Bi-Continuous W-Rich Refractory High Entropy Alloy-Cu Composite: Toward Material Innovation of Nuclear Reactor Coolant System.

ABSTRACT: Refractory high-entropy alloys (RHEAs) are considered promising candidate materials for next-generation nuclear reactors due to their superior mechanical strength, irradiation resistance, and thermal stability at high temperatures. However, the significant positive heat of mixing between refractory alloying elements and Cu, commonly used in cooling systems, poses challenges in forming composite structures. This study addresses the issue using a liquid metal dealloying (LMD) process. A precursor alloy (WTaVTi) with a directional dendrite-interdendrite structure is fabricated and reacted with molten Cu at 1200 °C for 96 h. This approach produced a RHEA-Cu composite with a stable interface between RHEA (W_31.5Ta_30.9V_21.4Ti_14.3) and Cu, featuring a sp

SUBMITTER: Yoon KN 

PROVIDER: S-EPMC12716175 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature