X-ray diffraction studies of shock-modified inorganic materials

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5425314

Morosin, B; Graham, R A

Detailed analysis of broadened x-ray diffraction peak profiles has yielded information on the resulting residual lattice strain and reduced coherent crystallite size on a range of materials subjected to high pressure shock loading. Strain and size values are dependent on various procedures and models used for analysis of such peak profiles; however, trends on such strain and size data as a function of shock-loading pressure and shock temperature depend very strongly on the material. For example, shock-modified rutile shows annealing behavior at modest shock compression (20-27 GPa) due to shock temperature. Alumina and aluminum nitride appear to saturate to high strain values at the same conditions. Titanium diboride appears to show a pressure threshold in excess of 10 GPa before any plastic deformation occurs. The unusually large plastic deformation achieved in brittle inorganic powders indicates the unique nature of shock deformation; such deformations are not typically achieved by using other techniques. Such defective materials exhibit increased chemical activity and present the potential for synthesis of new substances as well as an opportunity to influence materials technology.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5425314
• Report Number(s): SAND-85-0405C; CONF-850889-4; ON: DE85015150
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPRESSION
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
RESIDUAL STRESSES
SHOCK WAVES
STRESSES
TITANIUM BORIDES
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS