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Volume 62(4); Apr 2024
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Research Papers
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 Kim
김원석, 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
                
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 Byon
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-Al2O3 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-Al2O3 coatings. The Al-Al2O3 coatings showed..... More

                
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 Lee
방지예, 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

                
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 Ahn
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..... More

                
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

                
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

                
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 Mg2Ni, LiBH4 was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg2Ni-10LiBH4 was prepared with a composition of 90 wt% Mg2Ni + 10 wt% LiBH4. The quantity of released hydrogen (Hr) versus temperature T curve for Mg2Ni10LiBH4 was obtained by heating at..... More

                
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

                
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 Park
정동익, 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, Cu6Sn5 intermetallic compound (IMC) was formed at the upper Cu/SAC305 interface, while Ag3Al IMC was formed at the lower SAC305/Al interface, and a black layer of..... More

                   Web of Science 1  Crossref 1
Erratum
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 Lee
박상철, 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
Abstract
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