Combustion synthesis of Si/sub 3/N/sub 4/ and AlN
Conference
·
OSTI ID:6399611
Si/sub 3/N/sub 4/ and AlN have been synthesized by combustion of the respective metal powders in high pressure nitrogen gas. The Si/sub 3/N/sub 4/ product consists of a powder containing both the ..cap alpha..- and ..beta..- forms. While operating in the pressure range of 100 to 1000 atmospheres, the highest yield for Si/sub 3/N/sub 4/ was 95%. An important parameter in producing a high yield is the silicon particle size. A silicon powder with an average particle size of 3 ..mu..m was used in most of the experiments. The optimum experimental conditions are described for the synthesis of Si/sub 3/N/sub 4/. The AlN formed by the combustion of aluminum powders was in the forms of a dense (approx.92%) part. The experimental parameters control whether the combustion reaction goes to completion and the structure of the product. The preliminary results are favorable for the development of a process to produce dense AlN components using the combustion of aluminum powder in nitrogen gas. 14 refs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6399611
- Report Number(s):
- UCRL-93468; CONF-8510280-3; ON: DE86006530
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:6073999
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·
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Conference
·
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·
OSTI ID:5549392
Related Subjects
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CHEMICAL REACTIONS
COMBUSTION
CRYSTAL STRUCTURE
DATA
DENSITY
EXPERIMENTAL DATA
FABRICATION
INFORMATION
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDATION
PHYSICAL PROPERTIES
PNICTIDES
POROSITY
SILICON COMPOUNDS
SILICON NITRIDES
SINTERING
SYNTHESIS
THERMOCHEMICAL PROCESSES
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CHEMICAL REACTIONS
COMBUSTION
CRYSTAL STRUCTURE
DATA
DENSITY
EXPERIMENTAL DATA
FABRICATION
INFORMATION
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDATION
PHYSICAL PROPERTIES
PNICTIDES
POROSITY
SILICON COMPOUNDS
SILICON NITRIDES
SINTERING
SYNTHESIS
THERMOCHEMICAL PROCESSES