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Effect of Lead and Antimony on Sulfuric Acid Leaching of Copper in Speiss from Top Submerged Lance Furnaces
Top submerged lance 로의 스파이스산물 중 구리의 황산 침출에 대한 납과 안티몬의 영향
Sujin Chae, Kyoungkeun Yoo, Richard Diaz Alorro, Manis Kumar Jha
채수진, 유경근, Richard Diaz Alorro, Manis Kumar Jha
Korean J. Met. Mater. 2021;59(1):33-40.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.33
Abstract
Cu-Pb and Cu-Sb alloys were prepared at various ratios, from 10:90 to 90:10, and leaching tests with sulfuric acid were conducted to investigate the effect of Pb and Sb on the leaching of Cu from speiss, which is obtained from the top submerged lance furnace process. The Cu leaching... More
      
Preparation of Electroformed Copper-Nickel Multi-Nano-Layers and Characterization of Their Electromagnetic Shielding Effectiveness
구리-니켈 다층 나노 도막 제조와 전자파 차폐 효과 평가
Yong Choi
최용
Korean J. Met. Mater. 2020;58(9):639-644.   Published online 2020 Aug 19
DOI: https://doi.org/10.3365/KJMM.2020.58.9.639

Abstract
Thin copper-nickel foil with multi-nano layers was prepared by pulse-electroforming to develop a high performance electromagnetic shielding material for electronic devices. The pulse electroforming conditions of the aqueous solution chemistry were selected based on the aqueous copper-nickel-sulfur phase diagram and an evaluation of the deposition rate using the finite element..... More

                        
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

                        
Synthesis and Characterization of the Cu<sub>0.72</sub>Co<sub>2.28</sub>O<sub>4</sub> Catalyst for Oxygen Evolution Reaction in an Anion Exchange Membrane Water Electrolyzer
음이온 교환막 수전해에 사용되는 Cu0.72Co2.28O4 산소 발생 촉매의 합성 및 특성 분석
Sung Min Park, Myeong Je Jang, Yoo Sei Park, Jooyoung Lee, Jae-yeop Jeong, Jaehoon Jung, Min-Kwan Choi, Yu-Seong Noh, Min-Ho Seo, Hyung Ju Kim, Juchan Yang, Yang Do Kim, Sung Mook Choi
박성민, 장명제, 박유세, 이주영, 정재엽, 정재훈, 최민관, 노유성, 서민호, 김형주, 양주찬, 김양도, 최승목
Korean J. Met. Mater. 2020;58(1):49-58.   Published online 2019 Dec 12
DOI: https://doi.org/10.3365/KJMM.2020.58.1.49

Abstract
In this study, we investigated the morphological, crystal structural, electronic structural, and electrocatalytic properties of the inverse spinel structured copper cobalt oxide (Cu0.72Co2.28O4) catalysts. The materials were prepared by coprecipitation using various copper and cobalt precursors, and subsequent oxidation treatment. Electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer Emmett..... More

                           Cited By 3
Changes in Electrical Properties of Copper-Plated Layer by Organic Additives on High Current Density
고전류밀도에서 유기첨가제에 의한 구리 전착층의 전기적 특성 변화
Tae-Gyu Woo, Il-Song Park
우태규, 박일송
Korean J. Met. Mater. 2020;58(1):41-48.   Published online 2019 Dec 12
DOI: https://doi.org/10.3365/KJMM.2020.58.1.41

Abstract
Electroplating has many economic advantages in producing copper foils. The easiest way to manufacture electroplated copper foil with various properties is to add appropriate additives. This study evaluated the surface properties, mechanical and electrical properties of copper foil electroplated in electrolytes containing the leveler JGB (Janus Green B). When the..... More

                        
Optimization of ZnO/Cu/ZnO Flexible Transparent Conductive Electrodes Fabricated by Magnetron Sputtering
마그네트론 스퍼터링법으로 제조된 ZnO/Cu/ZnO 유연 투명전극 성능 최적화 연구
Daekyun Kim, Taehyeong Lee, Dooho Choi
김대균, 이태형, 최두호
Korean J. Met. Mater. 2019;57(12):795-800.   Published online 2019 Nov 22
DOI: https://doi.org/10.3365/KJMM.2019.57.12.795

