Functionally gradient material of the system Ni-MgO, Ni-NiO, Ni-Si3N4 or Al-AlN, by pressureless sintering
Generally speaking, the preparation of FGM-blocks, especially in the metal-nitride systems, by the method of powder metallurgy needs an extremely high temperature and high pressure. But, in this work using a ductile nickel metal powder or an ultrafine particle, the FGM-blocks were easily prepared using a powder metallurgy at a lower temperature. A mixture of a metallic powder and a non-metallic powder whose contents were gradually changed was pressed in a steel die under pressure of 20-32 MPa. These green compacts were heated at 900-1573 K in controlled atmosphere under null pressure. The FGM-blocks prepared by this method were characterized by their properties and were used in joinings. The joinings of metal/FGM/ceramics, metal/FGM and ceramics/FGM were completely accomplished at 900-1573 K. 6 refs.
- OSTI ID:
- 7292845
- Report Number(s):
- CONF-920144-; CODEN: CESPD
- Journal Information:
- Ceramic Engineering and Science Proceedings; (United States), Vol. 13:7-8; Conference: 16. annual conference on composites, materials, and structures, Cocoa Beach, FL (United States), 13-16 Jan 1992; ISSN 0196-6219
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM
HOT WORKING
PRESSING
ALUMINIUM NITRIDES
COMPOSITE MATERIALS
FABRICATION
MAGNESIUM OXIDES
NICKEL
NICKEL OXIDES
SILICON NITRIDES
CERMETS
INTERFACES
MIXTURES
POWDER METALLURGY
POWDERS
SINTERING
TEMPERATURE RANGE 1000-4000 K
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
DISPERSIONS
ELEMENTS
MAGNESIUM COMPOUNDS
MATERIALS
MATERIALS WORKING
METALLURGY
METALS
NICKEL COMPOUNDS
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360601* - Other Materials- Preparation & Manufacture