Influence of powder bonding on mechanical properties and magnetocaloric effects of La 0.9 Ce 0.1 (Fe,Mn) 11.7 Si 1.3 H 1.8

Bonded samples of La0.9Ce0.1Fe11.7Si1.3H1.8 and La0.9Ce0.1Fe11.41Mn0.29Si1.3H1.8 with NaZn13-type cubic structure have been prepared, and their mechanical properties and magnetocaloric effects have been investigated. The bonded samples show a very good compressive strength of 320 and 332 MPa, about 10% and 14% higher than that of bulk LaFe10.99Co0.91Si1.1B0.2 compound. By partial substitution of Mn for Fe, the Curie temperature (Tc) of bonded La0.9Ce0.1Fe11.7Si1.3H1.8 decreases remarkably from 325 to 279 K. The magnetic entropy change (ΔSm) for bonded La0.9Ce0.1Fe11.7Si1.3H1.8 and La0.9Ce0.1Fe11.41Mn0.29Si1.3H1.8 slightly reduces compared with hydride alloys, but still maintains large values of 8.8 and 7.9 J/kg K. The two bonded samples exhibit the same adiabatic temperature change (ΔTad) of about 2.6 K under a field change from 0 to 1.5 T. The bonded La0.9Ce0.1(Fe,Mn)11.7Si1.3 hydrides samples with good magnetocaloric effects and better mechanical properties are promising as high performance magnetic refrigerants materials.