Sharma Vaibhav, Barua Radhika
Department of Mechanical & Nuclear Engineering, Virginia Commonwealth University, 401 West Main Street, Richmond, VA 23284, USA.
Materials (Basel). 2024 Aug 6;17(16):3886. doi: 10.3390/ma17163886.
The ternary transition metal boride FeAlB is a unique ferromagnetic "MAB" phase that demonstrates a sizable magnetocaloric effect near room temperature-a feature that renders this material suitable for magnetic heat pump devices (MHP), a promising alternative to conventional vapor compression technology. Here, we provide a comprehensive review of the material properties of FeAlB (magnetofunctional response, transport properties, and mechanical stability) and discuss alloy synthesis from the perspective of shaping these materials as porous active magnetic regenerators in MHPs. Salient aspects of the coupled magnetic and structural phase transitions are critically assessed to elucidate the fundamental origin of the functional response. The goal is to provide insight into strategies to tune the magnetofunctional response via elemental substitution and microstructure optimization. Finally, outstanding challenges that reduce the commercial viability of FeAlB are discussed, and opportunities for further developments in this field are identified.
三元过渡金属硼化物FeAlB是一种独特的铁磁“MAB”相，在室温附近表现出显著的磁热效应，这一特性使该材料适用于磁热泵装置（MHP），是传统蒸汽压缩技术的一种有前景的替代方案。在此，我们全面综述了FeAlB的材料特性（磁功能响应、输运性质和机械稳定性），并从将这些材料成型为MHP中的多孔活性磁体的角度讨论了合金合成。对耦合磁和结构相变的显著方面进行了批判性评估，以阐明功能响应的基本起源。目标是深入了解通过元素替代和微观结构优化来调节磁功能响应的策略。最后，讨论了降低FeAlB商业可行性的突出挑战，并确定了该领域进一步发展的机会。
