A multi-process approach towards the development of novel Mg alloys

开发新型镁合金的多工艺方法

• 批准号: RGPIN-2021-02449
• 负责人: Bichler, Lukas
• 金额: $ 2.84万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=743793
• 关键词: multi; process; approach; towards; development

For decades, technological advancements have been driven by the progress in materials science. For example, the substitution of iron components in automobiles with lighter aluminum components during the 1970's and 80's resulted in an immediate performance and fuel economy enhancement. In light of the global climatic challenges, governments internationally are mandating automakers to drastically decrease greenhouse gas emissions and improve fuel economy of vehicles, otherwise face economic penalties. It is generally accepted that the required improvement is achievable either by vehicle hybridization, or by vehicle weight reduction. Both approaches face challenges: 1) Hybridization is costly and adds weight to vehicles, and 2) Existing manufacturing processes for lightweight alloys are approaching technological limits and further advancements are costly.     In this Discovery program, we will explore an innovative multi-process approach to overcome the limits associated with existing manufacturing methods for ultralight high-strength magnesium (Mg) alloys. Specifically, an advanced powder metallurgy process (Spark Plasma Sintering, SPS) will be combined with a traditional metalcasting process to develop novel Mg alloy composites containing graphene-based additives. A critical goal will be to develop composites suitable for mass production, yet remaining cost efficient. Using SPS, graphene-based additives (e.g., graphene, graphene oxide or reduced graphene oxide) will be combined with Mg powder and sintered to form a master alloy. The sintered master alloy will be then subsequently added to liquid Mg alloys during casting operations, resulting in the dissolution of the Mg master alloy within the melt, followed by the release of the graphene-based additives in the melt. The additives will serve to simultaneously enhance the strength and ductility (via grain refinement and the modification of eutectics) and thermo-electric properties of the alloys. Using this approach, several critical challenges (e.g., particle settling, flotation or oxidation) associated with current treatment methods for liquid Mg alloys will be surpassed. Further, the novel composite alloys will be particularly tailored towards applications in the next-generation of hybrid / electric vehicles.     In addition to developing novel alloys for mass-produced Mg parts, our group will also investigate the effect of SPS process parameters and powder morphology on the sinterability of the master alloys and their interaction with the graphene-based additives. The generated knowledge will enable sintering of materials with precisely controlled microstructure and properties.     Experimental work in both areas will be carried out at my UBC laboratories and will provide HQP hands-on and fundamental knowledge in the fields of manufacturing and materials science. This program will provide a foundation for a novel approach to develop castable high-strength Mg alloys.

数十年来，技术的进步一直是材料科学的进步。 Oficl ES，否则脸部脸部脸部脸部脸部脸部脸部重量的重新挑战：1）杂交量是昂贵的，并增加了体重2）现有的轻量级制造过程是LES 。对于质量的生产，剩余的成本效率，石墨烯，氧化石墨烯或氧化石墨烯降低）将与MG粉末结合在一起，并烧结以形成主合金。然后在熔体中释放基于石墨烯的加成。与当前液体Mg Ys的方法相关的氧化）将进一步超过，新型的复合合金量身定制了针对Next Generation of Rid / ofrid / parice的应用，以开发用于质量生产的MG零件的新型合金研究SPS过程参数和粉末形态对主的效果，并且与基于石墨烯的添加剂相互作用。 HQP在制造业和材料科学领域的基本基础。