bonded materials have been extensively employed...... More

Review Papers
239 Research Progress in Nano Materials and Structural Designs for Flexible Piezoresistive Sensors
유연 압저항 센서에 적용되는 나노 소재 및 구조 설계에 대한 최신 연구 동향
Yeoul Kang, Jung Woo Lee
강여울, 이정우
Korean J. Met. Mater. 2024;62(3):239-249.   Published online 2024 Feb 28
DOI: https://doi.org/10.3365/KJMM.2024.62.3.239

This review provides an overview of recent advances in the materials and structural design of flexible piezoresistive sensors, which are of significant interest as smart devices in the Fourth Industrial Revolution. Recent research has focused on addressing demand for a wide pressure range and high sensitivity for use in diverse..... More

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