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The Development of Second Generation Ceramic Turbocharger Rotor - Further Improvements in Reliability
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Abstract
Nissan has developed a second generation ceramic turbocharger rotor which provides greater reliability and higher performance than a conventional ceramic rotor. The new rotor is made of silicon nitride, which has demonstrated sufficient strength in vehicle applications. The bonding technique for joining the ceramic rotor to the metal shaft has been confirmed through experimentation to have sufficient reliability. The second generation rotor is featured by the low stress design and higher dynamic strength, and two factors contribute to its higher reliability. The rotor shape was optimized on the basis of results obtained in two analyses of particle impact resistance and applied combined stress. Test results show that the reliability of the second generation rotor have been substantially improved over those of the conventional rotor now being used on production vehicles.
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Matoba, K., Katayama, K., Kawamura, M., and Mizuno, T., "The Development of Second Generation Ceramic Turbocharger Rotor - Further Improvements in Reliability," SAE Technical Paper 880702, 1988, https://doi.org/10.4271/880702.Also In
References
- Katayama Kaoru et al. “Development of Nissan High Response Ceramic Turbocharger Rotor,” SAE Paper 861128 1986
- Hattori Yoshinori et al. “Gas Pressure Sintered Silicon Nitride Ceramics for Turbo-charger Application,” Proc.2nd.Int.Symp.” Ceramic Material and Components For Engine” Bunk W. Hausner H. 165 1986
- Okada Akira et al. “Crack Growth and Crack Tip Blunting of SSN at High Temperature,” Yogyo-Kyokai-shi 93 8 426 1985
- Matsunaga Masaji et al. “A Study of Joining Interface between Si 3 N 4 and Metal by Active Metal,” Extended Abstracts of 98th Spring Meeting of the Japan Institute of Metals 142 1986
- Akimune Yoshio et al. “Spherical Particle Damage in Silicon Nitride and Its Microstructure,” Extended Abstract of 7th High Temperature Material Meeting of the Japan Ceramic Society