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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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Thermomechanical Behavior and Microstructure Properties of Carbon Fiber Reinforced Polymer at Elevated Temperatures
Okmin Park, Seulgi Han, Sanghyun Park, Jamil Ur Rahman, Sang-il Kim, Sungmo Choi
Korean J. Met. Mater.
2024;62(1):57-64. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.57
Abstract
Carbon fiber reinforced polymer (CFRP) has been extensively used in civil engineering for applications such as reinforcing and retrofitting various architectural materials. Therefore, understanding the degradation of CFRP under high temperatures is important. This study aims to investigate the thermomechanical and microstructural properties of CFRP plates at elevated temperatures up.....
More
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.....
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Web of Science 2
Crossref 2
Electrical, Thermal, and Thermoelectric Transport Properties of Co-Doped
n
-type Cu
0.008
Bi
2
Te
2.6
Se
0.4
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
Bi
2
Te
3
-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 Cu
0.008
Bi
2
Te
2.6
Se
0.4
polycrystalline alloys (Cu
0.008
Bi
2−x
Co
x
Te
2.6
Se
0.4
,
x
= 0, 0.03, 0.06, 0.09 and 0.12) are investigated. The electrical conductivity of the Cu
0.008
Bi
1.97
Co
0.03
Te
2.6
Se
0.4
(
x
=.....
More
Web of Science 2
Crossref 2
Transition to n-type Thermoelectric Conduction in Ni-doped FeSe
2
Alloys
Young Bin An, Sang Jeong Park, Okmin Park, Sang-il Kim
Korean J. Met. Mater.
2022;60(12):926-932. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.926
Abstract
We investigated the effect of Ni doping on the electrical, thermal, and thermoelectric transport properties of FeSe
2
polycrystalline alloys. FeSe
2
alloys exhibit both n-type and p-type conduction at different temperatures and thus their practicality as a thermoelectric material is somewhat limited. In this study, Fe
1-x
Ni
x
Se
2
polycrystalline samples with
x
=.....
More
Web of Science 5
Crossref 5
Electrical, Thermal, and Thermoelectric Transport Properties of Se-doped Polycrystalline Re
2
Te
5
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
Re
2
Te
5
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 Re
2
Te
5
(Re
2
Te
5-x
Se
x
,
x
= 0, 0.2, 1, and 2) samples were synthesized, and their electrical and thermal transport properties were investigated. Pure orthorhombic Re
2
Te
5
phases.....
More
Web of Science 3
Crossref 3
Thermoelectric Properties of Cu-added Polycrystalline Bi
2
O
2
Se 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
Bi
2
O
2
Se 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, Bi
2
O
2
Se 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 FeSe
2
-FeTe
2
System
FeSe
2
-FeTe
2
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 Kim박옥민, 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 FeSe
2
-FeTe
2
system and the evolution of their thermoelectric transport properties. A series of Fe(Se
1-x
Te
x
)
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 FeSe
0.4
Te
1.6
(
x
= 0.2)......
More
Web of Science 11
Crossref 10
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