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251 |
Effect of Fe Composition and Heat Treatment Temperature on the Transformation Temperature of R-Phase of Ti-Ni-Fe Alloy
Ti-Ni-Fe 합금의 R상 변태온도에 미치는 Fe 조성과 열처리 온도의 영향
Wonseok Kim, Nayoung Keum, Jinyoung Kim, Jaeil Kim김원석, 금나영, 김진용, 김재일
Korean J. Met. Mater. 2024;62(4):251-256. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.251
Abstract
R-phase transformations in TiNi shape memory alloys (Nitinol) have various applications because of their small thermal hysteresis and low fatigue resistance. Adding a third element such as Fe or Al is one of the useful ways to induce R-phase transformation. Controlling the R-phase transformation temperature is crucial for industrial and... More
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257 |
A Novel Al-Al2O3 Non-Skid Composite Coating with Improved Wear Resistance Fabricated by Twin Wire Arc Spraying
Twin wire arc spray 공정을 통해 제작된 Al-Al2O3복합소재 미끄럼 방지 코팅의 우수한 마모 저항성
Hansol Kwon, Youngjin Park, Yongjin Kang, Dohyun Kim, Uk Hee Nam, Eungsun Byon권한솔, 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 2O 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 2O 3 coatings. The Al-Al 2O 3 coatings showed..... More
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267 |
Effect of Grain Size on High Temperature Oxidation Behavior of IN792 Superalloy
IN792 초내열 합금의 고온 산화 거동에 미치는 결정립 크기의 영향
Ji-Ye Bang, Dong-Hyun Lee, Soo Yeol Lee방지예, 이동현, 이수열
Korean J. Met. Mater. 2024;62(4):267-274. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.267
Abstract
It is known that Ni-based superalloys possess superior mechanical properties in high-temperature and high-pressure environments. One of the drawbacks of these alloys is their tendency to oxidize at high temperatures. Improving their oxidation properties and obtaining a fundamental understanding of the underlying mechanism of their oxidation behavior are critical for..... More
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275 |
A Study on the Treatment and Recovery of Sodium Sulfate (Na2SO4) Generated When Recovering Valuable Metals (Ni, Co, Mn, Li) from Waste Lithium Ion Batteries(LIBs)
폐리튬배터리(LIBs)에서 유가금속(Ni, Co, Mn, Li) 회수 시 발생하는 황산나트륨의 처리 및 회수 연구
Yeonchul Cho, Minhyuk Seo, Youngjae Lee, Jaewoo Ahn조연철, 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..... More
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284 |
Surfactant Composition Dependent Evolution of Electronic/Structural Properties of P3HT Nanoparticle Colloids Synthesized via Mini-Emulsion Technique
Byoung-Nam Park
Korean J. Met. Mater. 2024;62(4):284-291. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.284
Abstract
: This study investigates the influence of surfactant (sodium dodecyl sulfate, SDS) concentration on the size and optoelectronic properties of poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) synthesized via the mini-emulsion technique. P3HT NPs were fabricated with varying SDS concentrations. The size dependent optoelectronic properties, including the highest occupied molecular orbital (HOMO) and..... More
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292 |
Tuning Dielectric Constant of P3HT by Ultrasound-Induced Aggregation
Byoung-Nam Park
Korean J. Met. Mater. 2024;62(4):292-298. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.292
Abstract
Poly(3-hexylthiophene) (P3HT), a semiconducting polymer, is integral to the development of organic electronic devices. Its optoelectronic properties are significantly influenced by the nature of its intermolecular interactions, predominantly classified as J-type and H-type couplings. This study investigates the effect of sonication on the dielectric properties of P3HT, focusing on the..... More
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299 |
Improvement in the Hydrogen-Storage Properties of Mg2Ni by Adding LiBH4
Young Jun Kwak, Myoung Youp Song, Ki-Tae Lee
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 2Ni, LiBH 4 was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg 2Ni-10LiBH 4 was prepared with a composition of 90 wt% Mg 2Ni + 10 wt% LiBH 4. The quantity of released hydrogen (H r) versus temperature T curve for Mg 2Ni10LiBH 4 was obtained by heating at..... More
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306 |
Enhancement of Flexural Strength by Slip Casting Cordierite Ceramics with h-BN Nanoparticles
Chul Oh Park, Jong Hyun Lee, Dong Kyun Lee, Hyun Jun Cho, Sung Hwan Yim, Kyu Hyoung Lee
Korean J. Met. Mater. 2024;62(4):306-311. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.306
Abstract
In this study, we enhanced the flexural strength of cordierite ceramics by incorporating h-BN (hexagonal boron nitride) nanoparticles, facilitated by the slip casting process. Initially, commercial cordierite powder with an average particle size of 10 mm underwent a ball-milling process to reduce the size to 2.5 mm and simultaneously achieve..... More
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312 |
Effects of Post-annealing Condition on Interfacial Reaction and Bonding Strength of Cu/Sn-3.0Ag-0.5Cu/Al Joint for Heat Dissipation Module Application
방열 모듈 적용을 위한 Cu/Sn-3.0Ag-0.5Cu/Al 접합부의 계면 반응 및 접합강도에 미치는 후속 열처리 영향 분석
Dong Ik Jeong, Gahui Kim, Doheon Kim, Minchul Oh, Geon-Hong Kim, Young-Bae Park정동익, 김가희, 김도헌, 오민철, 김건홍, 박영배
Korean J. Met. Mater. 2024;62(4):312-322. Published online 2024 Mar 28 DOI: https://doi.org/10.3365/KJMM.2024.62.4.312
Abstract
The effects of post-annealing times at 150°C on the bonding strength and interfacial characteristics of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Al were systematically evaluated. In the as-bonded sample, Cu 6Sn 5 intermetallic compound (IMC) was formed at the upper Cu/SAC305 interface, while Ag 3Al IMC was formed at the lower SAC305/Al interface, and a black layer of..... More
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323 |
Erratum to: Residual Stress Analysis of Additive Manufactured A356.2 Aluminum Alloys using X-Ray Diffraction Methods
Erratum to: X-선회절을통한적층제조 A356.2 알루미늄합금의잔류응력분석
[Original]
SangCheol Park, InYeong Kim, Young Il Kim, Dae-Kyeom Kim, Soong Ju Oh, Kee-Ahn Lee, Bin Lee박상철, 김인영, 김영일, 김대겸, 오승주, 이기안, 이빈
Korean J. Met. Mater. 2024;62(4):323-324. Published online 2024 Mar 29 DOI: https://doi.org/10.3365/KJMM.2024.62.4.323
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