Explosive consolidation of aluminum nitride ceramic powder: a case history
Technical Report
·
OSTI ID:6617801
A case study of the explosive consolidation of A1N is presented. Measured and calculated stress histories show a two-wave structure during the initial compaction, consisting of an ingoing pulse and an outgoing pulse reflected from the cylinder axis. The macrostructural features of the consolidated specimen are rationalized and discussed in terms of this observed stress history. It is suggested that the second shock determines, at least in part, the final density of the compact. Examination of eat treated specimens in the transmission electron microscope (TEM) shows that recovery of the heavily dislocated microscope (TEM) shows that recovery of the heavily dislocated microstructure is rapid at 1500/sup 0/C, and, further, that the amorphous intergranular phase disappears. A dispersion of fine precipitates appears at grain boundaries during heat treatment as well. The fracture toughness of explosively consolidated specimens, 3.0 MPa m/sup 1/2/, is the same as that of hot-pressed material, indicating that explosive consilidation is a viable means of producing dense, well bonded A1N. 7 figures, 1 table.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6617801
- Report Number(s):
- UCRL-88181; CONF-821133-2; ON: DE83003876
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructure of explosively compacted aluminum nitride ceramic
Computer simulations of the explosive consolidation of powders
Explosive consolidation of aluminum nitride powder
Conference
·
Fri May 01 00:00:00 EDT 1981
·
OSTI ID:6325762
Computer simulations of the explosive consolidation of powders
Conference
·
Wed Jul 01 00:00:00 EDT 1987
·
OSTI ID:6183553
Explosive consolidation of aluminum nitride powder
Conference
·
Sat Jun 01 00:00:00 EDT 1985
·
OSTI ID:5054546
Related Subjects
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CERAMICS
COMPACTING
CRYSTAL STRUCTURE
DATA
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
EXPLOSIVE FORMING
FABRICATION
FRACTURE PROPERTIES
GRAIN BOUNDARIES
GRAIN SIZE
HEAT TREATMENTS
INFORMATION
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
POWDERS
SHOCK WAVES
SIZE
TRANSMISSION ELECTRON MICROSCOPY
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CERAMICS
COMPACTING
CRYSTAL STRUCTURE
DATA
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
EXPLOSIVE FORMING
FABRICATION
FRACTURE PROPERTIES
GRAIN BOUNDARIES
GRAIN SIZE
HEAT TREATMENTS
INFORMATION
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
POWDERS
SHOCK WAVES
SIZE
TRANSMISSION ELECTRON MICROSCOPY