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Twin wire arc spray 공정을 통해 제작된 Al-Al
2
O
3
복합소재 미끄럼 방지 코팅의 우수한 마모 저항성
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권한솔, 박영진, 강용진, 김도현, 남욱희, 변응선
Korean J. Met. Mater.
2024;62(4):257-266. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.257
Abstract
In this study, novel non-skid Al-Al
2
O
3
coatings with improved wear resistance were fabricated using twin wire arc spray (TWAS). TWAS Al coating was prepared as a reference sample and representative TWAS parameters (working distance, process gas pressure, arc current) were controlled to fabricate different Al-Al
2
O
3
coatings. The Al-Al
2
O
3
coatings showed.....
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Twin wire arc spray 용사코팅 공정을 통해 제작된 미끄럼 방지 코팅의 열적 특성 및 고온노출 거동 연구
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권한솔, 박영진, 남욱희, 변응선
Korean J. Met. Mater.
2023;61(9):642-651. Published online 2023 May 14
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.642
Abstract
Conventional non-skid coatings for marine construction contain polymeric materials. These materials are generally susceptible to high temperature environments because of their low thermal conductivity and thermal resistance. A metal-based non-skid coating has great potential for high temperature applications, yet, there has only been limited research. In this study, twin wire.....
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Web of Science 1
Crossref 1
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딥코팅 방법을 활용한 게이트 산화물 유전체 및 반도체 박막의 제조 및 박막트랜지스터 응용
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김용완, 하영근
Korean J. Met. Mater.
2023;61(8):581-588. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.581
Abstract
The potential applications of advanced electronic materials in large-area, printable, and flexible electronics have generated significant interest. However, creating high-performance, low-voltage thin-film transistors (TFTs) for these applications remains difficult due to a lack of advanced gate dielectric and semiconductor materials that meet both ease-of-fabrication requirements and high electrical performance. In.....
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강도조합에 따른 TWB 핫스탬핑 부품의 미세구조 및 충돌성능 비교 분석
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이창욱, 황연정, 허욱, 유병길, 유지홍, 김태정, 윤광민
Korean J. Met. Mater.
2022;60(11):801-810. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.801
Abstract
Hot stamping technology has been steadily developed because it provides both excellent formability and high strength. With the development of TWB hot stamping technology, it is now possible to freely apply the required strength and thickness in the right place. In this study, the microstructure and collision performance of TWB.....
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Web of Science 1
Crossref 2
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Li 도핑에 따른 CuO 광전극의 광전기화학적 특성 개선 연구
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배성찬, 이성혁, 류혁현, 이원재
Korean J. Met. Mater.
2022;60(8):577-586. Published online 2022 Jul 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.577
Abstract
We fabricated a Li doped CuO photoelectrode by doping CuO with Li to improve the photoelectrochemical properties of the CuO photoelectrode. The fabricated Li doped CuO photoelectrode was optimized by experimentally investigating Li doping concentration, annealing temperature, and spin coating deposition cycle. It was confirmed that Li doped CuO had.....
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Web of Science 1
Crossref 3
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고내식 합금도금 PosMAC
®
강판의 개발과 응용 특성
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손일령, 김태철, 주광일, 김명수, 김종상
Korean J. Met. Mater.
2021;59(9):613-623. Published online 2021 Aug 4
DOI:
https://doi.org/10.3365/KJMM.2021.59.9.613
Abstract
PosMAC
®
is a hot dipping Zn-Mg-Al coated steel sheet developed by POSCO. PosMAC
®
3.0 shows excellent anti-corrosion performance and is suitable for construction and solar energy systems in severe corrosive environments. PosMAC
®
1.5 has a superior surface quality and is preferred for automotive and home appliances. The advanced anti-corrosion properties of PosMAC
®
.....
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Web of Science 2
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A-site 조성 제어를 통한 FA기반 페로브스카이트의 상안정화 및 전단 코팅 최적화 연구
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김한솔, 구혜원, 송민주, 정중희, 오용준, 송창은, 홍기하
Korean J. Met. Mater.
2021;59(5):321-328. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.321
Abstract
Halide perovskite solar cells have been attracting tremendous attention as next-generation solar cell materials because of their excellent optical and electrical properties. Formamidinium lead tri-iodide (FAPbI
3
) exhibits the narrowest band gap among lead iodide perovskites and shows excellent thermal and chemical stability, also. However, the large-area coating of FAPbI
3
needed.....
