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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

Abstract
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

                
Comparison of Weldability and Microstructure in Resistance Spot Welding of Aluminum 5052-H32 Alloy and Al 6014-T4 Alloy
알루미늄 5052-H32 합금과 6014-T4 합금의 저항 점 용접 시 용접성 및 미세조직 비교
Hyun-Uk Jun, Jaehun Kim, Wonho Kim, Jooyong Cheon, Ki-Man Bae, Eun-Kyung Lee, Yeong-Do Park, Changwook Ji
전현욱, 김재훈, 김원호, 천주용, 배기만, 이은경, 박영도, 지창욱
Korean J. Met. Mater. 2024;62(1):1-11.   Published online 2023 Dec 29
DOI: https://doi.org/10.3365/KJMM.2024.62.1.1

Abstract
This study was performed to compare the resistance spot weldability of Al 5052-H32 alloy and Al 6014-T4 alloy, and the cause of the differences in the weldability was investigated. In general, the surface of the aluminum alloy has an oxide film several nm thick, and local heat input is generated..... More

                
Effect of Corrosive Environment on Friction Characteristics of Brake Friction Materials
브레이크 마찰재의 마찰특성에 미치는 부식 환경의 영향
Hee-sup Shin, Yool-koo Kim, Sang-mok Lee
신희섭, 김율구, 이상목
Korean J. Met. Mater. 2023;61(12):943-950.   Published online 2023 Nov 30
DOI: https://doi.org/10.3365/KJMM.2023.61.12.943

Abstract
The friction properties of brake friction materials are investigated utilizing the different car cleaners. Water, wheel cleaner and tire dressing were used to designate driving conditions in the field. The friction materials were soaked in each solution before friction test. The Coefficient of friction (COF) was similar in the case..... More

                
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

Abstract
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

                
Real-Time Position Detecting of Large-Area CNT-based Tactile Sensors based on Artificial Intelligence
인공지능을 기반으로 한 대면적 CNT 기반 촉각 센서의 실시간 위치 탐색 연구
Min-Young Cho, Seong Hoon Kim, Ji Sik Kim
조민영, 김성훈, 김지식
Korean J. Met. Mater. 2022;60(10):793-799.   Published online 2022 Sep 29
DOI: https://doi.org/10.3365/KJMM.2022.60.10.793

Abstract
For medical device and artificial skin applications, etc., large-area tactile sensors have attracted strong interest as a key technology. However, only complex and expensive manufacturing methods such as fine pattern alignment technology have been considered. To replace the existing smart sensor, which has to go through a complicated process, a..... More

                   Web of Science 1  Crossref 1
Electrochemical Performance of the Ni-Fe Based Metal-Support Solid Oxide Fuel Cell with Ba-Sr-Co-Fe-O and La-Sr-Mn-O Cathodes
Ba-Sr-Co-Fe 산화물과 La-Sr-Mn 산화물 양극을 포함하는 Ni-Fe 기반 금속지지형 고체산화물 연료전지의 전기화학적 성능
Sang Eun Lee, Jun Seo Park, Hee Jung Park
이상은, 박준서, 박희정
Korean J. Met. Mater. 2022;60(7):523-530.   Published online 2022 Jun 3
DOI: https://doi.org/10.3365/KJMM.2022.60.7.523

Abstract
Unlike conventional solid oxide fuel cells (SOFCs) where ceramic materials have been used as a support, in this study a new SOFC structure with a metal support and a contact layer between the support and anode is suggested. A mixture of Ni-Fe alloy and zirconia ceramics as the contact layer..... More

                   Web of Science 1  Crossref 1
Effects of Blended Poly(3-hexylthiophene) and 6,13-bis(triisopropylsilylethynyl) pentacene Organic Semiconductors on the Photoresponse Characteristics of Thin-Film Transistors
Hyunji Shin, Hyeonju Lee, Bokyung Kim, Xue Zhang, Jin-Hyuk Bae, Jaehoon Park
Korean J. Met. Mater. 2022;60(3):198-205.   Published online 2022 Feb 8
DOI: https://doi.org/10.3365/KJMM.2022.60.3.198

Abstract
In this study, we demonstrate high-performance optical wavelength-selective organic thin-film transistors (TFTs) that incorporate heterogeneous organic semiconductor materials, poly(3-hexylthiophene) (P3HT) and 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene). The electrical characteristics of the fabricated transistors were analyzed in the dark to determine how the P3HT:TIPS-pentacene ratio of the semiconductor affected the performance of the..... More

                   Web of Science 3  Crossref 3
Synthesis of Nb<sub>0.8</sub>Hf<sub>0.2</sub>FeSb<sub>0.98</sub>Sn<sub>0.02</sub> and Hf<sub>0.25</sub>Zr<sub>0.25</sub>Ti<sub>0.5</sub>NiSn<sub>0.98</sub>Sb<sub>0.02</sub> Half-Heusler Materials and Fabrication of Thermoelectric Generators
Sung-Jae Joo, Ji-Hee Son, JeongIn Jang, Bong-Seo Kim, Bok-Ki Min
Korean J. Met. Mater. 2021;59(12):904-910.   Published online 2021 Nov 19
DOI: https://doi.org/10.3365/KJMM.2021.59.12.904

Abstract
In this study, half-Heusler (HH) thermoelectric materials Nb0.8Hf0.2FeSb0.98Sn0.02 (p-type) and Hf0.25Zr0.25Ti0.5NiSn0.98Sb0.02 (n-type) were synthesized using induction melting and spark plasma sintering. For alloying, a conventional induction melting technique was employed rather than arc melting, for mass production compatibility, and the thermoelectric properties of the materials were analyzed. The maximum dimensionless..... More

                   Web of Science 2  Crossref 2
Improvement of Wear Resistance in Laser Shock-Peened Copper Contacts
Donghyuck Jung, Changkyoo Park, Eun-Joon Chun, Yoon-Jun Kim
Korean J. Met. Mater. 2020;58(8):560-565.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.560

Abstract
This study investigated the influence of laser shock peening without coating (LSPw/oC) on the degradation of copper electrical contacts. A theoretical calculation of the plastic-affected depth (PAD) induced by LSPw/oC was performed, based on the laser-induced plasma pressure along with the Hugoniot elastic limit of our LSPw/oC experimental conditions. The..... More

                   Web of Science 4  Crossref 3
Wetting Behavior of Liquids on Micro-Patterned Polymer Surfaces Fabricated by Thermal Imprinting
Kwang-Jin Bae, Wenhui Yao, Yiliang He, Young-Rae Cho
Korean J. Met. Mater. 2017;55(9):624-631.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.624

Abstract
The wetting behavior of liquids on solid surfaces is important in the study of surfaces and interfaces. In this study, the wetting behavior of deionized (DI) water and hexadecane on fluorinated and micro-patterned polymer surfaces was investigated. The sample surfaces were processed by spray coating and thermal imprinting, respectively. The..... More

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