Ceramic Piston Crown for Truck Run in Desert

The silicon nitride ceramic piston crown is a critical component for the cooling-free dieselengine. The piston crown material used is GPS-RBSN with rare-earth oxide additives, sintered inthe range of 1800-1960℃, under nitrogen pressure of 0.1~6 MPa, and its bend strength being750 MPa, KIC 7.2 MPa.m1/2, weibull Modulus 12.3. Piston crowns made from this material wereassembled in 6105 cooling-free diesel engines, the diesel engine constructed was rig-tested for morethan 700 hours. The engine was installed in an EQ2060 truck and road-tested for more than1900km in desert and no trouble found.