Uniform periodic microstructure formation over large areas is generally challenging in Direct Laser Interference Patterning (DLIP) due to the Gaussian laser beam intensity distribution inherent to most commercial laser sources. In this work, a diffractive fundamental beam-mode shaper (FBS) element is implemented in a four-beam DLIP optical setup to generate a square-shaped top-hat intensity distribution in the interference volume. The interference patterns produced by a standard configuration and the developed setup are measured and compared. In particular, the impact of both laser intensity distributions on process throughput as well as fill-factor is investigated by measuring the resulting microstructure height with height error over the structured surface. It is demonstrated that by utilizing top-hat-shaped interference patterns, it is possible to produce on average 44.8% deeper structures with up to 60% higher homogeneity at the same throughput. Moreover, the presented approach allows the production of microstructures with comparable height and homogeneity compared to the Gaussian intensity distribution with increased throughput of 53%.
PDF) Local composition detouring for defect-free compositionally graded materials in additive manufacturing
Materials, Free Full-Text, Carbon Felt
Materials, Free Full-Text, gold digging ants
Materials, Free Full-Text, Carbon Felt
Reynolds Advanced Materials, Don't miss the Reynolds-Phoenix basics of mold-making seminar on February 2nd! Learn about mold-making and casting materials, techniques
Materials, Free Full-Text, morenting auto spray
1045 Steel Properties In Publish Article Sale
Materials, Free Full-Text
SOLUTION: Free study materials google drive link collection pdf thumb - Studypool