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Ceramic Engine Valves
Author(s) -
Wills Roger R.,
Southam Robert E.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb09722.x
Subject(s) - superalloy , component (thermodynamics) , ignition system , materials science , ceramic , spark (programming language) , silicon nitride , nitride , automotive engineering , mechanical engineering , process engineering , metallurgy , silicon , composite material , engineering , computer science , thermodynamics , programming language , microstructure , physics , layer (electronics) , aerospace engineering
Current trends in spark ignition engines are toward multivalve engines capable of operating at relatively high speeds to maximize performance and fuel economy at acceptable emissions levels. Structural ceramics, with their low density and good high‐temperature properties, appear to offer potential as an alternative valve material to the steels, superalloys, and titanium alloys currently in use. Progress to date on materials development, component design, component performance, and engine testing indicates that silicon nitride valves will operate satisfactorily.