Abstract
With the expanding development of flexible optoelectronic devices, the need for high-performance (i.e., high conductivity, high transmittance and flexibility) transparent conductive electrodes has grown. In this study, the critical role of thickness for each of the layers in ZnO/Cu/ZnO transparent conductive electrodes (TCE) for optoelectronic devices has been investigated. The..... More

                           Cited By 1
Selective Extraction of Cu(II) from Sulfuric Acid Leaching Solutions of Spent Lithium Ion Batteries Using Cyanex 301
폐리튬 이차전지 황산침출용액에서 Cyanex 301에 의한 구리(II)의 선택적 추출
Se Ah Lee, Man Seung Lee
이세아, 이만승
Korean J. Met. Mater. 2019;57(9):596-602.   Published online 2019 Aug 21
DOI: https://doi.org/10.3365/KJMM.2019.57.9.596

Abstract
Spent lithium ion batteries contain cobalt, copper, lithium, manganese and nickel. Recovery of these metals with high purity from spent lithium ion batteries is of importance. A sulfuric acid solution is generally employed for the treatment of spent lithium ion batteries, but it is difficult to separate these metal ions..... More

                        
High-Temperature Oxidation of Fe-12Cr-0.3C-4Mn-(13-15)Cu Composite Alloys
Min Jung Kim, Sang-Hwan Bak, Junhee Hahn, Seon Jin Kim, Dong Bok Lee
Korean J. Met. Mater. 2019;57(9):575-581.   Published online 2019 Aug 21
DOI: https://doi.org/10.3365/KJMM.2019.57.9.575

Abstract
Alloys of Fe-12Cr-0.3C-4Mn-(13, 14, 15)Cu (wt%) were cast using an induction furnace. They were structurally heterogeneous composites that consisted of a relatively stiff α-Fe matrix and a soft (Cu, Mn)-rich secondary phase. They were developed as self-lubricating, wear-resistant metals. Since the formation of oxides plays an important role in wear,..... More

                           Cited By 1
Effect of Ni and Cu Addition on Corrosion Behaviors of Pre-Oxidized Ultra-Strong Steel for Automotive Applications
Ni 및 Cu 첨가가 고온 산화된 자동차용 초고강도 강재의 부식 거동에 미치는 영향
Seung Min Ryu, Hwan Goo Seong, Jeong Kil Kim, Joong-Ki Hwang, Man Jae Lee, Min-Suk Oh, Sung Jin Kim
류승민, 성환구, 김정길, 황중기, 이만재, 오민석, 김성진
Korean J. Met. Mater. 2019;57(6):343-351.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.343

Abstract
The incomplete elimination of oxide scale formed during the normalizing process can result in severe degradation of the surface and mechanical properties of ultra-strong steels. This study revealed that the formation of oxide scale was highly dependent upon the alloying elements Ni and Cu. Ni-bearing steel showed a much higher..... More

                           Cited By 1
Optimization of Flexible, Transparent TiO<sub>2</sub>/Cu/ZnO Electrodes by Simultaneous Suppression of Optoelectrical Losses and Pinhole Formation
광전 손실과 핀홀 생성의 억제를 통한 유연 투명 TiO2/Cu/ZnO 전극의 최적화 연구
Eunwook Jeong, Gun-Hwan Lee, Young-Rae Cho, Jungheum Yun
정은욱, 이건환, 조영래, 윤정흠
Korean J. Met. Mater. 2019;57(5):316-323.   Published online 2019 Apr 10
DOI: https://doi.org/10.3365/KJMM.2019.57.5.316

Abstract
We demonstrated an effective method for fabricating a highly efficient flexible transparent electrode in an oxide/metal/oxide configuration based on an ultrathin Cu film. It exhibited low losses in optical transmittance and electrical conductivity while minimizing current loss due to pinhole-related leakages. The Cu film was developed on a chemically heterogeneous..... More

                           Cited By 2
Flexible OLED Encapsulation with LMPA Line
저융점합금 라인을 이용한 플렉시블 OLED 봉지
Geon Bae, Cheol-Hee Moon
배건, 문철희
Korean J. Met. Mater. 2019;57(4):251-257.   Published online 2019 Apr 5
DOI: https://doi.org/10.3365/KJMM.2019.57.4.251

Abstract
We have developed an encapsulation technology for OLED devices using an LMPA sealing line to enhance barrier characteristics against moisture and oxygen penetration. To verify the potential of this technology for flexible OLED devices, three experimental factors were investigated in this study. First, the stability of the sealing line on..... More

