公开(公告)号：US20180159304A1

公开(公告)日：2018-06-07

申请号：US15828927

申请日：2017-12-01

Applicant: DENSO CORPORATION

Inventor： Masayuki TAMURA ,  Yuji KAJI ,  Yoshinori DOI ,  Shinya TANAKA ,  Atsushi YOSHIDA

IPC: H01T13/32 ,  H01T21/02 ,  B32B15/01 ,  H01T13/39

CPC classification number: H01T13/32 ,  B32B15/01 ,  H01T13/39 ,  H01T21/02

Abstract: A pipe material used as a discharge electrode of a spark plug for an internal combustion engine comprises an outer layer made of a Ni-based alloy, an inner layer made of a Pt-based alloy provided inside the outer layer, and an intermediate layer provided between the outer layer and the inner layer.