Densification kinetics of shock-activated nitrides

Conference · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6237856

Beauchamp, E K; Loehman, R E; Graham, R A; Morosin, B; Venturini, E L

Explosive shock treatment of AlN and Si/sub 3/N/sub 4/ increases point defect concentrations by more than an order of magnitude and dislocation densities to 10/sup 15/-10/sup 16//m/sup 2/. Large increases in hot press densification rates for shocked AlN can be attributed to the dislocations. Similarly, the rate of the ..cap alpha..-..beta.. crystallography transition in Si/sub 3/N/sub 4/-MgO mixtures is significantly enhanced by shock-induced dislocations and defects. 5 figures.

• OSTI ID: 6237856
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
COMPACTING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DENSITY
DISLOCATIONS
EXPLOSIVE FORMING
FABRICATION
HOT PRESSING
LINE DEFECTS
MATERIALS WORKING
NITRIDES
NITROGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PNICTIDES
POINT DEFECTS
PRESSING
SILICON COMPOUNDS
SILICON NITRIDES