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Metallically Electrically Conductive Si-Ti-C-N Ceramics

技術優勢

The improved electrical and mechanical properties of this composite are: Final ceramic composite possesses an excellent electrical conductivity, about 17200 (ohm.m)-1, which is higher than some metals Fracture toughness and hardness moderately improved over pure SiC/Si3N4 composites

技術應用

Commercial applications for this material include: Ruggedized circuitry substrates Electrically conductive components Advanced ceramics for aerospace and defense High temperature severe load conditions Cutting tools and wear components

詳細技術說明

A ceramics composite material with improved electrical and mechanical properties has been produced by researchers at the University of California, Davis during consolidation through an in situ reaction of amorphous polymer precursor-derived silicon carbon-nitride and nano-TiO2. Using novel powder preparation and consolidation techniques, single wall carbon nanotubes (SWCN) and nanopowders of alumina are combined into a composite with remarkable properties. The final composite consists of silicon carbide, silicon nitride, and titanium carbonitride, all with nanocrystalline grain sizes. Images Electrical Conductivity at Room Temperature (S/m)

附加資料

Patent Number: US7128850B2
Application Number: US2003453879A
Inventor: Duan, Ren Guan | Kuntz, Joshua D. | Mukherjee, Amiya K.
Priority Date: 2 Jun 2003
Priority Number: US7128850B2
Application Date: 2 Jun 2003
Publication Date: 31 Oct 2006
IPC Current: C04B0035596 | B28B000300 | C04B003552 | C04B003556 | C04B003558 | C04B003564 | C04B0035645 | H01B000100 | H01B000104 | H01B000106 | H01B000118 | H05B000310
US Class: 2525181 | 2525191 | 252500 | 5010974 | 501087 | 501091 | 501092 | 264625 | 264626 | 264682 | 264683
Assignee Applicant: The Regents of the University of California
Title: Electrically conductive Si-Ti-C-N ceramics
Usefulness: Electrically conductive Si-Ti-C-N ceramics
Summary: Used in high-performance application, e.g. heat engines, cutting tools, wear and friction surfaces, or space vehicles.
Novelty: Preparation of conductive composite of, e.g. silicon, for, e.g. heat engines, by consolidating powder mixture of crystalline titanium dioxide, and amorphous silicon carbonitride into continuous mass