Towards Stainless Magnesium

交通运输部门的二氧化碳排放量占加拿大温室气体总量的25% (GHG)政府的目标是到2050年将温室气体减少45-65%。节省10%的成本， 车辆重量导致6-8%的燃油经济性改善，这意味着（在汽车的寿命期间） 17-20公斤减少二氧化碳排放量，每公斤车辆重量减少。轻质镁（Mg）， 铝（Al）的2/3和钢的1/4的密度提供了独特的燃料效率优势， 针对汽车应用的排放。在这方面，Mg的一个关键缺点是它对 腐蚀，这限制了它的广泛应用。最近，某些合金元素，如砷（As），以 发现低水平的Mg会阻碍导致Mg腐蚀的化学反应[1]。FCA Canada Inc.是 有兴趣开发一种耐腐蚀的镁合金（“不锈镁”），以扩大使用轻质 汽车的结构部件。在本项目中，我们将开发耐腐蚀的汽车镁合金 在Mg-Al基合金中加入As、铋（Bi）、锑（Sb）和/或铈（Ce）的微量元素 通常用于汽车应用中。在拟议的项目中，目标是：（i）设计Mg-Al-As， Mg-Al-Bi和Mg-Al-Sb基合金，使用热力学计算（FactSage）;（ii）表征 所选合金成分的微观结构/相选择，以验证热力学计算;以及 (iii)对所选组合物的机械性能进行初步评价。成功 该项目的成果将为与FCA的长期合作铺平道路， 镁合金，以创新，并确保更高的市场份额。加拿大的下游一级/二级供应商将 也受益于该项目的积极成果。在本项目中接受培训的HQP将拥有以下方面的关键专业知识： 轻型运输应用，并将有助于保持这些关键行业在加拿大。他们将被定位为 推动国内镁转化行业的发展，并具有可转移的电子技术， 显微镜、X射线衍射、机械测试和计算材料工程。

Growing CO2 emissions from the transportation sector contribute 25% of Canada's total greenhouse gas (GHG) emissions; the government has a target for reducing GHGs by 45-65% by 2050. Ten percent saving in vehicle weight leads to 6-8% fuel economy improvement, which translates (during the life time of a car) to 17-20 kg reduced emissions of CO2, per kg of vehicle weight reduced. Lightweight magnesium (Mg) with density 2/3 of aluminum (Al) and 1/4 of steel offers unique advantages for fuel efficiency and reduced emissions in targeted automotive applications. A key shortcoming of Mg in this effort is its susceptibility to corrosion, which limits its wide application. Recently, certain alloying elements such as arsenic (As) added at low levels were found to retard the chemical reactions leading to the corrosion of Mg [1]. FCA Canada Inc. is interested in developing a corrosion resistant Mg alloy ("stainless Mg") to widen the use of lightweight structural components in its vehicles. In this project, we will develop corrosion resistant automotive Mg alloys using trace element additions of As, bismuth (Bi), antimony (Sb) and/or cerium (Ce) to Mg-Al based alloys commonly used in automotive applications. In the proposed project, the objectives are: (i) to design Mg-Al-As, Mg-Al-Bi and Mg-Al-Sb based alloys using thermodynamic calculations (FactSage); (ii) to characterize the microstructures /phase selection of selected alloy compositions to validate the thermodynamic calculations; and (iii) to conduct a preliminary evaluation of the mechanical properties of selected compositions. The successful outcome of this project will pave the path to long term collaboration with FCA to develop corrosion resistant Mg alloys, to innovate, and to secure higher market share. Downstream Tier I/Tier II suppliers in Canada will also benefit from the positive outcome of this project. HQP trained in this project will have key expertise in the lightweight transport applications and will help keep these key industries in Canada. They will be positioned to advance the magnesium transformation industry in the country and have transferable skills in electron microscopy, x-ray diffraction, mechanical testing and computational materials engineering.