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Characterization of Electronic Transport Properties of Narrow-Band Gap Fe(Se<sub>1-x</sub>Te<sub>x</sub>)<sub>2</sub> Alloys via the Two-Band Model
Two-Band 모델을 이용한 작은 밴드 갭을 가진 Fe(Se1-xTex)2 열전합금의 전기적 수송 특성 분석
Seong-Mee Hwang, Sang-il Kim, Min-Su Heo, Kiyoung Lee, Heesun Yang, Won-Seon Seo, Hyun-Sik Kim
황성미, 김상일, 허민수, 이기영, 양희선, 서원선, 김현식
Korean J. Met. Mater. 2023;61(2):98-106.   Published online 2023 Jan 27
DOI: https://doi.org/10.3365/KJMM.2023.61.2.98

Abstract
Environmentally sustainable thermoelectric technologies can be more broadly applied in industries once the performance of thermoelectric materials is improved. Several approaches have been proposed to improve the electronic transport properties of thermoelectric materials. The effects of each approach on the electronic properties can be evaluated by changes in the band..... More

                
Approaches to Estimate the Magnitude of Phonon Scattering via Point Defects in Mo(Se<sub>1-x</sub>Te<sub>x</sub>)<sub>2</sub> Thermoelectric Alloys
Mo(Se1-xTex)2 열전합금의 점 결함에 의한 포논 산란 효과 분석
You-Jong Lee, Sang-il Kim, Seong-Mee Hwang, Jeong-Yeon Kim, Won-Seon Seo, Hyun-Sik Kim
이유종, 김상일, 황성미, 김정연, 서원선, 김현식
Korean J. Met. Mater. 2023;61(1):38-45.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.38

Abstract
One of the most popular routes used to improve the thermoelectric performance of materials is to suppress their lattice thermal conductivities. Thermoelectric performance is characterized by a figure-of-merit zT, which is defined as σS2T/(κe + κl), where the σ, S, T, κe, and κl are the electrical conductivity, Seebeck coefficient,..... More

                
Effects of V Alloying on Thermoelectric Properties of NbFeSb Half-Heusler Materials Codoped with Ti, Zr, and Sn
Sung-Jae Joo, JeongIn Jang, Ji-Hee Son, Bong-Seo Kim, Bok-Ki Min
Korean J. Met. Mater. 2022;60(11):858-864.   Published online 2022 Oct 31
DOI: https://doi.org/10.3365/KJMM.2022.60.11.858

Abstract
NbFeSb-based alloys are promising p-type half-Heusler materials with excellent thermoelectric performance, thermal stability, and naturally abundant constituent elements. Alloying and doping are powerful techniques for enhancing the thermoelectric properties of half-Heusler materials. This study experimentally investigated the effects of V alloying in NbFeSb codoped with Ti, Zr, and Sn. As..... More

                
Thermal Properties of Copper Matrix-Ceramic Filler Composite Prepared by Polymer Solution Method
Bok-Hyun Oh, Chung-Il Ma, Ji-Yeon Kwak, Heon Kong, Sang-Jin Lee
Korean J. Met. Mater. 2022;60(1):68-75.   Published online 2021 Dec 10
DOI: https://doi.org/10.3365/KJMM.2022.60.1.68

Abstract
A copper (Cu) metal-ceramic filler composite with high thermal conductivity and a suitable thermal expansion coefficient was designed for application as a high-performance heat dissipation material. The purpose of the designed material was to utilize the high thermal conductivity of Cu while lowering its high coefficient of thermal expansion by..... More

                
Influence of Cu Doping on Bipolar Conduction Suppression for <i>p</i>-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> and Bi<sub>0.4</sub>Sb<sub>1.6</sub>Te<sub>3</sub> Alloys
Cu 첨가에 따른 p-type Bi0.5Sb1.5Te3 및 Bi0.4Sb1.6Te3 합금의 양극성 전도 저감 효과
Hyun-Jun Cho, Hyun-Sik Kim, Woong-hee Sohn, Sang-il Kim
조현준, 김현식, 손웅희, 김상일
Korean J. Met. Mater. 2020;58(6):439-445.   Published online 2020 May 21
DOI: https://doi.org/10.3365/KJMM.2020.58.6.439

Abstract
In this study, we report how Cu doping can modify the thermoelectric performance of p-type Bi0.5Sb1.5Te3 and Bi0.4Sb1.6Te3 thermoelectric alloys, including their electronic and thermal transport properties. For electronic transport, the power factors of both Bi0.5Sb1.5Te3 and Bi0.4Sb1.6Te3 compositions were increased by Cu doping. The origins of the enhanced power..... More

