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Korean J. Met. Mater.
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Korean J. Met. Mater.
2024;62(4):299-305. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.299
Abstract
To improve the hydrogen-storage properties of Mg
2
Ni, LiBH
4
was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg
2
Ni-10LiBH
4
was prepared with a composition of 90 wt% Mg
2
Ni + 10 wt% LiBH
4
. The quantity of released hydrogen (H
r
) versus temperature T curve for Mg
2
Ni10LiBH
4
was obtained by heating at...
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폐리튬배터리(LIBs)에서 유가금속(Ni, Co, Mn, Li) 회수 시 발생하는 황산나트륨의 처리 및 회수 연구
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조연철, 서민혁, 이영재, 안재우
Korean J. Met. Mater.
2024;62(4):275-283. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.275
Abstract
Concerns have arisen regarding the high concentrations of sodium sulfate in wastewater resulting from the waste Li-ion battery wet recycling process. In addressing this issue, Bipolar electrodialysis was employed to desalinate high-concentration sodium sulfate and recover it as sulfuric acid and sodium hydroxide. The investigation encompassed various experimental variables, such...
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유연 압저항 센서에 적용되는 나노 소재 및 구조 설계에 대한 최신 연구 동향
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강여울, 이정우
Korean J. Met. Mater.
2024;62(3):239-249. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.239
Abstract
This review provides an overview of recent advances in the materials and structural design of flexible piezoresistive sensors, which are of significant interest as smart devices in the Fourth Industrial Revolution. Recent research has focused on addressing demand for a wide pressure range and high sensitivity for use in diverse.....
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진공 브레이징을 통해 제조한 TiAl/HI-TEMP 820/SCM440H 재료의 공정 온도에 따른 미세조직 및 기계적 특성 평가
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유상규, 김지원, 이초롱, 오명훈, 최인철
Korean J. Met. Mater.
2024;62(3):229-238. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.229
Abstract
The TiAl alloy is attracting attention as a lightweight and heat-resistant material, because of its high specific strength, excellent high-temperature formability, and fatigue strength. However, its applications are limited by its high unit price and low room temperature ductility. To overcome this issue, dissimilarly bonded materials have been extensively employed......
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계면 스위칭 멤리스터 소자 구조와 신경망 회로 성능에 대한 시뮬레이션 연구
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송윤혁, 임지민, Sagar Khot, 정동명, 권용우
Korean J. Met. Mater.
2024;62(3):212-221. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.212
Abstract
In this study, the architecture of an interfacial switching memristor, which has a metal-insulatormetal structure of Pt/SrTiO
3
/Nb-SrTiO
3
was investigated. The performance of a neural network that uses memristors as its synapse components was also examined with system-level simulations. A finite element solver, COMSOL Multiphysics, was used to simulate synaptic device.....
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반데르발스 소재 기반의 태양전지 적용에 관한 최신 연구동향 리뷰
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박형기, 이재현, 허근
Korean J. Met. Mater.
2024;62(2):154-161. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.154
Abstract
In recent years, the exploration of van der Waals materials has taken center stage in the field of advanced materials research. Studies have delved deeply into the multifaceted characteristics of these materials, and in particular their potential applications in solar cell technology. Van der Waals materials, named after the unique.....
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금속산화물 나노구조체를 이용한 화학저항식 가스센서의 최신 연구동향
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고재권, 박인혁, 심영석, 홍구택, 권기창
Korean J. Met. Mater.
2024;62(2):142-153. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.142
Abstract
In the modern era, advanced industrial and process technologies in various fields are known to produce harmful gases. These gases typically leak at low concentrations, but continuous exposure can cause serious harm to health and safety. Since human sensory organs cannot detect these risks or leaking hazardous gases, there has.....
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Ni-Fe bimetallic oxides 촉매의 CO, NO 가스상 오염물질 동시저감 특성
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김운기, 정재일, 이명진, 정보라, 예보라, 이희수, 김홍대
Korean J. Met. Mater.
