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Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

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Microparticle Impact Testing at High Precision, Higher Temperatures, and with Lithographically Patterned Projectiles.

Alain Reiser¹, Christopher A Schuh¹

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

|December 14, 2022

Summary

This summary is machine-generated.

Researchers improved high-velocity microparticle impact experiments by redesigning the laser ablation launch pad. A new glass launch layer enhances precision, enables higher temperatures, and allows for microfabricated impactors.

Keywords:

high-velocity impact laser-induced particle impact testing launch pads metals microscale testing

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Area of Science:

Materials Science
Physics
Engineering

Background:

High-velocity microparticle impact research has seen limited experimental setup modifications.
Future research requires advanced methods to assess more impact variables and study diverse materials.

Purpose of the Study:

To explore novel launch pad designs for laser ablation microparticle impact.
To address experimental challenges limiting the technique's future potential.

Main Methods:

Investigated design modifications for the microparticle launch pad.
Replaced the standard elastomeric polymer layer with a stiff glass layer.

Main Results:

Achieved a reduced launch pad-to-target gap (tens of micrometers), improving targeting reproducibility to ±1.75 µm for 7.38 µm SiO2 particles.
Enabled higher experimental temperatures due to the inert glass surface.
Demonstrated facile microfabrication of advanced impactors using microfabrication-standard materials (e.g., thin-film Au disks).

Conclusions:

The stiff glass launch layer significantly enhances precision and expands experimental capabilities in microparticle impact studies.
This advancement facilitates the study of new materials and phenomena at higher temperatures.
The design enables the creation of sophisticated, microfabricated impactors for future research.