【摘 要】
：
Three nanocrystalline alloys, Fe50Al50, Fe42.5Al42.5Ti5B10 and Fe35Al35Ti10B20 (molar fraction,%), were synthesized from elemental powders by high-energy ball m
【机 构】
：
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
论文部分内容阅读
Three nanocrystalline alloys, Fe50Al50, Fe42.5Al42.5Ti5B10 and Fe35Al35Ti10B20 (molar fraction,%), were synthesized from elemental powders by high-energy ball milling. The structural evolutions and morphological changes of the milled powders were characterized by X-ray diffractometry(XRD), transmission electron microscopy(TEM) and scanning electron microscopy(SEM). The effects of different Ti, B additions on the structure and phase transformation in these alloys were also discussed. It is observed that the diffusion of Al, Ti, B atoms into Fe lattice occurs during milling, leading to the formation of a BCC phase identified as Fe(Al) or Fe(Al, Ti, B) supersaturated solid solution. Fe-based solid solution with nanocrystalline structure is observed to be present as the only phase in all the alloy compositions after milling. Furthermore, the contents of Ti, B affect the formation of mechanical alloying products, changes in the lattice parameter as well as the grain size.
其他文献
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
Fenton’s oxidation method was successfully used to synthesize an ideal titania film in situ on NiTi shape memory alloy(SMA) for medical applications. Character
目的了解掌握青岛市农村居民饮水现状,为政府决策提供技术支持。方法对2010-2012年对全市涉农区市集中式供水工程进行水源类型、水处理方式等基础信息调查和水质采样检测。结
工程量清单招标以其特有的实用性和规范性被广泛推广和普遍应用.但在实施过程中,对业主和投标单位存在许多风险因素.只有在全过程的造价管理中采取积极而有效的防范策略,才能
1控制农药的污染蔬菜残留农药有机磷能引起神经功能紊乱,出现一系列神经毒性表现,重者中毒死亡。但在目前的条件下,无公害蔬菜的生产还离不开化学农药,因此在使用过程中,必须
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
The effect of partial substitution of A1 for Cu on the glass forming ability(GFA) and mechanical properties of Mg65Cu25-xAlxGd10 (x=0, 1, 3 and 5, molar fractio
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
The forming limits of nickel coating on the right region were studied, so as to direct the preparation of the material and help the production of workpieces. Th