Correlation between microstructure and thermal dilation behavior ofamorphous Fe-Co-Zr-Mo-W-B alloys

来源期刊：中国有色金属学报(英文版)2010年第1期

论文作者：张集滕 王伟民 李桂华 马海健 秦敬玉 边秀房

文章页码：71 - 77

Key words：glass forming ability; viscosity; fragility; Fe-based alloys

Abstract: The microstructures and thermal properties of Fe₆₁Co_9-xZr₈Mo₅W_xB₁₇ (x=0 and 2) formed under different vacuum conditions were investigated by scanning electron microscopy(SEM), X-ray diffractometry(XRD), transmission electron microscopy(TEM), and conventional dilatometry(DIL). The variation of the non-monotonic effects of tungsten content and vacuum conditions on the glass forming ability(GFA) of Fe-based alloys can be drawn in a schematic diagram. The higher the GFA of alloys, the higher the difference between the thermal expansion coefficients of glassy state and crystalline state(Δα), which can be described by the free volume model during dilatometric measurements. Under low and high vacuum conditions, the viscosity and microhardness are improved and the fragility of the Fe-based alloys are decreased by adding tungsten.

基金信息：the National Natural Science Foundation of China
the Shandong Excellent Youthy Award Foundation, China
Ministry of Education of China
the National Basic Research Program of China