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Volume 59(1); Jan 2021
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Research Papers
1 Mechanical Behavior of Spin-Coated Sb2S3 light Absorption Thin Films
스핀 코팅법에 의한 Sb2S3 광흡수층 박막의 기계적 거동
Mao Zhang, Dayoung Yoo, Youngseon Jeon, Dongyun Lee
장마오, 유다영, 전영선, 이동윤
Korean J. Met. Mater. 2021;59(1):1-7.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.1

Abstract
To measure the mechanical properties of Sb2S3, a two-component compound semiconductor used in the light absorption layer of a solar cell, Sb2S3 thin films were formed on FTO glass using the spin coating method. The spin-coated Sb2S3 thin films were heat-treated at 200 oC in an Ar atmosphere for up..... More

                        
8 Behavior of Dynamic Strain Aging in Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr Alloy Strip
Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr 지르코늄 합금 압연 판재의 동적 변형시효 거동
Il-Hyun Kim, Myung-Ho Lee, Yang-Il Jung, Hyun-Gil Kim, Jae-Il Jang
김일현, 이명호, 정양일, 김현길, 장재일
Korean J. Met. Mater. 2021;59(1):8-13.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.8

Abstract
The behavior of dynamic strain aging (DSA) in a Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr alloy strip was investigated at temperature ranges of 25–600 °C via a tensile test. The tensile test was performed at two different strain rates 8.33 × 10-5 and 1.67 × 10-2 s-1. The shear stress of the alloy strip revealed..... More

                        
14 Study on the Manufacturing of Ultra-Fine Ore Briquettes for Charging in a Sintering Machine
소결기 장입을 위한 미분광브리켓 제조에 대한 연구
Jong-Ho Bae, Kang-Min Kim, Kyeong-Uk Lee, Jeong-Whan Han
배종호, 김강민, 이경욱, 한정환
Korean J. Met. Mater. 2021;59(1):14-20.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.14

Abstract
In ironmaking, the optimal size of the iron ore charged into a blast furnace is generally 10-30 mm. Oversized ores, which have a smaller reaction surface area, are crushed, while undersized ores, which decrease permeability, undergo a sizing process before being charged into the blast furnace. Recently, however, iron ore..... More

                        
21 Cold Cracks in Fillet Weldments of 600 MPa Tensile Strength Low Carbon Steel and Microstructural Effects on Hydrogen Embrittlement Sensitivity and Hydrogen Diffusion
인장강도 600 MPa급 저탄소강 필렛 용접부의 저온균열과 미세조직에 따른 수소취성 민감성 및 수소확산 거동
Hyoungjin An, Junghoon Lee, Hanji Park, Jaeseok Yoo, Sungwook Chung, Jongmin Park, Namhyun Kang
안형진, 이정훈, 박한지, 유재석, 정성욱, 박종민, 강남현
Korean J. Met. Mater. 2021;59(1):21-32.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.21

Abstract
Hydrogen flowing into a weld causes hydrogen embrittlement (HE), so to prevent cold cracks in the weld, HE must be suppressed. In this study, single-pass fillet weldments were fabricated using two different welding fillers with the same strength level as the American Welding Society standard. The specimen F-HNi, which had..... More

                        
33 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

                        
41 Hydrogen-Based Reduction Ironmaking Process and Conversion Technology
수소 기반 환원 제철 공정과 전환 기술
Sang-Ho Yi, Woon-Jae Lee, Young-Seok Lee, Wan-Ho Kim
이상호, 이운재, 이영석, 김완호
Korean J. Met. Mater. 2021;59(1):41-53.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.41

Abstract
This study analyzed the current state of technical development of the BF-based process, to determine ways to reduce carbon consumption. The technical features of the hydrogen reduction ironmaking process were also examined as a decarbonized ironmaking method, and related issues that should be considered when converting to hydrogen reduction are..... More

                        
54 Impact of Fermi Surface Shape Engineering on Calculated Electronic Transport Properties of Bi-Sb-Te
페르미 면 형상제어에 따른 Bi-Sb-Te 이론 전자수송 특성 변화
Sang-il Kim, Jong-Chan Lim, Heesun Yang, Hyun-Sik Kim
김상일, 임종찬, 양희선, 김현식
Korean J. Met. Mater. 2021;59(1):54-60.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.54

Abstract
Using thermoelectric refrigerators can address climate change because they do not utilize harmful greenhouse gases as refrigerants. To compete with current vapor compression cycle refrigerators, the thermoelectric performance of materials needs to be improved. However, improving thermoelectric performance is challenging because of the trade-off relationship between the Seebeck coefficient and..... More

                        
61 A New Fracture Analysis Technique for Charpy Impact Test Using Image Processing
Tae Chang Park, Beom Suk Kim, Ji Hee Son, Yeong Koo Yeo
Korean J. Met. Mater. 2021;59(1):61-66.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.61

Abstract
The Charpy impact test is used to identify the transition between ductility and brittleness. The percentages of ductile and brittle fractures in steel can be evaluated based on each fracture area, which is presently determined by an analyzer with the naked eye. This method may lead to subjective judgement, and..... More

                        
67 Properties of Urea Added Perovskite Solar Cells according to ZrO2 Electronic Transport Layer Thicknesses
ZrO2 전자전달층 두께에 따른 우레아 첨가 페로브스카이트 태양전지의 물성
Kwangbae Kim, Ohsung Song
김광배, 송오성
Korean J. Met. Mater. 2021;59(1):67-72.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.67

Abstract
The properties of 6 mM urea added perovskite solar cells (PSCs) according to ZrO2 electron transport layer (ETL) thicknesses of 204, 221, 254, and 281 nm were examined. A solar simulator was used to characterize the photovoltaic properties of the cell. Optical microscopy and field emission scanning electron microscope were..... More

                        
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