U.S.-Australia Cooperative Research: The Grain Boundary Structure/Chemistry of FeAl

小行星9513186 该奖项将支持伊恩·贝克博士的旅行，塞耶 达特茅斯学院工程学院，使他能够与新南威尔士大学材料科学与工程学院的Paul Munroe博士进行合作研究。 这项工作的目的是进一步了解晶界之间的关系， 结构和化学以及FeAl中晶间断裂的发生，FeAl是一种具有潜在商业重要性的材料。 金属间化合物的塑性差和脆性断裂是金属间化合物的重要缺点。 本研究的重点是双晶中的晶界。 边界特征和宪法的混乱，改变铁铝比的影响，将被检查，以确定为什么一些GB的断裂和其他不。 三元合金添加剂的效果也将被检查，以确定为什么一些合金元素抑制晶界断裂。 拟议的工作将使用场发射枪扫描透射电子显微镜FEG STEM，该显微镜由新南威尔士大学和悉尼大学联合运营。 该项目汇集了调查人员的互补研究兴趣，并提供专门设备。

9513186 Baker The award will support the travel of Dr. Ian Baker, Thayer School of Engineering at Dartmouth College, to enable him to conduct collaborative research with Dr. Paul Munroe of the School of Materials Science and Engineering at the University of New South Wales. The proposed work aims to further an understanding of the relationship between grain boundary structure and chemistry and the occurrence of intergranular fracture in FeAl, a material of some potential commercial importance. Poor ductility and brittle fracture are important drawbacks of intermetallic compounds. The focus of this study is on grain boundaries (GBs) in bicrystals. The effects of boundary character and constitutional disorder, changing the ration of Fe to Al, will be examined with a view to determining why some GBs fracture and others do not. The effect of ternary alloying additions will also be examined to determine why some alloying elements suppress grain boundary fracture. The work proposed will use a field emission gun scanning transmission electron microscope, FEG STEM, which is jointly operated by the University of New South Wales and the University of Sydney. The project brings together the complementary research interests of the investigators with access to specialized equipment.