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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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Korean J. Met. Mater.
2020;58(12):843-851. Published online 2020 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2020.58.12.843
Abstract
In this study, oxide (Y
2
O
3
)-embedded Ni particles were fabricated via a new process. The process involves the mechanical hydrogenation of Ni–Y alloy into Ni–YH
2
and the selective oxidation of Ni–YH
2
to Ni–Y
2
O
3
. The alloy powders were prepared for sintering by the mechanical alloying of a mixed powder. The powder was.....
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Korean J. Met. Mater.
2020;58(11):798-807. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.798
Abstract
Facile, economic methods of preparing tungsten (W) nanopowder are critically needed to meet industrial demand. Herein, we report a method of preparing single-phase alpha-W (α-W) nanopowders using ammonium paratungstate (APT) as a starting material and the optimum synthesis conditions. The process involves two stages: i) the radio-frequency (RF) induction thermal.....
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Cited By 1
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Fe 함량변화에 따른 텅스텐카바이드 초경소재의 특성평가
J
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김주훈, 이정한, 장준호, 오익현, 홍성길, 박현국
Korean J. Met. Mater.
2020;58(8):533-539. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.533
Abstract
In this study, consolidated WC-Fe compacts as a function of Fe contents were fabricated by a spark plasma sintering method, following the mixed by the ball-milled powder. Fe among the metallic binders was added to WC enhance not only the driving force of sintering process but also suppressing the grain.....
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Cited By 1
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Zn 도핑이 Cu
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Se의 상전이 거동과 열전수송특성에 미치는 영향
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진승현, 임영수
Korean J. Met. Mater.
2020;58(7):466-471. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.466
Abstract
We report on the phase transition behavior and thermoelectric transport properties of Zn-doped Cu
2
Se. Cu
2
Se is comprised of nontoxic, low-cost and abundant elements, and has been attracting attention because of its very high thermoelectric performance,
ZT
, at high temperatures. Many studies have reported enhanced
ZT
in impurity doped Cu
2
Se, however,.....
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액상플루오르카본전구체(Liquid Fluorocarbon Precursor)의 기화를 이용한 흡착 및 회수
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박준영, 오병문, 김경남
Korean J. Met. Mater.
2020;58(6):397-402. Published online 2020 May 14
DOI:
https://doi.org/10.3365/KJMM.2020.58.6.397
Abstract
PFC gas is primarily used during the etching process in the manufacture of ULSIs and in cleaning after CVD processes. PFC is classified as a greenhouse gas that stays in the atmosphere for a long time and has a high GWP. High capacity and high integration have been achieved in.....
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산화물 환원공정에 의해 제작된 n-형 Bi
2
Te
2.7
Se
0.3
화합물의 열전특성연구
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임영수, 박배건, 이길근
Korean J. Met. Mater.
2020;58(5):334-339. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.334
Abstract
We report the thermoelectric transport properties of n-type Bi
2
Te
2.7
Se
0.3
compounds prepared by oxide-reduction process. The oxide-reduction process is a recently developed method that can synthesize Bi2Te3-based compounds using only oxide starting materials, which is advantageous in terms of the diversity of the starting materials and cost efficiency. In this study,.....
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AZ31 마그네슘 합금의 플라즈마전해 산화막 두께 성장에 따른 내식특성
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최보은, 정원섭, 김용환
Korean J. Met. Mater.
2020;58(2):87-96. Published online 2020 Jan 8
DOI:
https://doi.org/10.3365/KJMM.2020.58.2.87
Abstract
The growth of the PEO coating with processing time on an AZ31B magnesium alloy in a dilute alkaline electrolyte containing silicate and the corrosion characteristics according to its thickness were investigated. The oxide film grew a porous outer layer mainly consisting of silicate with the spark discharge phenomenon from the.....
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Korean J. Met. Mater.
2019;57(9):609-616. Published online 2019 Aug 21
DOI:
https://doi.org/10.3365/KJMM.2019.57.9.609
Abstract
We employed spark plasma sintering (SPS) in the presence of sintering aids to fabricate high-quality Ho
3+
,Yb
3+
-co-doped Y
2
O
3
transparent ceramics suitable for use as a laser gain medium, and analyzed their microstructure and optical properties. Ho
3+
,Yb
3+
-co-doped Y
2
O
3
transparent ceramics with different contents of Yb
3+
were fabricated by SPS and exhibited high.....
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Cited By 3
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용융방사법으로 제작된
p
-type 다결정 Si의 열전특성 연구
J
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선주형, 임영수
Korean J. Met. Mater.
2018;56(9):686-692. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.686
Abstract
Thermoelectric energy conversion has attracted much attention as an efficient and environment-friendly energy technology. Thermoelectric energy conversion performance is directly influenced by the figure of merit (
ZT
) of the thermoelectric material, however, most known thermoelectric materials with high
ZT
contain toxic and/or scarce elements. Herein, we report the thermoelectric properties.....
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Cited By 1
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Korean J. Met. Mater.
2018;56(3):235-243. Published online 2018 Mar 6
DOI:
https://doi.org/10.3365/KJMM.2018.56.3.235
Abstract
The optimal design of electrical initiation devices for explosive charges and other high energy materials critically depends on the bridge burst or the electrical explosion of the thin-film metallic bridges. It is therefore quite important to select the right material with suitable explosion properties for the metallic bridge film. However,.....
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마그네슘 합금의 플라스마전해산화 코팅에 영향을 미치는 제반 요소들에 대한 고찰
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심건주
Korean J. Met. Mater.
2017;55(5):296-307. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.296
Abstract
Magnesium alloys, which possess excellent specific strength and castability, are highly susceptible to corrosion. Although anodizing is widely used to resolve this problem, it requires toxic electrolytes and produces relatively thin and weak surface coatings. Recently, plasma electrolytic oxidation (PEO) has emerged as an alternative to anodizing. Although it is...
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Cited By 6
Powder Metallurgy
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용사 코팅한 ZrO
2
/W/Mo-Graphite 코팅층의 2100 ℃ 열처리 후 미세조직 변화에 관한 연구
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안규백, 최경환, 김상섭, 조규섭
Korean J. Met. Mater.
2016;54(8):559-565. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.559
Abstract
A tungsten coating was deposited onto a graphite substrate using the atmospheric plasma spraying (APS) technique. In order to increase the adhesion strength between the metallic tungsten(W) and graphite, a molybdenum (Mo) interlayer was pre-deposited onto the graphite surface by utilizing the APS technique. Also, after deposition of a APS-W.....
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Cited By 4
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