中文摘要：

Fe-7.5%Mo-16.5%Si 第三的 quasiperitectic 合金的团结被使用微分扫描热量测定(DSC ) 和落下试管调查无容器的处理技术。主要阶段作为 R (Fe5Mo3Si2 ) 被识别， quasiperitectic 阶段是 1 (Fe5MoSi4 ) 并且 Fe3Si。与微滴直径的减少，微滴的冷却的率和 undercooling 很快增加。实验结果显示团结微观结构由残余组成主要阶段， quasiperitectic 阶段并且第三最容易溶解当微滴直径超过 400 m 时，而第三最容易溶解当微滴是比在直径的 400 m 小的时，被压制。

英文摘要：

Solidification of Fe-7.5%Mo-16.5%Si ternary quasiperitectic alloy is investigated by using differential scanning calorimetry （DSC） and drop tube containerless processing techniques. The primary phase is identified as R （Fe5Mo3Si2） and the quasiperitectic phases are τ1 （Fe5MoSi4） and Fe3Si. With the decrease of droplet diameter, the cooling rate and undercooling of the droplets increase rapidly. The experiment result indicates that the solidification microstructure is composed of remnant primary phase, quasiperitectic phases and ternary eutectic when the droplet diameter exceeds 400 μm, whereas the ternary eutectic is suppressed when the droplet is smaller than 400 μm in diameter.