The high reliability silicon nitride sintered body and the mirror finish grinding machining technique have been developed, which improved fuel efficiency by reducing weight and friction loss of the valve systems. This ceramics, consists of finer grains (mean grain size:1-3μm) has high strength (σ 3b=1600MPa) and high Weibull modulus (m>20).In the case of motoring test by using this ceramics as the cam follower of the valve systems, it has a durability of more than 10,000rpm., which is approx. 30% higher than that of conventional silicone nitride, against the impact load to which the cam followers were subjected at occurrence of valve bouncing.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development of High Strength Si3N4 Sintered Body for the Valve Systems of Automotive Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1992



    Publication date :

    1992-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    Devitrification effects of grain boundary phases on high-temperature strength of sintered Si3N4 materials

    Braue,W. / Woetting,G. / Ziegler,G. et al. | Automotive engineering | 1986


    Microstructure and mechanical evaluations of sintered Si3N4

    Russell, L. / Sankar, J. / Wei, Q. et al. | AIAA | 2000


    Microstructure and Mechanical Evaluations of Sintered Si3N4

    Kelkar, A. / Russell, L. / Sankar, J. et al. | British Library Conference Proceedings | 2000