Shock compression of quartz and aluminum powder mixtures

Technical Report · Wed Nov 01 04:00:00 EST 1995

DOI:https://doi.org/10.2172/125005· OSTI ID:125005

Joshi, V S ^[1]; Thadhani, N N ^[2]; Graham, R A; Holman, Jr, G T ^[3]

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1. New Mexico Tech, Socorro, NM (United States). Energetic Materials Research and Testing Center
2. Georgia Inst. of Tech., Atlanta, GA (United States). School of Materials Science and Engineering
3. Sandia National Labs., Albuquerque, NM (United States). Advanced Materials Physics and Devices

The authors report about the shock-compression response of highly porous (55% and 65% dense) mixtures of 4Al + 3SiO{sub 2} powders having shock-induced phase transitions and chemical reactions. Shock recovery experiments were performed using the CETR/Sawaoka plate-impact system (P = 40 to 100 GPa) and the Sandia Momma Bear A Comp B fixture (P = 22 to 45 GPa). The recovered compacts contained the high pressure stishovite phase, products of chemical reaction, as well as unreacted constituents. The reaction products formed included Al{sub 2}O{sub 3} metallic Si (ambient and high pressure phases), SiAl intermetallic, and kyanite (Al{sub 2}SiO{sub 5}). The shock-induced chemical reaction in 4Al + 3SiO{sub 2} powder mixtures, appears to have been accompanied (or assisted) by the formation of stishovite, a high pressure phase of quartz.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 125005
• Report Number(s): SAND--95-2357C; CONF-950846--65; ON: DE96002078; CNN: NSF Contract DMR-936132
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ALUMINIUM
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
ALUMINIUM SILICATES
DETONATIONS
EXPERIMENTAL DATA
EXPLOSIVE FORMING
INTERMETALLIC COMPOUNDS
OPTICAL MICROSCOPY
PHASE STUDIES
PHASE TRANSFORMATIONS
POWDER METALLURGY
QUARTZ
SCANNING ELECTRON MICROSCOPY
SILICON
SILICON ALLOYS
X-RAY DIFFRACTION