Velocity — Pressure Over Explosive Relationship

Detonation Velocity-Pressure Over Explosive Relationship. In Dunkle s Syllabus (Ref 4), the effects of temp pressure on the initiation of expln and on its progress are discussed. For example, when hydrocarbon mixts are subjected to high temps pressures, non-flammable gas mixts become expl, mild reactions become violent, and stable gas mixts become spontaneously reactive High temp pressure may facilitate initiation of detonation in a material which ordinarily decomposes quietly  

The influence of pressure on the decompn rate of various expls was reported by Ryabinin (Ref 3). His data showed that high pressure increases the rate of decomp of Lead Styphnate thruout it accelerates the initial stage but decelerates the final stage in the case of 

Mercury Fulminate. Ryabinin suggests that these cases, which appear to be exceptions, may be due to greater ease of developing high temp in expl on initiation at high pressure, and to higher thermal conductivity 

Muraour Basset (Ref 1) made the observation that expls such as NH HI  

Silver Gold Fulminates, and AuNHCl, under pressures of 5000 kg/cm2, can be initiated by an igniting wire to complete decompn. Secondary expls were found to undergo combustion w/o mechanical effect even at 10,000 kg/cm2 

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Detonation Velocity, Influence of External Pressure on. See Detonation Velocity -Pressure Over Explosive Relationship... 

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