The electrochemical behaviour of magnetocaloric alloys La(Fe,Mn,Si)₁₃H_x under magnetic field conditions

Abstract

Key factors representative of the in operando magnetocaloric-effect-based cooling system have been systemically investigated on the La(Fe,Mn,Si)13Hx alloys.

The effect of hydrogen on the multiscale mechanical behaviour of a La(Fe,Mn,Si)13-based magnetocaloric material

“…These materials are chemically reactive and have a low toughness [12,13]. Whilst the electrochemical behaviour of these materials in magnetic fields has been carefully studied and routes to protection developed [14], mechanical challenges still remain. The overall mechanical stability of these brittle materials is highly sensitive to small defects such as cracks.…”

“…The overall mechanical stability of these brittle materials is highly sensitive to small defects such as cracks. During manufacturing and operational processes, potential origins for crack development include mechanical load upon machining, volume expansion of the La-rich phase in air/water, thermal stress during hydrogenation, and volume change incompatibility at the first-order magnetic phase transition (the volume change is up to ~2% depending on the composition) [7,[14][15][16][17][18][19].…”