Jongun Moon
포항공과대학교 기계공학과 · 공학
Jongun Moon 교수의 연구실은 고엔트로피 합금의 나노구조 제어와 기계적 거동을 중심으로 한 신소재 개발에 집중하고 있습니다. 특히 고압 토크 가공을 통한 미세구조 제어와 비례 변형률 감도, 열적 활성화 거동에 기반한 변형 메커니즘 규명이 핵심 연구 주제입니다. 또한, 유전율 및 소결 특성을 조절하는 페로일렉트릭 및 페로이크티브 산화물 소재의 개발도 진행 중입니다. 이는 고성능 전자소자 및 고온 구조재 응용을 위한 기초 소재 기술을 확보하는 데 기여합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this work, the mechanical characteristics of high-entropy alloy Co<sub>20</sub>Cr<sub>26</sub>Fe<sub>20</sub>Mn<sub>20</sub>Ni<sub>14</sub> with low-stacking fault energy processed by cryogenic and room temperature high-pressure torsion (HPT) were studied. X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses were performed to identify the phase and microstructure variation and the mechanical properties characterized by Vickers hardness mea
Strain-rate dependence in face centered cubic high entropy alloys still remains controversial despite extensive efforts on this topic. Strain-rate sensitivity reflects underlying thermally-activated deformation and the controversy boils down to the deformation mechanism. There has been disagreement even on the experimental values of the strain-rate sensitivity and activation volume. This study reviewed and analyzed the differences in experimental values and proposed mechanisms to resolve the con
The dielectric and sintering properties of (1- x )CaTiO 3 – x LaAlO 3 were investigated. The greater the amount of LaAlO 3 , which has a lower sintering temperature than CaTiO 3 , the higher the relative density is obtained. As x increased in (1- x )CaTiO 3 – x LaAlO 3 , the following phase transformation occurred: orthorhombic ( x ≤0.4) →pseudocubic ( x =0.5) →rhombohedral ( x ≥0.6). The microwave dielectric properties of ε r =37, Q · f 0 =47,000 (at 7 GHz), and τ f =5 ppm/°C were obtained at 0
