Beryllium intermetallic compounds (also called beryllides) such as Be12Ti, Be12V y Be12Zr are the most promising advanced neutron multipliers
The race to harness fusion energy - the process that powers the sun - has driven global research into high-performance materials capable of withstanding extreme heat, radiation, and plasma interactions. At Advent Research Materials, we supply high-purity metals, alloys, and polymers essential for fusion research applications. Our materials support critical areas such as plasma-facing components, hydrogen isotope containment, and structural reactor materials, enabling scientists and engineers to push the boundaries of fusion technology. Inside a tokamak, hydrogen isotopes (deuterium and tritium) are heated to extreme temperatures, forming a plasma where fusion occurs, releasing vast amounts of energy. These organisations are pioneering advancements in compact fusion reactors and alternative fusion approaches, driving innovation in plasma confinement, neutron shielding, and high-performance materials. * High-Purity Materials – We supply research-grade metals, alloys, and ceramics engineered to withstand extreme fusion conditions. By supplying critical materials for fusion reactor development, Advent Research Materials is proud to support scientists, engineers, and energy pioneers working towards commercial fusion power.
MIT researchers have found a way to make structural materials last longer under the harsh conditions inside a fusion reactor.
A recent paper published in the journal *Current Opinion in Solid State & Materials Science* examines a promising candidate for these reactors: ultra-high-temperature ceramics, or UHTCs. Researchers from the Department of Energy’s Oak Ridge National Laboratory, the University of Tennessee, Knoxville, and Stony Brook University collaborated on this study, highlighting the unique qualities of UHTCs and their potential to serve as plasma-facing components. This discussion addresses key questions about UHTCs, including their advantages over traditional materials, the role of plasma-facing components in fusion energy, the challenges in their application, and the critical effects of exposure to neutron radiation on their performance. ORNL has a long history in radiation damage research, with unique capabilities for neutron irradiation experiments at the High Flux Isotope Reactor (a DOE Office of Science user facility) and for characterizing neutron-irradiated radioactive materials at the Low Activation Materials Development and Analysis lab, resources rarely found elsewhere.
www.orau.org/ornl Fusion structural materials 5 5 Requirements for Fusion • For fusion – High enough energy – High enough confinement time – High enough particle density 6 6 Small scale devices are easily capable of causing fusion reactions Me as a graduate student next to a fusion-producing device at the University of Wisconsin Taylor Wilson -Started making IEC fusion devices in his garage at age 14 IEC=inertial electrostatic confinement is one method of creating fusion reactions in a lab http://www.sciradioactive.com/fusiongallery/ 7 7 Requirements for Fusion • For fusion – High enough energy – High enough confinement time – High enough particle density • For power reactor, additionally – Create fusion efficiently so that (power in)<(power out) – Sustain the fusion reaction (steady state or pulsed) over ~years with minimal maintenance periods – Capture the generated energy to produce electricity All these challenges require materials innovation Easy 8 8 Conceptual Idea of a Tokamak https://eswrenewableenergystudy.wordpress.com/2012/04/ 9 9 A real experiment reactor is much more complicated than the concept • A power reactor will have even more systems and more harsh conditions than ITER http://www.iter.org/mach I visited the ITER site 10 10 Fusion Materials: Fact or Fiction • Iron Man’s arc reactor – https://www.youtube.com/watch?
The high heat fluxes, high neutron energies, tritium breeding, and containment constraints place immense performance requirements on materials for the PFC/FW structures. This report focuses on the performance of fusion system PFC materials and the associated FW materials under conditions anticipated for near-term and advanced fusion demonstration and power systems. PFC/FW issues apply to most fusion systems regardless of the plasma confinement approach and must stand up to the most extreme operating conditions of all system components. The conditions which must be endured for DT fusion are more damaging to PFC/FW materials than other fusion fuel combinations due to the high energy neutrons produced. While there are multiple fusion system design issues that cannot be directly tested at the scale required to qualify a commercial-grade system, there are two issues that are always cited as major concerns for qualifying PFC and FW materials: irradiation effects and extreme heat loads.
Although research reactors such as HFIR are often used for materials tests, these fission-based materials test reactors expose materials to significantly more.
0 9 8 7 6 5 4 3 2 1 0 Shelf Energy [J] 4 00 350 300 2 50 200 150 T [K] OPTIMAX A F82H ∆ D BT T ≅ 78 K 190 K 268 K 185 K 326 K ∆ DBT T ≅ 141 K Figure 1:Shift of the DBTT for the F82H and OPTIMAX A steels after 2 dpa irradiation There are a number of issues still open regarding the behavior of these LAS: (i) Although the normal tensile properties are practically not affected, there is an increasing body of evidence showing that, contrary to what was expected in this temperature region, the presence of He induces an additional shift in the DBTT, already at low He contents [8].