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.


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    Titel :

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


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Yamakawa, Akira (Autor:in) / Matsunuma, Kenji (Autor:in) / Miyake, Masaya (Autor:in) / Nishioka, Takao (Autor:in) / Yamamoto, Takehisa (Autor:in)

    Kongress:

    International Congress & Exposition ; 1992



    Erscheinungsdatum :

    01.02.1992




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch







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    Microstructure and mechanical evaluations of sintered Si3N4

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