The University of Osaka · 공학
T. Matsuda 교수의 연구실은 고강도 금속 및 복합재료 간의 접합 기술, 특히 Friction Stir Spot Welding(FSSW)을 중심으로 한 이종재료 접합의 거시적 기계적 거동과 미세구조적 상호작용을 연구합니다. 나노스케일의 표면 처리, 초단시간 레이저 충격에 의한 나노구조 형성, 그리고 금속-반도체 간의 직접 접합 기술 개발을 통해 재료의 강도 및 내구성을 극대화하는 데 초점을 맞추고 있습니다. 특히, 표면 처리 없이도 안정적인 접합을 가능하게 하는 새로운 접합 메커니즘과 나노결정구조 형성 메커니즘을 규명하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this study, the synergistic effects of a hybrid surface treatment involving hydrochloric acid (HCl) immersion and silanization on friction stir spot welding (FSSW) of aluminum and carbon fiber reinforced thermoplastic (CFRTP) were investigated. Maximum tensile shear strength of 10.2 kN and maximum cross-tension strength of 1.92 kN were achieved. An unloading test and a miniature tensile test revealed that the fracture behavior changed from interfacial to CFRTP fracture due to increased interf
The macroscale mechanical properties of dissimilar joints are generally influenced by the fracture behavior of joint interface. However, little is known about the dominant factor for the joint properties related with both macroscale fracture behavior and microscale interfacial properties. Herein, microscale tensile testing of the joint interface was coupled with the macroscale fracture evaluation to elucidate the dominant factor of strength in dissimilar joints between 6061 aluminum alloy and hi
Silicon-based materials are widely promising electronic components by the combination with metals in power electronics field. However, bonding metal and silicon-based materials generally requires specific surface modification due to their different chemical bonds. Here, we demonstrate a process for directly bonding metals to silicon-based materials that does not require surface treatment, based on the in situ decomposition of Ag<sub>2</sub>O paste, forming Ag nanoparticles (AgNPs). We demonstrat
We found that multiple shots of femtosecond laser-driven shock pulses changed coarse crystalline iron grains with a size of 140 μm into nanocrystals with a high density of dislocations, which had never been observed in conventional shock processes. We performed metallurgical microstructure observations using transmission electron microscopy (TEM) and hardness measurements using nanoindentation on cross-sections of shocked iron. TEM images showed that grains with sizes from 10 nm through 1 μm exi
