Turbocharger rotor

Automotive Valve plate in common rail systems Glow plugs for diesel engines and additional car heating Fuel injector parts, valves, valve train components, rocker arm pads, tappet disks, cam follower roller, turbocharger rotors tappet shim precombustion chambers... 

Applications. Silicon nitride is die leading material for components in advanced automotive, diesel, and gas turbine engines. The range of potentially useful ceramic parts includes both static structural components and dynamic ones such as turbocharger rotors, gasifier turbine rotors, valves, valve guides, valve seats, piston components, cam followers, fuel injector links, and bearings. Some of these parts have been commercialized, others are... 

Besides aerospace applications, interest is focused on automotive engine applications, e.g. valves and turbocharger rotors, which may be nearer to realization (Kim and Dimiduk, 1991). A successful development has led to a cast TiAl turbocharger rotor of about 4 cm diameter which compares favorably with both a superalloy Inconel 713C rotor and a ceramic SiN rotor with respect to performance under service conditions, and which is ready for use in high-performance passenger cars (Nishi-yama et al., 1990). 

K. A. Schwetz, W. Girellner, K. Hunold, A. Lipp, and M. Langer, HIP-treated sintered SiC turbocharger rotors, in Proc. 2nd Intern. Symposium Ceramic Materials and Components for Engines, W. Bunk, H. Hausner (Eds), DKG Verlag, 1986, pp. 1051-1062. 

Akimune, Y, Katano, Y, and Matoba, K, 1989, Spherical-Impact Damage and Strength Degradation in Silicon Nitrides for Automobile Turbocharger Rotors, J. Am. Ceram. Soc., 72[8],pp. 1422-1428. 

Sintered silicon nitride has very good wear resistance, low friction, high elastic modulus, and low density, all properties that have enabled it to be used in various wear parts and engine components including high-temperature, unlubricated roller and ball bearings shown in Fig. 1 and as turbocharger rotors as shown in Fig. 2. 

During the current reporting period, we obtained data on two of the new Si3N4 Injection-molded phantoms (turbocharger rotors) received last period, using two different 3-D algorithms for the microfocus X-ray scanner. 

Fig, 1. Drawing of injection molded Si3N4 turbocharger rotors used in the study... 

Fig. 3. Axial tomographic cross-section of Si3N4 injection-molded turbocharger rotor...

Figure 16.1 Silicon-nitride turbocharger rotor, photograph courtesy of ESK Engineered Ceramics.)...

M. Ito, N. Ishida, and N. Kato. Development of Brazing Technology for Ceramic Turbocharger Rotors. In Proceedings. Automotive Ceramics— Recent Developments, International Congress and Exposition, Detroit,... 

Figure 17.27 Cross-sectional view ofthe combustion section of an internai combustion engine. The shaded parts are manufactured from silicon nitride (piston head, valve seats, turbocharger rotor), alumina (cylinder liner), or aluminum titanate (exhaust pipe lining).

Rottenholber, P., Langer, M., Storm, R.S. and Frechette, F., Design Fabrication and Testing of an Experimental Alpha Silicon Carbide Turbocharger Rotor. Society of Automotive Engineers USA Publication No. 810523 (1981). 

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