Marion Herrmann

Nov 6, 2024 | fis.tu-dresden.de | Jian Feng |Marion Herrmann |Antonio Gutierrez |Antonio Gutiérrez

This work addresses the challenges in brazing thermohydraulic sealings involving dissimilar materials, specifically 316Ti stainless steel and alumina, which have significantly different coefficients of thermal expansion (CTEs) and elastic constants. Traditional brazing methods require complex interlayers or extensive metallization steps, leading to issues such as dimensional changes, braze voids, and inadequate corrosion resistance due to prolonged high-temperature exposure.

Aug 12, 2024 | fis.tu-dresden.de | Jian Feng |Marion Herrmann |Antonio Gutierrez |Antonio Gutiérrez

Ceramic-on-ceramic joints are notorious for their inherent brittleness, posing challenges for high-performance applications. To address this, a novel approach is proposed to enhance the involvement of filler metals during fracture. This study investigates the controlled initiation and propagation of cracks in Al2O3–Al2O3 joints through a strategic combination of laser pre-cracking, laser patterning, and laser active brazing techniques.