过渡族金属基块体金属玻璃磁热效应的研究

Compared with traditional vapour-compression refrigeration, magnetic refrigeration has the advantages of high efficiency, energy conservation and environmentally friendly without pollution, and therefore attracting more and more attention. One of the key subjects in the area of magnetic refrigeration is to develop new magnetic refrigeration materials with a large magnetocaloric effect (MCS). As new type of magnetic refrigerants, amorphous alloys exhibit a wide temperature region of magnetic-order transition and high refrigeration capacity, and   is well-suited to magnetic Ericsson refrigeration cycle. Among these amorphous alloys, transition-metal (Fe, Co, Ni) based amorphous alloys display the unqiue properties, such as low cost, good corrosion resistance, and very low magnetic and thermal hysteresis. and thus may be considered as suitable candidates for magnetic refrigerants. The work of this project is to study the MCE of transition-metal (Fe, Co, Ni) based bulk metallic glasses (BMGs), and investigate the effects of the composition of components, the addition of rare earth elements, internal atomic arrangement state and so on, on the MCE of transition-metal based BMGs, and hence reveal the physics mechanism of the MCE. Through this project, we will have the chance to develop new transition-metal based BMGs magnetic refrigerants with large MCE and high refrigeration capacity.

相比于传统气体压缩制冷，磁制冷具有高效、节能以及无污染环境友好等优点，吸引了越来越多的关注。磁制冷领域的一个关键课题就是开发具有大磁热效应的新型磁制冷材料。非晶态合金作为一种新的磁制冷材料，具有磁有序转变温度跨区大，制冷能力强的特点，非常适合于埃里克森制冷循环。其中，过渡族金属（Fe、Co、Ni）基非晶态合金由于成本低廉，耐蚀性好，且磁滞热滞很低，成为近年来非常有竞争力的磁制冷候选材料。本项目将针对过渡族金属（Fe、Co、Ni）基块体非晶态合金的磁热效应展开研究，探讨组元成分、稀土金属元素掺杂、微观原子排布状态等对过渡族金属基块体非晶态合金磁热效应的影响，进而揭示其磁热效应的物理机制。基于本项目的研究，使我们有机会获得一系列具有大磁热效应和高制冷能力的过渡族金属基块体非晶态合金的磁制冷材料。

比于传统气体压缩制冷，磁制冷具有高效、节能以及无污染环境友好等优点，吸引了越来越多的关注。磁制冷领域的一个关键课题就是开发具有大磁热效应的新型磁制冷材料。非晶态合金作为一种新的磁制冷材料，具有磁有序转变温度跨区大，制冷能力强的特点，非常适合于埃里克森制冷循环。其中，过渡族金属（Fe、Co、Ni）基非晶态合金由于成本低廉，耐蚀性好，且磁滞热滞很低，成为近年来非常有竞争力的磁制冷候选材料。在本项目中，我们研究了制备冷速以及高熵效应对过渡族金属基非晶态合金磁热性能的影响；研究了过渡族金属、稀土金属元素添加对Fe基块体非晶态合金磁热性能的影响；开发了具有近室温磁热效应的高铁含量Fe-类金属系以及全金属系Fe基非晶合金；等，到目前为止，申请书中的研究内容基本完成。本项目的研究对于未来发展具有优异磁热性能以及近室温磁热效应的过渡族金属基块体非晶态合金磁制冷材料有一定的参考价值和意义。