Comprehensive performance of a ball-milled La0.5Pr0.5Fe11.4Si1.6B0.2Hy/Al magnetocaloric composite

• 作者: Jiao-Hong Huang Ying-De Zhang Nai-Kun Sun Yang Zhang Xin-Guo Zhao Zhi-Dong Zhang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAG-NETIC, AND OPTICAL PROPERTIES
• 页码范围: 755-759
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/ac280b

摘要

Due to the hydrogen embrittlement effect,La(Fe,Si)13-based hydrides can only exist in powder form,which lim-its their practical application.In this work,ductile and thermally conductive Al metal was homogeneously mixed with La0.5Pr0.5Fe11.4Si1.6B0.2 using the ball milling method.Then hydrogenation and compactness shaping of the magne-tocaloric composites were performed in one step via a sintering process under high hydrogen pressure.As the Al content reached 9 wt.％,the La0.5Pr0.5Fe11.4Si1.6B0.2Hy/Al composite showed the mechanical behavior of a ductile material with a yield strength of～44 MPa and an ultimate strength of 269 MPa accompanied by a pronounced improvement in thermal conductivity.Due to the ease of formation of Fe-Al-Si phases and the several micron and submicron sizes of the compos-ite particles caused by ball milling process,the magnetic entropy change of the composites was substantially reduced to～1.2 J/kg·K-1.5 J/kg·K at 0 T-1.5 T.