Evidence for metallic phases of strong covalent materials in shock compression data

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5418740

Grover, R; Ree, F H

The question of where strongly covalent materials become metallic under the influence of pressure is both of great theoretical and applied interest. The only presently available experimental method for studying the high pressure destruction of strong covalent bonds in condensed materials is the dynamic shock compression technique. In recent years a significant amount of dynamic compression data has been accumulated on covalent materials whose anomalous characteristics have been only partially or not at all understood. Preliminary calculations are summarized which can explain the compression data of a number of important covalent materials in terms of high coordination metallic phases stable at high temperatures and pressures. The materials studied are the group IV solids C, Si, and Ge, liquid N/sub 2/ and CO and various solid and liquid hydrocarbons C/sub m/H/sub n/.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5418740
• Report Number(s): UCRL-86705; CONF-810827-14; ON: DE82012807
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPRESSION
DIAGRAMS
ELEMENTS
GERMANIUM
METALS
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
SEMIMETALS
SILICON