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내식성 향상을 위한 기능성 초발수 스테인리스 스틸 (SUS 304) 표면 연구
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박영주, 정찬영
Korean J. Met. Mater.
2021;59(4):217-222. Published online 2021 Mar 24
DOI:
https://doi.org/10.3365/KJMM.2021.59.4.217
Abstract
Stainless steel is a metal with excellent workability, economy, and corrosion resistance, so it is used in various industrial applications including the marine, machinery, electronic parts, piping, power generation, and nuclear power fields. However, in contaminated environments such as marine and gas pipelines, stainless steel has problems, including surface aging.....
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Web of Science 4
Crossref 4
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염수환경 내 Zn-Al-Mg 합금도금강재의 공정조직 부식거동
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이재원, 오세영, 박보라, 오민석, 김성진
Korean J. Met. Mater.
2020;58(9):610-616. Published online 2020 Aug 19
DOI:
https://doi.org/10.3365/KJMM.2020.58.9.610
Abstract
To clearly understand the effect of the eutectic structure in the Zn-Al-Mg alloy coating on the corrosion behaviors in chloride containing aqueous environments, a bulk Zn-MgZn
2
sample was fabricated by diffusion bonding process, and a variety of experiments, such as electrochemical polarization and galvanic corrosion measurements, salt spray tests, and.....
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Web of Science 7
Crossref 5
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Al-Si 도금층 두께가 22MnB5강의 핫스탬핑 공정 마모에 미치는 영향
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지민기, 손현성, 오진근, 김성우, 김경목, 전태성
Korean J. Met. Mater.
2020;58(8):573-582. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.573
Abstract
Al-Si coated ultra-high strength steels (UHSS) are widely used in automotive applications because of their high strength-to-weight ratio, corrosion protection and good weldability. The hot stamping (also called hot press forming) process is an effective and suitable technique for producing automotive parts from Al-Si coated UHSS. However, critical issues, such.....
More
Web of Science 3
Crossref 3
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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.....
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Web of Science 4
Crossref 3
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Halide activated pack cementation에 의한 silicide 코팅층의 형성에 따른 Nb 합금의 산화거동
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양원철, 정중희, 이상엽, 백경호, 김영무, 이성, 박준식
Korean J. Met. Mater.
2020;58(8):507-514. Published online 2020 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.507
Abstract
In this study, we tried to improve the oxidation resistance of Nb-12Si (wt%) alloys at 1200 °C or higher through pack cementation coatings. Nb-12Si (wt%) alloys were prepared by arc-melting under Ar atmosphere. When the alloys were coated using pack powder mixtures composed of Si, Al
2
O
3
and NaF, two silicide.....
More
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저반사 코팅된 ZnS 윈도우의 8~12 µm 적외선 영역 광학적 특성
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이일주, 홍승찬, 김병삼, 천재경
Korean J. Met. Mater.
2020;58(6):433-438. Published online 2020 May 19
DOI:
https://doi.org/10.3365/KJMM.2020.58.6.433
Abstract
Technologies for pedestrian safety are increasingly emphasized by Automakers in advance of autonomous driving vehicles. A Night Vision System attached behind the front grille can reduce fatal accidents, especially during the nighttime, however, consumers may hesitate to adopt such systems on account of their high price. High-cost Germanium is used.....
More
Web of Science 1
Crossref 1
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온도 제어형 레이저 열처리에 따른 NiCrBSi 및 CoCrWC 용사 코팅층의 나노구조 형성 거동
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천은준
Korean J. Met. Mater.
2020;58(4):247-256. Published online 2020 Mar 10
DOI:
https://doi.org/10.3365/KJMM.2020.58.4.247
Abstract
.For surface hardening of a continuous casting mold component, a thermal spray coating of NiCrBSi (Metco-16C) and CoCrWC (Stellite-1) was performed followed by laser heat treatment of the coatings. To support selective modification of the thermal spray coating, a metallurgically determined surface temperature was maintained during the laser heat treatment,.....
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Web of Science 4
Crossref 5
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무반사 코팅을 위한 MgF
2
나노입자 합성과 박막 부착력 향상을 위한 연구
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송병관, 정재용, 조영래, 나종주, 김정완, 김영국
Korean J. Met. Mater.
2020;58(3):201-206. Published online 2020 Feb 3
DOI:
https://doi.org/10.3365/KJMM.2020.58.3.201
Abstract
Anti-reflective (AR) coatings are popular because they offer high durability with effective reflectance and glare reduction, and they can endure both physical and environmental damage. Magnesium fluoride (MgF
2
) has been used as a nanoparticle coating on AR coating materials by many researchers because they exhibit high transmittance and antireflection characteristics.....
