Analysis of Mixed State of AP/HTPB Composite Propellant by X-ray Computed Tomography

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<p>AP/HTPB composite propellant is the most typical solid propellant that currently used. In order to obtain excellent combustion characteristics and reliability as a solid rocket motor, it is necessary to measure the dispersion state of AP particles and voids in solid propellant. In this study, we propose the measurement method of the mixed degree that represents the dispersion state of AP particles and voids in by using X-ray CT imaging. The mixed state of the AP/HTPB composite propellant is quantified by analyzing the brightness histogram obtained from the CT image. In the brightness histogram, mixed degree shows the difference between the ideal and measured propellant compositions in the image. Solid propellants with different mixing time were scanned by X-ray CT apparatus. The characteristics of the solid propellant at each mixing time were visualized. The mixing degree decreased as the mixing time longer.</p>

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