https://doi.org/10.3365/KJMM.2026.64.2.83

(Hyeonbin Jou) ; (Jaehwan Kim) ; (Min Ki Park) ; (Yeunseok Ha) ; (Tae-Young Lee) ; (Nam Son Park) ; (Kyoung-Min Kim) ; (Seunghoe Choe)

Precisely controlling topology for target applications is considered crucial for the electrodeposition process, since the microstructural features directly determine the resulting physical and functional properties of the coating. In this study, we propose electrolytic solution activation as an efficient and practical method to suppress irregular growth of CuAg alloys during electrodeposition in an additive-free methanesulfonate-based solution. Comparative experiments revealed that CuAg foils obtained from a non-activated bath exhibit an irregular and rough surface morphology, which in turn results in low strength and poor electrical conductivity.

https://doi.org/10.3365/KJMM.2026.64.2.94

최지원(Ji Won Choi) ; 김지영(Ji Young Kim) ; 김영민(Youngmin Kim) ; 이의선(Eui Seon Lee) ; 오승탁(Sung-Tag Oh)

Camphene and tert-butyl alcohol (TBA) crystals are used as sublimable vehicles in a freeze casting process to fabricate porous W with distinctive pore structures. The WO3 raw powder was subjected to ball milling for 5 h to eliminate large agglomerates and achieve a uniform particle size distribution. The sintered bodies exhibited macroscopic pores that were aligned parallel to the direction of freeze-casting.

https://doi.org/10.3365/KJMM.2026.64.2.100

서세훈(Sehoon Seo) ; 예성욱(Sung Wook Ye) ; 김상일(Sang-il Kim) ; 김수민(Sumin Kim) ; 노종욱(Jong Wook Roh)

Thermoelectric (TE) materials can directly convert heat into electricity and vice versa through the Seebeck and Peltier effects. TE materials provide a solid-state solution for harvesting waste heat from industrial processes, automotive exhausts, and even human bodies. In this study, SnO2 coating on p-type Bi-Sb-Te alloy was performed to suppress the bipolar effect and improve TE performance.

https://doi.org/10.3365/KJMM.2026.64.2.108

강지원(Ji-Won Kang) ; 명신우(Shin-Woo Myeong) ; 박언주(Eon-ju Park) ; 박종혁(Jong-Hyeok Park) ; 김지현(Jihyeon Kim) ; 박민정(Minjeong Park) ; 김양도(Yangdo Kim) ; 김치호(Chiho Kim) ; 최승목(Sung Mook Choi)

Developing high-performance and durable non-noble metal catalysts for the oxygen evolution reaction (OER) is essential to advance anion exchange membrane water electrolysis (AEMWE) technology. In this study, Ni-Co-Fe ternary layered double hydroxide (LDH) catalysts were synthesized via a co-precipitation method, and the metal stoichiometry was systematically optimized to enhance OER activity.

https://doi.org/10.3365/KJMM.2026.64.2.119

(Jin-Wook Kim) ; (A-Young Sung)

To compare how TiO2 synthesis route and loading influence optical, hydration, surface, mechanical, stability of leachables, and antibacterial properties of HEMA-based hydrogel contact lenses and to identify an optimal composition range. TiO2 nanoparticles were prepared by hydrolysis precipitation or a sol-gel route and incorporated into identical hydrogels at 0.03, 0.05, 0.07, and 0.10 wt%.

https://doi.org/10.3365/KJMM.2026.64.2.126

최정원(Jeongwon Choi) ; 김태윤(Taeyoon Kim) ; 이제인(Je In Lee)

Research on the wetting and spreading of liquid alloys on ceramic substrates has significant importance for the brazing and mixing of metal and ceramic materials. In this study, we investigated the variation of contact angles of hypereutectic Al-20, 40Si alloys (atomic %) on an AlN substrate using the sessile drop method with a high-temperature contact angle analyzer.

https://doi.org/10.3365/KJMM.2026.64.2.137

(Jaesung Lee) ; (Yee Yee Win) ; (Bonnie Lee) ; (Jae Eun Yu)

This study presents a comprehensive metallurgical characterization of ancient coins excavated from the Bagan archaeological site in Myanmar, dating from the 1st to 13th centuries. Using multiple analytical methods, including SEM-EDS and metallographic examination, this research clarifies the alloy compositions and manufacturing techniques of coins used in the Pyu and Bagan periods.

https://doi.org/10.3365/KJMM.2026.64.2.147

조태현(Taehyeon Cho) ; 신동원(Dongwon Shin) ; 최윤석(Yoon Suk Choi)

In this study, a methodology to assess the creep life of commercial and virtual heat-resistant steels is proposed by combining the forward machine learning model, which was trained by creep data collected from a literature survey, with AI-generated virtual heat-resistant steel compositions, of which the metallurgical feasibility was verified using thermodynamic calculations.

https://doi.org/10.3365/KJMM.2026.64.2.163

최정후(Jeonghoo Choi) ; 김민욱(Minwook Kim) ; 이석재(Seok-Jae Lee)

In this study, Nb and Ti were added to SCR420H steel to promote grain refinement during high-temperature carburizing. The resulting microstructures and precipitates in base steel without microalloying elements were compared with those in steels containing Nb or Ti. Thermodynamic calculations and GAN-based analysis were performed to analyze the AGG behavior.