2024;62(2):115-124. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.115
Abstract
Many studies have been conducted on methods to remove air pollutants. Among them, a representative commercial technology for reducing nitrogen oxides (NO
X
) is selective catalytic reduction (SCR) using NH
3
as a reductant. However, the NH
3
-SCR technology has problems, such as the need for additional NH
3
gas (Active-SCR), the fact that.....
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p/n PbSe 다이오드의 제조 및 전기적 특성 평가
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황보석호, 이제원
Korean J. Met. Mater.
2024;62(2):94-105. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.94
Abstract
Lead selenide (PbSe) diodes were fabricated using a magnetron sputtering process system with a pulsed DC power supply and a 2-inch PbSe target with a purity of 5N. For p-type PbSe thin films, the process variable was the oxygen ratio in the mixed gas of argon and oxygen. The electrical.....
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SS304L 표면 오염물질 제거를 위한 고출력 레이저 클리닝 영향 분석
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최수진, 유현종, 최지연, 노지환, 강희신, 안상훈, 박준수, 최필공, 김도현, 김영규, 김병주, 전익근, 김정오, 손현기, 김경한, 박창규
Korean J. Met. Mater.
2024;62(2):73-80. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.73
Abstract
In this study, artificially formed corrosion and paint layers on 304L stainless steel (SS304L) specimen were removed using a kilowatt level high-power Nd:YAG laser. A laser power of 1140 W and a pulse duration of 89 ns were used for the corrosion removal, and a laser power of 850 W.....
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재료선택: 데이터 마이닝의 군집분석과 연관규칙분석을 이용한 재료지각 데이터 분석
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최재호
Korean J. Met. Mater.
2024;62(1):65-72. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.65
Abstract
To select materials suitable for products, material perception, which is the feeling consumers have about materials, has been studied. Material perception data were obtained through surveys using digital logic for bipolar adjective pairs. The material perception data were analyzed through unsupervised learning of data mining. Prior to data analysis, to.....
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이중 인공지능을 이용한 Al 7075 합금에서의 압광 균열 진단 연구
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박태오, 신윤우, 이승환, 좌비오, 권용남, Suman Timilsina, 장성민, 조철우, 김지식
Korean J. Met. Mater.
2023;61(12):958-964. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.958
Abstract
The phenomenon of mechanoluminescence (ML) refers to the emission of light induced by mechanical stimulation applied to mechano-optical materials for example SrAl
2
O
3
:Eu,Dy (SAO). Numerous technologies on the basis of ML have been presented to visualize the stress or strain in various structures for the applications including structural health monitoring. As.....
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WC-20wt%Co 초경 합금의 미세 조직 변화에 따른 인장 및 피로 성질
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조규섭, 김경일, 노우람
Korean J. Met. Mater.
2023;61(12):933-942. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.933
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging dies and cutting tools. The tensile and fatigue properties of WC-20wt%Co cemented carbides with microstructural variations were investigated. Microstructure parameters such as Co binder content, WC particle size, binder mean free path,.....
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Bi 도핑에 따른 SnTe의 상온 최대 열전성능지수 예측
J
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이준하, 박현진, 김정연, 서원선, 양희선, Umut Aydemir, 김세윤, 신원호, 김현식
Korean J. Met. Mater.
2023;61(12):915-922. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.915
Abstract
SnTe has drawn much attention due to its Pb-free composition along with tunable electronic and lattice structures. However, its intrinsically high defect concentration and high lattice thermal conductivity (
κ
1
) have hindered its application in devices. Recently, Bi doping at Sn-sites in Sn
1-
x
Bi
x
Te (
x
= 0.0 – 0.08) has been demonstrated.....
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설명 가능한 인공지능으로 해석한 Al-Sc-X 합금의 경도 예측 기계학습 모델과 역설계
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박지원, 김수현, 김지수, 김병주, 천현석, 오창석
Korean J. Met. Mater.
2023;61(11):874-882. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.874
Abstract
In this study, the Vickers hardness of precipitation-strengthened Al-Sc-X (X = Zr, Si, and Fe) alloys were predicted using machine learning models, depending on the alloys’ compositions, solid-solution treatment and aging conditions. The data used for machine learning were collected from the literature. Among the models, tree-based ensemble models such.....
