Time-resolved measurements of the shock-compression response of Mo+2Si elemental powder mixtures

Autor:	Naresh N. Thadhani, Kevin S. Vandersall
Rok vydání:	2003
Předmět:	Materials science Silicon Difluoride Metallurgy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Compression (physics) Chemical reaction Shock (mechanics) Stress (mechanics) Compressive strength chemistry Rise time
Zdroj:	Journal of Applied Physics. 94:1575-1583
ISSN:	1089-7550 0021-8979
Popis:	The shock-compression response of Mo+2Si elemental powder mixtures was investigated using instrumented experiments in the velocity range of 500 m/s to 1 km/s. The experiments employed polyvinyl difluoride stress gauges placed at the front and rear surfaces of the powder mixtures to determine the crush strength, densification history, and shock-induced reaction initiation characteristics. Experiments performed on ∼58% dense Mo+2Si powder mixtures at input stresses less than 4 GPa showed characteristics of powder densification and dispersed propagated wave stress profiles with rise time >∼40 ns. At input stress between 4 and 6 GPa, the powder mixtures showed a shock-compression response following the Hugoniot of the solid-density mixture. In the stress regime of 6–7 GPa, shock-induced melting of silicon was observed, which appears to inhibit a shock-induced chemical reaction on the time scale of the time-resolved measurements. The results of the present work on Mo-Si, taken in conjunction with prior work on...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f294a2cebcf8c6d91baae4e0ac23d6f https://doi.org/10.1063/1.1586968 Zobrazit plný text záznamu