Attempted - to -Phase Conversion of Croconic Acid via Ball Milling
Abstract
High-energy ball milling was used in an attempt to induce a high-pressure phase change in croconic acid (CA), which is being investigated as a potential novel energetic material. High-speed video of the milling process was analyzed to determine the peak pressures and impact durations experienced by the CA powder during milling. Differential scanning calorimetry was used to determine what effect varying the ball-to-sample mass ratio and milling time had on the energy content of the milled material. Results indicate the pressure achievable with currently available milling equipment is not sufficient to induce the desired alpha- to beta -phase change, and extended milling times may degrade the material.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 18, 2017
- Accession Number
- AD1034204
Entities
People
- Jennifer A Ciezak-Jenkins
- Rose A. Pesce-rodriguez
- Steven W. Dean
Organizations
- United States Army Research Laboratory