More
Web of Science 2
Crossref 2
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Zn계 합금도금재의 미세구조 및 내식성에 미치는 합금 조성 변화 영향
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이재원, 김성진, 오민석
Korean J. Met. Mater.
2020;58(3):169-174. Published online 2020 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.3.169
Abstract
The effects of alloy composition on the coating structure and corrosion resistance of hot-dip Znbased alloy coated steel products were investigated. Zn-based alloy coating layers with different Al and Mg compositions were fabricated using a batch-type galvanizing simulator. Various intermetallic compounds including Zn, Zn/MgZn
2
binary eutectic, Zn/Al binary eutectoid and.....
More
Web of Science 6
Crossref 5
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핫스탬핑 열처리 온도가 Al-10% Si 도금 30MnB5 강의 점용접성에 미치는 영향
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손성국, 황연정, 이창욱, 유지홍, 최민수
Korean J. Met. Mater.
2019;57(12):778-786. Published online 2019 Oct 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.778
Abstract
Hot stamping is the most efficient manufacturing process to produce high strength automotive parts with reduced springback. Recently, 30MnB5 steel has been developed for hot stamping steel which can provide above 1700 MPa. However, resistance spot weldability of this steel is insufficient due to the need for a large amount.....
More
Web of Science 4
Crossref 4
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Korean J. Met. Mater.
2019;57(11):732-740. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.732
Abstract
To attain high life standards, it is important to develop high-performance non-toxic gas sensors for public safety, environmental pollutant control, industrial processes, etc. Because reports on single element semiconductor-coated semiconducting metal oxides for sensing applications are rare, we synthesized SnO
2
nanowires and coated them with a 5 nm-thick or 10.....
More
Crossref 5
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합금화 용융아연도금 핫스탬핑강의 자동차 차체 적용을 위한 부식 거동, 액상금속취화현상 및 점용접성 연구
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황연정, 이창욱, 신가영, 유지홍, 최민수
Korean J. Met. Mater.
2019;57(3):193-201. Published online 2019 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.3.193
Abstract
The hot stamping process is beneficial for fabricating high strength automotive parts without spring back. To suppress high temperature oxidation and decarburization, it is necessary to coat the hot stamping steel. In the present work, the performance of galvannealed coated (GA) hot stamped steel was evaluated. During cyclic corrosion tests,.....
More
Web of Science 6
Crossref 7
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β
/B2상을 포함한 Ti-Al-Mo-Nb 합금의 산화 거동과 실리콘 화합물 코팅을 통한 내산화성 개선
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최광수, 송영범, 이승훈, 박준식
Korean J. Met. Mater.
2019;57(3):131-137. Published online 2019 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.3.131
Abstract
Alloys containing the β/B2 phases of Ti-45Al-3Mo, Ti-45Al-3Mo-2Nb and Ti-45Al-5Mo were prepared using an vacuum arc-melting machine. Heat-treatments were carried out at 1250 oC in an Ar atmosphere. The temperature of 1250 oC is the temperature region of phase α + γ + (β/B2), and the heat treatment condition which.....
More
Web of Science 2
Crossref 2
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아연-마그네슘-알루미늄 합금도금강판의 도장 내식성 및 밀착성
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이재원, 박보라, 김성진
Korean J. Met. Mater.
2019;57(2):77-83. Published online 2019 Jan 9
DOI:
https://doi.org/10.3365/KJMM.2019.57.2.77
Abstract
Zn-Al-Mg alloy galvanized steel sheets have excellent corrosion resistance and improved cut-edge corrosion resistance. Most of the galvanized steel sheets used for outdoor applications are coated again on the galvanizing layer, or after a plastic film is laminated. As the corrosion products formed by the corrosion of Zn accumulate over.....
More
Web of Science 10
Crossref 7
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신축성 금속 나노선 압저항 전극 기반 로젯 스트레인 센서
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김강현, 차재경, 김종만
Korean J. Met. Mater.
2018;56(11):835-843. Published online 2018 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.11.835
Abstract
In this work, we report a delta rosette strain sensor based on highly stretchable silver nanowire (AgNW) percolation piezoresistors. The proposed rosette strain sensors were easily prepared by a facile twostep fabrication route. First, three identical AgNW piezoresistive electrodes were patterned in a simple and precise manner on a donor.....
