Hot forging to produce pore-free near-net-shape ceramic composites

Technical Report · Mon Aug 01 00:00:00 EDT 1988

OSTI ID:5411112

Shulman, H S; Withers, J C; Loutfy, R O

Researchers have demonstrated that it is possible to hot forge ceramic composites without damaging the whisker reinforcement and to reduce flaw size and population. Hot forging was investigated for the systems A1203, A1203/ZrO2, mullite, AlN, and SiC with reinforcements of SiCw and TiB2. The system Al203/SiCw was demonstrated to be forgeable at 1400 C which is 500 C lower than hot pressing temperatures. At high strain rates of greater than 0.1/sec, the density achieved was 99.7 percent with strength values comparable to hot pressing. The hot forging of ceramic-whisker composites offers the opportunity to produce low cost components and, because the process reduces the size and population of flaws, it can result in better mechanical properties with greater reliability.

• Research Organization: Materials and Electrochemical Research Corp., Tucson, AZ (United States)
• OSTI ID: 5411112
• Report Number(s): PB-91-199679/XAB; CNN: NSF-ISI8760230
• Resource Relation: Other Information: Sponsored by National Science Foundation, Washington, DC. Div. of Industrial Science and Technological Innovation
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM NITRIDES
FORGING
ALUMINIUM OXIDES
MULLITE
SILICON CARBIDES
TITANIUM BORIDES
ZIRCONIUM OXIDES
COMPACTING
COMPOSITE MATERIALS
DEFECTS
HOT PRESSING
POROSITY
REINFORCED MATERIALS
RESEARCH PROGRAMS
WHISKERS
ALUMINIUM COMPOUNDS
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CRYSTALS
FABRICATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MATERIALS WORKING
MINERALS
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
PRESSING
SILICON COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360601* - Other Materials- Preparation & Manufacture