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Korean J. Met. Mater.
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친환경 Ti 및 TiH
2
분말 제조를 위한 TiO
2
의 칼슘열환원에 대한 기초연구
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박성훈, 강정신, 손호상
Korean J. Met. Mater.
2024;62(3):190-203. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.190
Abstract
To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO
2
) was investigated. The mechanism involved in the reduction of TiO
2
using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl
2
), on the calciothermic reduction was investigated by conducting experiments at 1123.....
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Er 합금 원소 첨가를 통한 인장 물성과 절삭성이 우수한 Ti 합금 개발
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최이슬, 오정목, 박찬희, 이욱진, 박용호, 원종우
Korean J. Met. Mater.
2024;62(3):171-179. Published online 2024 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.171
Abstract
This study demonstrates that the addition of the rare earth element Erbium (Er) significantly enhances the machinability and tensile properties of titanium (Ti). Pure Ti alloys and Er-added Ti alloys with 0.5-1.1 wt.% Er content were prepared, and their microstructure, machinability, and tensile properties were compared. Two different types of.....
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Ti-5Mo-2Fe 합금의 시효처리 조건에 따른 미세조직 변화 및 기계적 특성
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김홍민, 박세영, 이동근
Korean J. Met. Mater.
2023;61(8):545-552. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.545
Abstract
Beta-type titanium alloys have a low elastic modulus, excellent cold workability, and are widely used as implant materials. High strength is possible by forming a precipitation in the β-matrix via solution treatment and aging treatment. However, beta titanium alloys require a large amount of beta-stabilizing elements (Fe, Nb, Mo, Ta,.....
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Web of Science 1
Crossref 3
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Korean J. Met. Mater.
2021;59(3):149-154. Published online 2021 Feb 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.3.149
Abstract
In this study, an effective method is demonstrated for fabricating titanium sputtering targets, which are used to fabricate thin films in the semiconductor industry. The method is an alternative to the existing electron beam melting (EBM) process under high vacuum. Titanium sputtering targets used in the production of semiconductors must.....
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Web of Science 4
Crossref 4
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Korean J. Met. Mater.
;59(2):113-120. Published online 2021 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2021.59.2.113
Abstract
Ti has excellent properties but is more expensive than other materials due to its high melting point, high reactivity and difficult processability. One way to lower the production cost of Ti products is to recycle Ti scraps. Before recycling Ti scraps, pretreatment to remove contamination is essential. Ti scraps can.....
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Web of Science 2
Crossref 3
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대기압의 공기 분위기에서 촉매를 사용하지 않는 열증발법을 이용하여 생성된 TiO
2
나노구조
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이근형
Korean J. Met. Mater.
2020;58(5):353-356. Published online 2020 Apr 14
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.353
Abstract
TiO
2
nanostructures were synthesized using a thermal evaporation method without a catalyst. TiO powders mixed with graphite powders were used as the source materials. The synthesis process was performed in air atmosphere at 1000 °C. When the mass ratio of TiO/graphite in the source material was 2:1, TiO
2
nanowires and.....
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Web of Science 3
Crossref 5
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초탄성 티타늄 합금의 인장 변형거동 고찰
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정혜진, 르우비엣띠엔, 정용하, 홍성태, 한흥남
Korean J. Met. Mater.
2020;58(3):162-168. Published online 2020 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.3.162
Abstract
A superelastic titanium alloy was subjected to uniaxial tensile deformation at room temperature. The microstructural evolution and deformation mechanisms of the superelastic titanium alloy were investigated by electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). Multiple deformation mechanisms including stress-induced martensitic transformation (SIMT), dislocation slip, {332}<113> and {112}<111> mechanical twinning.....
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Web of Science 5
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생체의료 임플란트용 개기공 티타늄 다공체 제조
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김경욱, 장진만, 김용대, 이재철, 이원식
Korean J. Met. Mater.
2019;57(10):679-687. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.679
Abstract
Open-pored metal foams have been partly used for orthopedic or dental applications because of their good bone ingrowth behavior and low elastic modulus. In this paper, we report a method that can produce open-pored Ti foams using a technique that combines the powder injection molding process and feedstocks containing expandable.....
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Web of Science 3
Crossref 3
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Korean J. Met. Mater.
2019;57(9):569-574. Published online 2019 Aug 21
DOI:
https://doi.org/10.3365/KJMM.2019.57.9.569
Abstract
In this study, an eco-friendly pretreatment process was developed to recycle titanium turning scraps and ferro-titanium ingots with low gaseous impurities were prepared using recycled titanium turning scraps. The amount of gaseous impurities of titanium scraps before removing the machining oils on the surface was as high as 20000 ppm......
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Web of Science 6
Crossref 5
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코크스와 염소가스에 의한 일메나이트 광석 중 Fe의 선택염화 제거
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이소영, 박성훈, 손호상
Korean J. Met. Mater.