                   Web of Science 6  Crossref 2
Effects of Ni and Cu Addition on Tensile Properties and Thermal Conductivity of High Pressure Die-cast Al-6Si Alloys
고압 다이캐스팅 Al-6Si계 합금의 인장특성 및 열전도성에 미치는 Ni과 Cu 첨가 영향
Jae-Cheol Jang, Kwang Seon Shin
장재철, 신광선
Korean J. Met. Mater. 2020;58(4):217-226.   Published online 2020 Mar 10
DOI: https://doi.org/10.3365/KJMM.2020.58.4.217

Abstract
In this study, the effects of nickel and copper on the mechanical and thermal properties of Al-Si alloys were investigated, for different alloy compositions. Thermodynamic calculations were carried out to predict the alloys’ solidification behavior (solidification temperature, solid fraction and physical properties (density, thermal conductivity, elastic modulus, bulk modulus)). The..... More

                   Web of Science 5  Crossref 4
Effect of CaF<sub>2</sub> Addition on the Crystallinity of Hexagonal Boron Nitride Nanoparticles
육방정 질화붕소 나노입자의 결정성에 미치는 불화칼슘 첨가의 영향
Jae-Yong Jung, Yang-Do Kim, Young-Kuk Kim
정재용, 김양도, 김영국
Korean J. Met. Mater. 2018;56(12):915-920.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.915

Abstract
With the development of modern microelectronics technologies, the power density of electronic devices is rapidly increasing, due to the miniaturization or integration of device elements which operate at high frequency, high power conditions. Resulting thermal problems are known to cause power leakage, device failure and deteriorated performance. To relieve heat..... More

                
Effect of Alloying Elements on the Thermal Conductivity and Casting Characteristics of Aluminum Alloys in High Pressure Die Casting
고압 다이캐스팅용 알루미늄 합금의 열전도성 및 주조성에 미치는 첨가원소의 영향
Cheol-Woo Kim, Young-Chan Kim, Jung-Han Kim, Jae-Ik Cho, Min-Suk Oh
김철우, 김영찬, 김정한, 조재익, 오민석
Korean J. Met. Mater. 2018;56(11):805-812.   Published online 2018 Nov 5
DOI: https://doi.org/10.3365/KJMM.2018.56.11.805

Abstract
High pressure die casting is one of the precision casting methods. It is highly productivity and suitable for manufacturing components with complex shapes and accurate dimensions. Recently, there has been increasing demand for efficient heat dissipation components, to control the heat generated by devices, which directly affects the efficiency and..... More

                   Crossref 8
Thermal Conductivity of Double-Layer Clad Metals along the Thickness Direction Using Light Flash Analysis and Estimation Models
2층금속 클래드메탈의 두께방향으로 섬광법 적용 열전도도 측정과 예측모델 연구
Jong-Gu Kim, Jae-Hoon Ju, Dong-Yong Kim, Sung Hyuk Park, Young-Rae Cho
김종구, 주재훈, 김동용, 박성혁, 조영래
Korean J. Met. Mater. 2017;55(7):523-528.   Published online 2017 Jul 4
DOI: https://doi.org/10.3365/KJMM.2017.55.7.523

Abstract
Heat transfer plays a critical role in the fabrication of high efficiency electronic devices. Double-layer clad metals consisting of stainless steel (STS) and aluminum (Al) alloy were fabricated by the roll bonding process, and their thermal conductivity was calculated using measurements of density, specific heat, and thermal diffusivity obtained by..... More

       Crossref 3
Thermal Properties of Two-Layered Materials Composed of Polymer Layer Embedded with AlN Particles on Al Substrate along the Thickness Direction
AlN입자 함유 폴리머 후막을 Al기판에 형성한 2층 층상재료의 두께 방향에 대한 열전도 특성
Jong-Gu Kim, Jae-Hoon Ju, Byung-Dong Hahn, Sang-Hee Park, Young-Rae Cho
김종구, 주재훈, 한병동, 박상희, 조영래
Korean J. Met. Mater. 2017;55(6):446-452.   Published online 2017 Jun 1
DOI: https://doi.org/10.3365/KJMM.2017.55.6.446

Abstract
The thermal properties of two-layered materials composed of a polymer layer embedded with dielectric AlN particles (AlN composite) coated on top of an aluminum (Al) substrate were investigated by light flash analysis (LFA). The thermal conductivity of the specimens was measured as a function of the AlN composite volume fraction..... More

       Crossref 1
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