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

作　　者：张集滕 王伟民 李桂华 马海健 秦敬玉 边秀房 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University [2]Key Laboratory of Metastable Materials Science and Technology, Yanshan University

出　　处：《中国有色金属学会会刊：英文版》2010年第1期71-77,共7页Transactions of Nonferrous Metals Society of China

基　　金：Projects(50871061, 50871062, 50631010, 50831003, 50801041) supported by the National Natural Science Foundation of China;Project (2008BS04020) supported by the Shandong Excellent Youthy Award Foundation, China;Project(NCET-06-584) supported by Ministry of Education of China;Project(2007CB613901) supported by the National Basic Research Program of China

摘　　要：The microstructures and thermal properties of Fe61Co9-xZr8Mo5WxB17 (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(-α), 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.The microstructures and thermal properties of Fe61Co9-xZr8Mo5WxBl7 （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（Aa）, 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.

关 键 词：热膨胀行为 铁基合金 微观结构 钼合金 扫描电子显微镜 透射电子显微镜 非晶 X射线衍射仪 

分 类 号：TB383.4[一般工业技术—材料科学与工程]