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이산화바나듐 나노플라워 구조 최적화를 통한 리튬-황 전지의 폴리설파이드 셔틀 효과 완화
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정수환, 최현준, 이상준, 이동박, 엄수윤, 문산, 윤종혁, 김주형
Korean J. Met. Mater.
2023;61(11):849-856. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.849
Abstract
With the rapid development of portable devices and Energy Storage Systems (ESS), secondary batteries with high energy density and high capacity are in great demand. Among various candidates, Lithium-sulfur (Li-S) batteries have been considered for next-generation energy devices given their high theoretical capacity (1675 mAh g
-1
) and energy density (2500.....
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복합화력발전 내 배열회수 보일러용 소재(탄소강 계열 및 듀플렉스 스테인리스강(UNS S32205))의 황산농도에 따른 부식거동 비교 연구
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장유성, 박진성, 홍승갑, 김성진
Korean J. Met. Mater.
2023;61(11):830-841. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.830
Abstract
This study examined the effects of sulfuric acid concentrations on the corrosion behaviors of three types of commercial steels, conventional carbon steel (SA192), sulfuric acid dew resistant steel (S-TEN), and duplex stainless steel (S32205), considered to be potential materials for the heat recovery steam generator (HRSG) in combined cycle power.....
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DC 마그네트론 스퍼터링에서 입방정 질화붕소 박막의 증착 거동에 미치는 이온 플럭스 변화의 영향
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최영환, 허주열, 백영준
Korean J. Met. Mater.
2023;61(11):824-829. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.824
Abstract
Cubic boron nitride (cBN) thin films were deposited using DC magnetron sputtering, and the effect of the ion flux on the deposition behavior and residual stress of the cBN thin films was investigated. To increase the ion flux, the magnetic force ratio of the central/peripheral permanent magnets inserted in the.....
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압력 센서용 탄소 나노 튜브 폴리머 복합체의 필러 함량과 종횡비에 따른 압저항 특성
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유종찬, 김동영, 이동관, 남건우, 박성훈
Korean J. Met. Mater.
2023;61(10):793-799. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.793
Abstract
Polymer composites enriched with conductive fillers hold immense potential for flexible pressure sensors, because of the remarkable piezoresistive effect they possess. Research on polymer composite pressure sensors has been actively ongoing because of their flexibility and high electrical resistance performance. This paper presents a comprehensive comparison of the piezoresistive characteristics.....
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L-DED 공정으로 제조된 AISI 316L 스테인리스 스틸의 적층 형상 및 특성에 미치는 공정 변수의 영향
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박지영, 남현지, Qing-Ye Jin, 이욱진
Korean J. Met. Mater.
2023;61(10):760-771. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.760
Abstract
In this study, AISI 316L stainless steels were manufactured by the L-DED process with various laser scanning speeds and laser powers, in order to analyze how volumetric energy density (VED) can affect their final shape, microstructure and mechanical properties. Under various VED conditions, it was found that a higher VED.....
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Ti-12.1Mo-1Fe 준안정 베타 합금의 변형 거동에 대한 변형률 속도의 영향
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진인경, 이동근
Korean J. Met. Mater.
2023;61(10):741-747. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.741
Abstract
The addition of expensive elements to β titanium alloys, which are widely used in the aerospace and automobile industries, causes their price to increase. Low-cost, high-strength alloy (Ti-12.1Mo-1.0Fe) was designed in this study and the compressive behaviors of this alloy were evaluated for application to automobile parts, etc. As a.....
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SA508 Gr.4N Ni-Cr-Mo계 고강도 원자로압력용기용 저합금강의 템퍼취화 거동에 미치는 이상영역 열처리의 영향
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홍석민, 이초롱, 이봉상, 김홍덕, 김민철
Korean J. Met. Mater.
