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Influence of Elevated Temperature on the Mechanical and Microstructural Properties of Glass Fiber-Reinforced Polymers
Se Woong Lee, Seulgi Han, Okmin Park, Sang-il Kim, Sungmo Choi
Korean J. Met. Mater. 2023;61(10):800-806.   Published online 2023 Sep 25
DOI: https://doi.org/10.3365/KJMM.2023.61.10.800

Abstract
Glass fiber-reinforced polymers (GFRPs) have attracted significant attention as structural materials because of their high fatigue resistance, corrosion resistance, strength, and stiffness. This study examined the effect of elevated temperatures (150, 250, 350, and 450oC) on the microstructural and mechanical properties of GFRP plates. The number of bubbles increased as..... More

                   Crossref 1
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

Abstract
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
Electrical, Thermal, and Thermoelectric Transport Properties of Se-doped Polycrystalline Re2Te5
Se Woong Lee, Okmin Park, Hyun-Sik Kim, Won-Seon Seo, Sang-il Kim
Korean J. Met. Mater. 2022;60(12):919-925.   Published online 2022 Nov 25
DOI: https://doi.org/10.3365/KJMM.2022.60.12.919

Abstract
Re2Te5 is considered a potential thermoelectric material because of its intrinsically low thermal conductivity, due to its complex crystal structure. Herein, a series of Se-doped Re2Te5 (Re2Te5-xSex, x = 0, 0.2, 1, and 2) samples were synthesized, and their electrical and thermal transport properties were investigated. Pure orthorhombic Re2Te5 phases..... More

                   Web of Science 3  Crossref 3
Thermoelectric Properties of Cu-added Polycrystalline Bi2O2Se Oxyselenide
Si-young Bae, Se Woong Lee, Hyun-Sik Kim, Okmin Park, Hyunjin Park, Won-Seon Seo, Sang-il Kim
Korean J. Met. Mater. 2022;60(12):912-918.   Published online 2022 Nov 25
DOI: https://doi.org/10.3365/KJMM.2022.60.12.912

Abstract
Bi2O2Se oxyselenide has been actively studied as a potential n-type thermoelectric material because of its intrinsically low thermal conductivity and high Seebeck coefficient (S). However, Bi2O2Se has very low electrical conductivity (σ), resulting in relatively poor thermoelectric performance. Herein, we investigate the effect of Cu addition on the electrical and..... More

                   Web of Science 2  Crossref 2
Study of Phase Formation Behavior and Electronic Transport Properties in the FeSe2 -FeTe2 System
FeSe2-FeTe2 계 다결정 소재의 상 형성 거동 및 전기 전도 특성에 관한 연구
Okmin Park, TaeWan Kim, Se Woong Lee, Hyun-Sik Kim, Weon Ho Shin, Jamil Ur Rahman, Sang-il Kim
박옥민, 김태완, 이세웅, 김현식, 신원호, , 김상일
Korean J. Met. Mater. 2022;60(4):315-320.   Published online 2022 Mar 28
DOI: https://doi.org/10.3365/KJMM.2022.60.4.315

Abstract
In this study, we investigated the phase formation behavior of the FeSe2-FeTe2 system and the evolution of their thermoelectric transport properties. A series of Fe(Se1-xTex)2(x = 0, 0.2, 0.6, 0.8 and 1) compounds were synthesized by conventional solid-state reaction. Single phase orthorhombic structures were formed, except for FeSe0.4Te1.6(x = 0.2)...... More

                   Web of Science 10  Crossref 8
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