公开(公告)号：US20190168337A1

公开(公告)日：2019-06-06

申请号：US16324108

申请日：2017-08-04

Applicant: OSAKA UNIVERSITY ,  TOSHIBA MATERIALS CO., LTD.

Inventor： Hidetoshi FUJII ,  Yoshiaki MORISADA ,  Kai FUNAKI ,  Isao IKEDA ,  Yutaka ABE ,  Masahiro KATO

IPC: B23K20/12 ,  C04B35/587 ,  C04B35/63 ,  C04B35/626 ,  C04B35/645

Abstract: The friction stir welding tool member according to the present invention is made of a silicon nitride sintered body, wherein the silicon nitride sintered body contains 15% by mass or less of additive components except silicon nitride in such a manner that the additive components include at least one element selected from lanthanoid elements and at least one element selected from Mg, Ti, Hf, and Mo. In addition, it is preferable that the additive components further include at least one element selected from Al, Si, and C. According to the above-described configuration, a friction stir welding tool member having an excellent durability can be provided.