Microstructures of FeSi2 based thermoelectric materials prepared by rapid solidification and hot pressing
来源期刊：International Journal of Minerals Metallurgy and Materials2004年第1期
论文作者：Eckhard Mueller Cestmir Drasar Antje Mrotzek
文章页码：67 - 70
摘 要：<正> FeSi2 based thermoelectric materials have been prepared by melt spinning and vacuum hot pressing. Most of the rapidly solidified （melt spinning） powders are thin flakes with a thickness less than 0.1 mm. Scanning electron microscope （SEM） surface profiles show there are further finer grain structures with the characteristic size of about 100 run in a flake. The samples obtained by hot uniaxial pressing （HUP） in vacuum have densities higher than 90% the theoretical density of the materials. It was found by SEM observations that the microstructures are very different for vertical and parallel sections of the HUP samples. X-ray diffraction （XRD） analyses show there are some texture features in the samples. It is considered that the textures of the samples are originated from the orientation of the flakes that tended to align perpendicular to the hot press axis. WSi2 was introduced into the powders unexpectedly during melting process before the rapid solidification, but it makes the microstructures more eas
Eckhard Mueller，Cestmir Drasar，Antje Mrotzek
摘 要：<正> FeSi2 based thermoelectric materials have been prepared by melt spinning and vacuum hot pressing. Most of the rapidly solidified （melt spinning） powders are thin flakes with a thickness less than 0.1 mm. Scanning electron microscope （SEM） surface profiles show there are further finer grain structures with the characteristic size of about 100 run in a flake. The samples obtained by hot uniaxial pressing （HUP） in vacuum have densities higher than 90% the theoretical density of the materials. It was found by SEM observations that the microstructures are very different for vertical and parallel sections of the HUP samples. X-ray diffraction （XRD） analyses show there are some texture features in the samples. It is considered that the textures of the samples are originated from the orientation of the flakes that tended to align perpendicular to the hot press axis. WSi2 was introduced into the powders unexpectedly during melting process before the rapid solidification, but it makes the microstructures more eas
关键词：
