| 摘要 |
PROBLEM TO BE SOLVED: To provide ceramic sliding parts having the excellent durability of joined parts of a ceramic body and a metallic body by the control of the shapes or sizes of the chamfered parts to be formed on the ceramic body and the metallic body. SOLUTION: The ceramic sliding parts are composed as tappets and have the structure obtained by forming the rear surface side of the ceramic body 4 as a joining surface 4b and brazing and joining the same to the end face 2a of the metallic body 2. The front surface side of the ceramic body 4 is formed as a sliding surface 4a. The chamfered parts 4c and 4d are applied on the sliding surface 4a and likewise the respective outer peripheral edges of at least either of the joining surface 4b of the ceramic body and the end face 2a of the metallic body 2. The inner edge of the chamfered part 4c on the sliding surface side of the ceramic body exists on the side inner than at least either of the inner edge B of the chamfered part 4d on the joining surface side of the ceramic body and the inner edge C of the chamfered part 2c on the end face side of the metallic body. When a cam, etc., abut against these parts and the parts slide, the stress concentration to the outer peripheral part of the brazed and joined layer and eventually the plastic deformation, etc., thereof may be reduced and the durability is improved.
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