Development of low neutron absorption low-temperature beta-Zr alloys

This project aims to develop a new alloy of zirconium (Zr) to be used in nuclear rockets for space. The rocket engines operate at temperatures that are too high for conventional Zr alloys (~1200ºC). This project draws knowledge from the titanium industry, to stabilise the high-temperature phase (β phase) of Zr, using alloys additions. An additional challenge is that these alloying additions must not significantly sacrifice the exceptional neutron transparency of pure Zr. The project is chiefly experimental in nature. If successful, the researchers will produce the first β-Zr alloy that is stable from 400ºC to more than 1400ºC, and will enable a new design of reactor cores for space exploration. The feasibility study started in September 2024 and identified a set of alloying additions that have promising potential to meet our objectives. Additionally, Honours student Sergio Bao Hou has been trained on instruments and inducted to the relevant labs.