                        
Effect of Shear Deformation During Drawing on Inhomogeneous Microstructures and Textures in High Purity Copper Wires After Annealing
고순도 구리 선재의 어닐링 후 불균질 미세조직과 집합조직에 미치는 신선 시 전단 변형의 영향
Hyun Park, Sang-Hyeok Kim, Se-Jong Kim, Hyo-Jong Lee
박현, 김상혁, 김세종, 이효종
Korean J. Met. Mater. 2018;56(12):861-869.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.861

Abstract
To determine the origin of the inhomogeneous microstructure and texture observed in drawn and annealed high purity copper wires, two kinds of drawing process conditions and their influence was investigated. The regular condition, based on a symmetric die, and a condition designed intentionally to produce an inhomogeneous shear deformation using..... More

                           Cited By 1
Bridge Burst Characteristics of Aluminum and Copper Thin-Film Bridges in Electrical Initiation Devices
Kyoungjin Kim, Kyu-Hyoung Kim, Seung-gyo Jang
Korean J. Met. Mater. 2018;56(3):235-243.   Published online 2018 Mar 6
DOI: https://doi.org/10.3365/KJMM.2018.56.3.235

Abstract
The optimal design of electrical initiation devices for explosive charges and other high energy materials critically depends on the bridge burst or the electrical explosion of the thin-film metallic bridges. It is therefore quite important to select the right material with suitable explosion properties for the metallic bridge film. However,..... More

      
Material Characterization of Single Crystalline Cu Subjected to High Strain Rates and High Temperatures for Multiscale Simulation
Yujin Seong, Youngkyu Kim, Im Doo Jung, Sungho Kim, See Jo Kim, Seong-Gon Kim, Hak Jun Kim, Seong Jin Park
Korean J. Met. Mater. 2017;55(11):760-767.   Published online 2017 Oct 31
DOI: https://doi.org/10.3365/KJMM.2017.55.11.760

Abstract
The material characterization of single crystalline Cu columns was numerically carried out at the submicroscopic level. A molecular dynamics (MD) simulation was employed using the embedded-atom method (EAM) interatomic potential between a pair of Cu atoms to describe the interactions among Cu atoms. First, the relationship between mechanical properties and..... More

         Cited By 1
Review of Conductive Copper Paste for c-Si Solar Cells
Sang Hee Lee, Doo Won Lee, Soo Hong Lee
Korean J. Met. Mater. 2017;55(9):637-644.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.637

Abstract
In the photovoltaic industries, the main technique of metallization is screen printing with silver pastes, due to its simple and quick process. However, the high price of silver paste is one of the barriers to the producing of low cost solar cells. Consequently, a primary target in photovoltaic research is..... More

         Cited By 1
Effects of Friction and Anvil Design on Plastic Deformation during the Compression Stage of High-Pressure Torsion
Yuepeng Song, Miaomiao Chen, Baoyan Xu, Dongsheng Gao, Jing Guo, Lingfeng Xu, Zheng Wang, Hyoung Seop Kim
Korean J. Met. Mater. 2016;54(11):831-837.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.831

Abstract
Herein, we report the results of our investigation on the effect of friction and anvil design on the heterogeneous plastic-deformation characteristics of copper during the compressive stage of high-pressure torsion (HPT), using the finite element method. The results indicate that the friction and anvil geometry play important roles in the..... More

         Cited By 2
Electronic Materials
The Effects of Bis(3-Sulfo-Propyl)di-Sulfide (SPS) Additives on the Surface Morphology and Mechanical Properties of Electrolytic Copper Foil
전해 동박의 표면 형상 및 기계적 물성에 미치는 SPS 첨가제 영향
Tae-Gyu Woo
우태규
Korean J. Met. Mater. 2016;54(9):681-687.   Published online 2016 Sep 5
DOI: https://doi.org/10.3365/KJMM.2016.54.9.681

Abstract
In this study the effects of Bis(3-Sulfo-Propyl)di-Sulfide (SPS) on the elongation, surface morphology and crystal structure of electrolytic copper foil were investigated. Additives HEC (hydroxyethyl cellulose) (A), SPS(B), Coll-A(C) were used in the study, and the additive used as D was a Cl- ion. The study results show that there..... More

         Cited By 3
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