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Characteristics of shock-compressed configuration of Ti and Si powder mixtures

Conference ·
OSTI ID:10183615
 [1];  [2];  [3]
  1. Georgia Inst. of Tech., Atlanta, GA (United States). School of Materials Science and Engineering
  2. New Mexico Inst. of Mining and Technology, Socorro, NM (United States)
  3. Sandia National Labs., Albuquerque, NM (United States)
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Shock-compression recovery experiments were performed on mixtures of Ti and Si powders of fine, medium, and coarse morphology, and packed at different initial densities, using the Sandia Momma and Poppa Bear fixtures with Baratol explosive. The shock-compressed configuration revealed characteristics typical of either chemically reacted material with fine equiaxed grains, or unreacted material with densely packed Ti and Si particles. The unreacted configuration showed that Ti particles were extensively deformed, irrespective of powder morphology and shock conditions generated by either fixture. In contrast Si particles showed different characteristics depending on the powder morphology, packing density, and shock conditions. The microstructural characteristics of unreacted configuration of Ti and Si powder mixtures were investigated. Mechanistic processes occurring prior to the inception of shock-induced chemical reactions in this system are described.

Research Organization:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
DOE Contract Number:
AC04-76DP00789
OSTI ID:
10183615
Report Number(s):
SAND--93-0510C; CONF-930676--36; ON: DE93018857; CNN: Contract DAAH04-93-G-0062
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360201
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTIONS
COMPRESSION
EXPLOSIONS
MICROSTRUCTURE
MIXTURES
PARTICLES
POWDERS
PREPARATION AND FABRICATION
SHOCK WAVES
SILICON
SYNTHESIS
TITANIUM
TITANIUM SILICIDES