More
Crossref 1
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흑연 및 Mo 기판 위에 CVD 성장된 Re 코팅층의 미세조직
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이선규, 남동윤, 배남호, 임성택, 오용준
Korean J. Met. Mater.
2018;56(3):197-204. Published online 2018 Mar 6
DOI:
https://doi.org/10.3365/KJMM.2018.56.3.197
Abstract
Rhenium coatings were fabricated on a graphite substrate at 1100 and 1250
o
C and a molybdenum substrate at 1150 and 1250
o
C by chemical vapor deposition (CVD) using ReCl5 precursor, and the effects of deposition temperatures and substrates on microstructure and crystal orientation were investigated. The rhenium coating on graphite.....
More
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분말소재 특성에 따른 고속화염용사 WC-12Co 코팅층의 미세조직 및 침식 저항성
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강소영, 백경호, 윤상훈, 김형준
Korean J. Met. Mater.
2018;56(2):113-120. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.113
Abstract
WC-Co coatings manufactured by high velocity oxy-fuel (HVOF) spraying have a superior hardness and wear resistance. In this study, HVOF-sprayed WC-12Co coatings from three different feedstock powders were evaluated in terms of microstructural features, carbide decomposition and erosion resistance. The fused-crushed and the sintered-crushed WC-12Co powders had an angular shape,.....
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전기화학적 순환부식 시험법을 활용한 자동차 로어암의 단품단위 부식평가에 관한 연구
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김선홍, 이지훈, 김정구, 장민
Korean J. Met. Mater.
2018;56(2):103-112. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.103
Abstract
This research focused on the development of the part unit evaluation for an organic coated automotive lower arm using the electrochemical cyclic corrosion test (E-CCT). The E-CCT accelerates both the coating degradation and the perforation corrosion. The applied potential for the coating degradation was determined to be -500 mV
SCE
for.....
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용사코팅 YSZ 고체 전해질이 응용된 NiO･YSZ 가스센서의 특성
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방일환, 조성용
Korean J. Met. Mater.
2017;55(11):819-824. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.819
Abstract
A mixed potential-type NiO･YSZ (yttria stabilized zirconia) gas sensor employing 8YSZ solid electrolyte film was fabricated using a thermal spray coating method, and tested in a NO
2
atmosphere at various operating temperatures. The thermal spray coating method is useful for mass producing solid electrolytes without a forming, sintering or bonding.....
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Korean J. Met. Mater.
2017;55(11):768-776. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.768
Abstract
A thin, compact, and uniform cobalt layer was coated on ferritic stainless steel (Crofer 22 APU) by high frequency square pulsed electrodeposition in an aqueous solution containing cobalt chloride and boric acid. The effects of various electrodeposition parameters and post heat treatment on the morphology, thickness, roughness and adhesion of.....
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Korean J. Met. Mater.
2017;55(8):581-586. Published online 2017 Aug 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.8.581
Abstract
The near-infrared (NIR) reflecting properties of TiO
2
/Ag /TiO
2
(TAT) multilayers deposited using DC/RF magnetron sputtering were investigated. For high transmittance and reflectance in the visible and NIR ranges, respectively, the thickness of each layer was theoretically optimized by the index matching method. As the Ag layer thickness increased, the.....
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스프레이 코팅법으로 증착된 은나노선의 특성에 미치는 분산용매의 영향
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최지혜, 장아연, 김정희, 정중희, 홍기하
Korean J. Met. Mater.
2017;55(7):509-514. Published online 2017 Jul 4
DOI:
https://doi.org/10.3365/KJMM.2017.55.7.509
Abstract
Silver nanowire (AgNWs) networks offer a promising approach for producing cost effective transparent electrode materials. However, high temperature annealing is necessary to achieve low sheet resistance, which limits the use of AgNWs for low temperature processing applications such as flexible electronics, and perovskites solar cell fabrication. This study shows that.....
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화학반응법을 이용한 Cu-coated 복합분체 합성
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장준호, 박현국, 임재원, 오익현
Korean J. Met. Mater.
2017;55(5):315-319. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.315
Abstract
In this paper, Cu-coated graphite powders for a low thermal expansion coefficient and a high thermal conductivity are fabricated using a chemical reaction process. The Cu particles adhere to the irregular graphite powders and they homogeneously disperse in the graphite matrix. Cu-coated graphite powders are coarser at approximately 3~4 ㎛.....
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