公开(公告)号：US20210189530A1

公开(公告)日：2021-06-24

申请号：US17038151

申请日：2020-09-30

Applicant: University of Science and Technology Beijing

Inventor： Xianran XING ,  Kun LIN ,  Chengyi YU

IPC: C22C38/00 ,  C22C33/04 ,  C21D6/00 ,  C21D1/773 ,  C21D1/26

Abstract: A plastic single-axis zero-expansion composite material and a preparation method thereof are provided, featuring incorporating an α-Fe second phase into a matrix of R2Fe17-type intermetallic compound, in which R refers to a rare earth element with a low atomic content of 4%. The material has simple synthesis steps and can be easily implemented, and the phase interface formed by the eutectic reaction is more stable than the composite structures obtained by the traditional solid-phase sintering, thereby realizing the regulation of the thermal expansion, and significantly improving the mechanical properties.