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.

Al基非晶合金由于其与常规的结晶Al基合金（400-500 MPa）相比的高强度（1200-1500 MPa）而具有巨大的商业应用潜力，尽管它们在熔体凝固时显示出结垢的限制。到目前为止，还没有以铝为主要成分的大块金属玻璃（BMG）的铸造是可能的。本研究的目的是利用粉末冶金技术制备高Al含量的新型块体铝基非晶合金，并克服这一局限性。为了实现这一目的，有必要设计具有明显的过冷液相区和高热稳定性的新型Al基非晶合金粉末，并优化通过机械合金化生产非晶Al基合金粉末和通过放电等离子烧结（SPS）实现其完全致密化的工艺条件。此外，有必要评估这些新的块体铝非晶合金的结构和热性能，它们的力学行为，并试图找到一个模型描述其力学性能，以及比较的结果与相应的asquenching合金。