A New Femtosecond Laser‐Based Tomography Technique for Multiphase Materials

Echlin, McLean P.; Husseini, Naji S.; Nees, J.; Pollock, Tresa M.

doi:10.1002/adma.201003600

Cited by 34 publications

(19 citation statements)

References 30 publications

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“…A similar laser has previously been employed for development of a optical tomography approach described as the femtsecond laser-based tomography technique (FSLTT) technique. 12 The CPA-2110 has an average power of 1.2 W, 1 kHz repetition rate, 780 nm wavelength, and uses a Ti-sapphire crystal as the primary gain medium. Our recent experiments have demonstrated that femtosecond lasers can ablate material with low amounts of collateral damage 22 and a negligible heat affected zone.…”

Section: B Femtosecond Lasermentioning

confidence: 99%

“…We have recently demonstrated that femtosecond lasers can serve as a powerful tool for rapid acquisition of 3D data using optical imaging in an ambient laboratory air environment. 12 The femtosecond laser has proved to be a unique tool for the μm-scale modification of materials due to its low peripheral damage and impressive material removal rates. [13][14][15] However, the limitations of optical imaging constrain the range of material features that can be examined via femtosecond laser serial sectioning in ambient air.…”

Section: Introductionmentioning

confidence: 99%

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A new TriBeam system for three-dimensional multimodal materials analysis

Echlin

Mottura

Torbet

et al. 2012

Review of Scientific Instruments

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132

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The unique capabilities of ultrashort pulse femtosecond lasers have been integrated with a focused ion beam (FIB) platform to create a new system for rapid 3D materials analysis. The femtosecond laser allows for in situ layer-by-layer material ablation with high material removal rates. The high pulse frequency (1 kHz) of ultrashort (150 fs) laser pulses can induce material ablation with virtually no thermal damage to the surrounding area, permitting high resolution imaging, as well as crystallographic and elemental analysis, without intermediate surface preparation or removal of the sample from the chamber. The TriBeam system combines the high resolution and broad detector capabilities of the DualBeam(TM) microscope with the high material removal rates of the femtosecond laser, allowing 3D datasets to be acquired at rates 4-6 orders of magnitude faster than 3D FIB datasets. Design features that permit coupling of laser and electron optics systems and positioning of a stage in the multiple analysis positions are discussed. Initial in situ multilayer data are presented.

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Section: B Femtosecond Lasermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new TriBeam system for three-dimensional multimodal materials analysis

Echlin

Mottura

Torbet

et al. 2012

Review of Scientific Instruments

Self Cite

132

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“…The removal of the material for serial sectioning can be performed with different methods: e.g. by mechanical polishing, electropolishing, focused ion beam (FIB) removal and femtosecond laser ablation (Echlin et al, 2011). Regardless of the method employed for the preparation of the sections, the serial sectioning technique suffers from the misalignment between consecutive sections, which needs to be accurately corrected before further data processing (Uchic, 2011).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional characterization of grain boundaries in pure nickel by serial sectioningviamechanical polishing

et al. 2015

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Five macroscopic boundary parameters can be extracted from three-dimensional orientation maps. Serial sectioning, which includes consecutive steps of material removal, and electron backscatter diffraction (EBSD) measurement were employed to extract a stack of two-dimensional sections of a pure nickel sample. The EBSD patterns were collected from large millimetre scale areas and mechanical polishing was applied to prepare the sections. The three-dimensional microstructure was then reconstructed from these sections. A new alignment algorithm based on the minimization of misorientation between two adjacent sections has been developed to accurately align the sections. Differently from the conventional alignment methods, the new algorithm corrects not only the translational misalignment but also rotational and plane parallelity misalignments. The aligned three-dimensional microstructure exhibits smooth grain boundary planes and continuous orientation gradients inside the grains as experimental scatter induced by misalignment was largely removed. Grain boundaries were reconstructed from the aligned three-dimensional map, and the distribution of boundaries in the domain of five macroscopic boundary parameters was computed using kernel density estimation. Methods for estimating the reliability of the distributions are demonstrated. This distribution is compared with the distributions obtained previously for other face-centered cubic materials, including a different pure nickel sample.

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“…[29]) or laser ablation (e.g. [30]). One of the advantages with FIB and laser ablation is a relatively high resolution (down to a few nanometres at the best) for each milling layer, thanks to the high precision of the beam.…”

Section: D (X Y Z) Static Characterizationsmentioning

confidence: 99%