Microstructures and thermoelectric properties of Fe0.92Mn0.08Si(sub x) alloys prepared by rapid solidification and hot pressing

Iron disilicide based thermoelectric materials Fe0.92Mn0.08Si(Sub x)(1.9 less than or equal to x less than or equal to 2.5) were prepared by rapid solidification (melt spinning) and hot uniaxial pressing at 1248 K with 50 MPa for 30 min, followed by annealing at 1073 K for 20 h. A maximum figure of merit, ZT=0.17, was obtained for Fe0.92Mn0.08Si2.0 at 973 K.