Abstract
“Hot spots,” or regions of localized high temperature and pressure that arise during the shock compression of heterogeneous materials, are known to highly influence the initiation characteristics of explosives. By introducing controlled‐size particles at known number densities into otherwise homogeneous explosives, details about hot spot criticality can be mapped for a given material. Here, we describe a series of gas gun‐driven plate impact experiments on nitromethane loaded with 40 μm silica beads at 6 wt%. Through the use of embedded electromagnetic gauges, we have gained insight into the initiation mechanisms as a function of the input shock pressure, and present a Pop‐plot for the mixture, which is further compared to neat nitromethane.
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