Bulk amorphous Al-alloys by ball milling and spark-plasma-sintering

球磨和放电等离子烧结大块非晶铝合金

• 批准号: 5452165
• 负责人: Professor Dr.-Ing. Jürgen Eckert
• 金额: --
• 依托单位: Lehrstuhl für Materialphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5452165?language=en
• 关键词: Bulk; amorphous; Al; alloys; ball

Al-based amorphous alloys have been suggested for commercial applications with a great potential due to their high strength (1200-1500 MPa) compared to conventional crystalline Al-based alloys (400-500 MPa) even though they have shown a limit of scale upon solidification of the melt. Up to now no casting of bulk metallic glasses (BMGs) with aluminum as majority component is possible. The purpose of this project is to develop novel bulk Al-based amorphous alloys with high content of Al by powder metallurgy and to overcome this limitation. In order to achieve this purpose it is necessary to design novel Al-based amorphous alloy powders with a distinct supercooled liquid region and high thermal stability, and to optimize the processing conditions for the production of amorphous Al-based alloy powders by mechanical alloying and for their full densification through Spark Plasma Sintering (SPS). In addition, it is necessary to evaluate the structural and thermal properties of these novel bulk Al-amorphous alloys, their mechanical behavior and to try to find a model description for their mechanical properties, as well as to compare the results with those of corresponding asquenched alloys.

与常规的晶体基于Al Al Al的合金（400-500 MPa）相比，基于Al基的非晶合金对于具有巨大强度（1200-1500 MPA）的商业应用，即使它们在固化熔体时表现出规模限制，即使它们显示出尺度的极限。到目前为止，由于大多数组件，都没有用铝制的散装金属眼镜（BMG）铸造。该项目的目的是开发具有粉末冶金含量高的Al含量高的新型基于Al的无定形合金，并克服了这一限制。为了实现此目的，有必要设计具有独特的超冷液体区域和高热稳定性的新型基于Al的无定形合金粉末，并通过机械合金和通过Sparkma sistering（SPS）来优化生产无定形AL基于基于非晶的Al基合金粉的加工条件。另外，有必要评估这些新型大量Al-Al-Al-Al-Ol-olyoys的结构和热性能，它们的机械行为，并试图找到其机械性能的模型描述，并将结果与​​相应的敏感合金的结果进行比较。