研究目的
Investigating the use of ultra-short-pulsed laser-based sample preparation for TEM lamellas and APT tips to speed up the process and enable new sample geometries.
研究成果
The ultra-short-pulsed laser-based thin specimen preparation system provides fast, cost-effective, and site-specific preparation of samples for microstructure evaluation. It can prepare specimens for TEM, APT, and micromechanical testing, meeting the exacting requirements of several industries.
研究不足
The heat-affected zone (HAZ) can become larger when basic principles of laser micromachining are not obeyed, and there is still a layer of material, micrometers in extent, which will sustain some structural damage. The structural damage strongly depends on the given material and the laser parameters used.
1：Experimental Design and Method Selection:
The study employs ultra-short-pulsed laser technology for sample preparation, focusing on its advantages over traditional methods.
2：Sample Selection and Data Sources:
Specimens for TEM and APT with starting dimensions of 1–3 mm are used.
3：List of Experimental Equipment and Materials:
The microPREP instrument, a 532 nm laser source with 3 W average power, and an objective lens focusing the laser beam to a small probe (beam diameter ～10 μm).
4：Experimental Procedures and Operational Workflow:
The workflow includes laser milling of trenches/undercut, laser cutting or milling of required structures, laser cutting of support structures, removal of workpiece and gluing to a copper half-ring, and post-processing with an Ar+ ion broad beam or with a focused Ga+ or Xe+ ion beam.
5：Data Analysis Methods:
The effectiveness of the instrument is evaluated by the time taken to prepare samples and the quality of the prepared samples.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
