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Related Experiment Video

Updated: Jun 18, 2025

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Published on: June 9, 2016

Subsurface Spectroscopy of Thermal Degradation Inside an Inert Plastic Bonded Explosive (PBX) Simulant Using

Benjamin R Anderson¹, Natalie Gese¹, Hergen Eilers¹

¹Applied Sciences Laboratory, Institute for Shock Physics, Washington State University, Spokane, Washington, USA.

Applied Spectroscopy

|August 2, 2024

Summary

This summary is machine-generated.

Embedding inert high-explosive analog crystals (EYAD) in a polymer simulant enhances their thermal stability. The polymer restricts melting, allowing fluorescence at higher temperatures compared to bare crystals.

Keywords:

Raman Wavefront shaping disordered materials fluorescence heterogeneous materials scattering

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Published on: February 27, 2013

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Last Updated: Jun 18, 2025

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Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Published on: February 27, 2013

Area of Science:

Materials Science
Spectroscopy
Chemical Engineering

Background:

Understanding the thermal degradation of energetic materials is crucial for safety and performance.
Spectroscopic techniques are vital for characterizing material properties under various conditions.
Heterogeneous materials present challenges for subsurface analysis due to light scattering.

Purpose of the Study:

To investigate the subsurface thermal degradation of an inert high-explosive analog (Eu:Y(acac)3(DPEPO) - EYAD) within a plastic bonded explosive simulant.
To evaluate the impact of embedding EYAD crystals in a heterogeneous polymer matrix on their thermal stability and spectroscopic properties.
To demonstrate the utility of feedback-assisted wavefront shaping for enhanced subsurface spectroscopy in complex materials.

Main Methods:

Utilized feedback-assisted wavefront shaping to focus pump light onto embedded EYAD crystals within a polymer simulant.
Employed fluorescence and Raman spectroscopies to monitor EYAD's thermal degradation.
Compared spectroscopic signatures of embedded EYAD with bare EYAD crystals across a temperature range.

Main Results:

Embedding EYAD in a heterogeneous polymer significantly improved its thermal stability.
EYAD fluorescence persisted to >612 K within the polymer, compared to quenching by 500 K for bare crystals.
Observed improved spectroscopic signatures for embedded EYAD due to enhanced light focusing.

Conclusions:

The polymer matrix enhances the thermal stability of EYAD crystals by restricting melting effects.
Wavefront shaping is an effective technique for probing subsurface thermal degradation in heterogeneous energetic materials.
This research provides insights into stabilizing energetic materials through matrix embedding for improved performance and safety.