2019;57(3):146-153. Published online 2019 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.3.146
Abstract
This study on the chlorination of ilmenite ore was carried out using chlorine gas and coke as the chlorinating and reduction agents in a static bed reactor for the selective removal of iron. The effect of the amount of coke, the partial pressure of the chlorine gas and the reaction.....
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Web of Science 2
Crossref 4
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Korean J. Met. Mater.
2018;56(12):900-909. Published online 2018 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.12.900
Abstract
A ZnO/TiO2 photocatalyst decorated with PbS quantum dots (QDs) was synthesized to achieve high photocatalytic efficiency for the decomposition of dye in aqueous media. A TiO2 porous layer, as a precursor photocatalyst, was fabricated using micro-arc oxidation, and exhibited irregular porous cells with anatase and rutile crystalline structures. Then, a.....
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Crossref 11
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Korean J. Met. Mater.
2018;56(3):205-209. Published online 2018 Mar 6
DOI:
https://doi.org/10.3365/KJMM.2018.56.3.205
Abstract
The optimum acid cleaning conditions for removing CaO formed by the reaction of Ca with Ti powder were investigated in this study. In this experiment, we used Ti powders composed of irregular polygonal Ti particles with average sizes of 125 mm and 250 μm. Ca granules were charged at 50%.....
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Korean J. Met. Mater.
2017;55(9):615-623. Published online 2017 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2017.55.9.615
Abstract
Mill-annealed Ti-6Al-4V (Ti64) sheets were formed into rectangular shaped pans with two square recesses by the superplastic forming (SPF) technique under high pressure using commercial grade argon gas. The SPF process induced a significant decrease in the tensile ductility and high cycle fatigue (HCF) resistance of the Ti64 alloy. The.....
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침입형 탄소 확산을 이용하여 제조한 고강도 Ti 합금
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김보영, 고세현, 이재철
Korean J. Met. Mater.
2017;55(5):342-347. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.342
Abstract
Feasibility studies are performed to determine the suitability of a novel simple synthesis technique for fabricating a new Ti alloy with improved strength and ductility, while exhibiting lower cell toxicity. Through consolidating pure Ti powders under a C atmosphere at elevated temperatures, a bulk form of the Ti alloy, in.....
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Crossref 1
Modeling and Simulation
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저항가열 초크랄스키법에 의한 야그 단결정 성장의 전산모사 연구
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유명현, 차필령
Korean J. Met. Mater.
2017;55(1):60-66. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.60
Abstract
Yttrium Aluminum Garnet (YAG) single crystal has received much attention as the high power solid-state laser’s key component in industrial and medical applications. Various growth methods have been proposed, and currently the induction-heating Czochralski (IHCZ) growth method is mainly used to grow YAG single crystal. Due to the intrinsic properties.....
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Optical Devices & Energy Materials
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수열합성법으로 성장시킨 TiO
2
나노로드의 형태학적, 구조적, 광전기화학적 특성 연구
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최하영, 류혁현, 이원재
Korean J. Met. Mater.
2017;55(1):46-52. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.46
Abstract
We investigated the effects of growth duration on the morphological, structural, and photoelectrochemical properties of TiO
2
nanorods grown on a TiO
2
-buffered fluorine-doped tin oxide (FTO) substrate using the hydrothermal method. From the study, we found that the photoelectrochemical properties were mainly dependent on the nanorod length and (002) XRD peak.....
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Crossref 2
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FeB와 TiH
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혼합분말의 유성볼밀 및 후속열처리에 의한 Fe-TiB
2
나노복합분말 in situ 제조
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Xuan-Khoa Huynh, 배선우, 김지순
Korean J. Met. Mater.
2017;55(1):10-15. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.10
Abstract
Fe-TiB
2
powder was synthesized in-situ by the planetary ball milling and subsequent heat-treatment of an iron boride (FeB) and titanium hydride (TiH
2
) powder mixture. Mechanical activation of the (FeB+TiH
2
) powder mixtures was observed after a milling time of 3 hours at 700 rpm of rotation speed, but activation was not.....
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Crossref 4
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Ti-39Nb-6Zr 합금의 시효처리를 통한 미세조직 및 기계적 특성 제어
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권현준, 임가람, 이용태, 이동근, 이준희, 김승언
Korean J. Met. Mater.
2016;54(12):925-930. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.925
Abstract
The aim of this study is to optimize the microstructure and mechanical properties of Ti-39Nb-6Zr (TNZ40) for bio-implant applications. TNZ40 was designed to have a low elastic modulus (~40 GPa) and good biocompatibility. However, the alloy shows relatively low strength compared to other titanium alloys for bio-implant. In the present.....
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Crossref 5
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