Development of P/M magnesium alloys and corrosion of porous materials including P/M alloys

粉末冶金镁合金的开发及粉末冶金合金等多孔材料的腐蚀

• 批准号: 46264-2011
• 负责人: Kipouros, Georges
• 金额: $ 2.19万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568944
• 关键词: Development; magnesium; alloys; corrosion; porous

In the past quarter century the increasing cost of energy and increased environmental awareness has lead to a global requirement for the reduction of automotive emissions. One strategy for the reduction of emissions is reducing the gross weight of vehicles. As the weight is decreased, less fuel is consumed to propel the vehicle. Light metals such as aluminum and magnesium can reduce the weight of the vehicle. However, magnesium, the lightest structural metal, is difficult to form into usable shapes. One way to achieve this is via powder metallurgy (P/M). The first major effort of the present proposal is to investigate the development of new magnesium alloys for P/M processing that will reduce the porosity and will increase the mechanical properties of the alloys. The selection of the alloying constituents will be done on the basis of the previous expertise of the applicant and his team for an effective processing of the proposed alloy via P/M techniques. The alloys will be fully characterized and their microstructure will be determine as it affects the mechanical behaviour of the product. The second major effort of the proposal addresses the issues of corrosion of porous materials. With the advent of the production of nano-particles products contain a very large area which when exposed to corrosive conditions exhibit extremely high rates of corrosion. On the other hand the existence of high surface area is beneficial in case highly reactive materials are desirable such as in biomedical applications. In both cases it will be advantageous to be able to quantify the magnitude of the true surface area. The proposal aims to measure the surface area by applying, as a first step, techniques which were invented for powders to cases of solid samples of high porosity. A great help is also expected by the application of modern surface engineering investigative tools such as profilometry and digital imaging.

在过去的四分之一个世纪里，能源成本的上升和环境意识的提高导致了全球对减少汽车排放的要求。减少排放的一个战略是减少车辆的毛重。随着重量的减轻，驱动车辆所消耗的燃料也更少。铝和镁等轻金属可以减轻车辆的重量。然而，镁是最轻的结构金属，很难形成可用的形状。实现这一点的一种方法是粉末冶金(粉末冶金)。 本建议的第一个主要工作是研究开发用于粉末冶金加工的新型镁合金，以减少气孔率并提高合金的力学性能。合金成分的选择将基于申请人及其团队以前的专业知识，以便通过粉末冶金技术有效地处理拟议的合金。将对合金进行充分的表征，并确定其微观结构，因为它会影响产品的机械性能。 该提案的第二个主要努力涉及多孔材料的腐蚀问题。随着纳米粒子生产的到来，产品中含有非常大的面积，当暴露在腐蚀条件下时，表现出极高的腐蚀率。另一方面，高比表面积的存在有利于高活性材料的应用，例如在生物医学应用中。在这两种情况下，能够量化真实表面积的大小将是有利的。该提议旨在通过将发明的粉末技术应用于高孔隙率的固体样品来测量表面积，作为第一步。现代表面工程研究工具的应用，如轮廓术和数字成像技术的应用，也有望带来极大的帮助。