Zero thermal expansion in non-stoichiometric and single-phase (Hf,Nb)Fe2.5 alloy
Zero thermal expansion in non-stoichiometric and single-phase (Hf,Nb)Fe2.5 alloy
复制标题
DOI：
10.1016/j.scriptamat.2023.115388
复制
发表时间：
2023-05
影响因子：
6
通讯作者：
Xuyu Dong;K. Lin;Chengyi Yu;Wenbin Zhang;Wenjie Li;Qian Zhang;Qiang Zhang;Jue Liu;Yili Cao;X. Xing
中科院分区：
文献类型：
--
作者：
Xuyu Dong;K. Lin;Chengyi Yu;Wenbin Zhang;Wenjie Li;Qian Zhang;Qiang Zhang;Jue Liu;Yili Cao;X. Xing
零膨胀(ZTE)合金在热的影响下尺寸稳定，这在高精度部件中是关键的，但在单相材料中仍然很少见。报道了一种单相、近各向同性的中兴合金(Hf0.8Nb0.2)Fe2.5(αL≈1.0 7×10−6K−1)在5~460K温度范围内的非化学计量规律。过量Fe的引入打破了母合金的双相性质，延长了磁有序温度，并导致自旋重新取向。磁结构随温度的演化导致了中兴通讯的行为。通过非化学计量比调节来改变内部磁相互作用的设计理念为中兴通讯新材料的发现提供了支持。
Zero thermal expansion (ZTE) alloys are dimensionally stable under the influence of heat, which is critical in high-precision components but remains rare among single phase materials. This work reports a single phase and nearly isotropic ZTE alloy (Hf 0.8 Nb 0.2) Fe 2.5 over a wide temperature range of 5–460 K (α l≈ 1.07× 10− 6 K− 1) via non-stoichiometric regulation. The introduction of excess Fe breaks the dual-phase nature of parent alloy, extends the magnetic ordering temperature, and induces a spin reorientation. The evolution of magnetic structure versus temperature gives rise to the ZTE behavior. The design concept of changing the internal magnetic interaction through non-stoichiometric regulation provides support for the discovery of novel ZTE materials.