2023;61(10):729-740. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.729
Abstract
To analyze the effects of intercritical heat treatment on the temper embrittlement of SA508 Gr.4N steels, two model alloys with different phosphorus (P) contents were fabricated. Each sample was heat treated by applying a conventional heat treatment process (quenching-tempering) with/without an intercritical heat treatment process (IHT) and a step-cooling heat.....
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산소함량에 따른 Ti-6Al-4V 적층제조 조형체의 미세조직 및 기계적 특성 변화
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강태진, P.L. Narayana, 최성우, 김재혁, 홍재근, 이태경
Korean J. Met. Mater.
2023;61(9):714-720. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.714
Abstract
Titanium alloys are used in many fields including military, aerospace, and biomedical because of their excellent specific strength, corrosion resistance, and biocompatibility. Recently, much research has been focused on addressing the disadvantages of conventional manufacturing methods, including reducing material and energy waste when manufacturing titanium alloy parts by additive manufacturing.....
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Web of Science 1
Crossref 2
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채색안료로 사용되는 천연 및 합성 Azurite의 특성 및 안정성 연구
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박주현, 김명남, 박세린, 이선명
Korean J. Met. Mater.
2023;61(9):704-713. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.704
Abstract
Azurite is an inorganic pigment commonly used in traditional painting arts and even today. This pigment has two types: natural azurite and synthetic artificial azurite, called blue verditer or blue bice. Because they have the same structure and similar appearance they are difficult to distinguish. The purpose of this study.....
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Debye-Callaway 모델 기반 Yb(Cd
1-
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Mg
x
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2
Sb
2
열전 합금의 격자 열전도도 분석
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허민수, 권승환, 서원선, 김상일, 김현식
Korean J. Met. Mater.
2023;61(8):608-615. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.608
Abstract
YbCd
2
Sb
2
-based Zintl phases have been identified as promising materials for thermoelectric applications due to their high Seebeck coefficient and electrical conductivity. However, their high thermal conductivity limits their overall thermoelectric performance. To address this, Mg has recently been introduced as an alloying element at Cd atomic sites to reduce the.....
More
Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2023;61(8):602-607. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.602
Abstract
Recently, transition metal dichalcogenides (TMDCs) with 2D structure have attracted interest due to their many unique optical and electrical properties. The primary preparation methods for 2D materials are chemical vapor deposition (CVD), exfoliation, and other vacuum technologies. Large-scale synthesis of WS
2
via solution-process is rare due to the higher temperature.....
More
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열전 복합체 필름을 이용한 스트레쳐블 에너지 하베스팅 소자 개발
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김철민, 박귀일
Korean J. Met. Mater.
2023;61(8):594-601. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.594
Abstract
Thermoelectric energy harvesting has attracted a lot of attention for powering self-powered devices because of the potential to generate energy anywhere with a temperature difference. In particular, a stretchable thermoelectric generator (S-TEG) can be applied to the repetitively moving parts of a machine and even a human body. Herein, we.....
More
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전기수력학 젯 기술을 이용한 아연-주석 산화물 박막트랜지스터에서 첨가제에 의한 전기적 특성 향상
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최운섭, 이영직, 김용재
Korean J. Met. Mater.
2023;61(8):589-593. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.589
Abstract
Oxide thin-film transistors (TFTs) are important semiconductor materials for display backplanes. To fabricate flexible displays, not only display modes but also TFTs are important. Flexible TFTs are especially needed for flexible displays, and related processes need to be developed. Printing is a good choice for the new fabrication of oxide.....
More
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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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개질된 COG (coke oven gas)를 이용한 2단 DRI (direct reduced iron) 공정의 공정변수 결정
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고민정, 김수영, 조종오, 이재랑, 김용하, 원용선
Korean J. Met. Mater.
2023;61(8):573-580. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.573
Abstract
On the road to carbon neutrality, a great deal of attention is being paid to emerging technologies such as the DRI (direct reduced iron) process. This study proposes a two-stage DRI process using reformed COG (coke oven gas), and determined optimal process parameters. The reduction and carbonization of Carajás iron.....
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Journal Impact Factor 1.2