Novel Oxidation-Resistant Silicon Carbide Ceramics
SPARK PLUGS AND IGNITORS
Functional Materials Manufacturing (FMM) Inc. has developed two new classes of silicon carbide (SiC) ceramics with properties not found in existing, commercially available SiC.
One class, called “PERLA,” has semiconductor properties and the ability to produce sustainable sparking under applied voltage for extended periods of time, both in reducing and oxidation (air) environments. The novelty of this class of SiC is its ability to maintain sparking at temperatures exceeding 900°C for over 20 hours, without oxidation, erosion, and change in electrical conductivity. This material finds application in aviation spark plugs, where the life of the spark plug is extended an order of magnitude compared to existing counterparts. In addition, the high thermal shock resistant ceramics can initiate ignition instantly without heating the surface of the component. Another potential application for these ceramic carbides is as spark plugs in hydrogen cars, with higher durability and longer life.
OXIDATION PROTECTIVE PANELS AND COMPONENTS
The other class of SiC ceramics designed and manufactured by FMM, called “SIALOC,” can withstand temperatures up to 1550°C in air without oxidation and formation of oxide film on its surface. In addition, the material has unparalleled thermal shock properties, highly desirable for many applications in aerospace/defense, nuclear, and automotive industries. These applications include heating elements in high temperature kilns and furnaces, protective coating in new MOX fuel nuclear reactors, and space exploration.