METHOD FOR MANUFACTURING THE HIGH STRENGTH ULTRA-FINE/NANO-STRUCTURED ALUMINUM COMPOSITE MATERIALS STRENGTHENED WITH QUASI-CRYSTALLINE PHASES BY MECHANICAL MILLING/ALLOYING

摘要

A method for manufacturing a composite material which enables refinement and uniform distribution of a quasi-crystalline phase reinforcement, forms a stable interface between the quasi-crystalline phase reinforcement and an Al matrix, and prevents strength deterioration of an Al matrix even in the hot consolidation process by using a mechanical milling/alloying process when manufacturing a quasi-crystalline phase reinforced Al matrix or Al alloy matrix composite material is provided. A method for manufacturing a high strength quasi-crystalline phase strengthened ultra-fine/nano-structured Al composite material by mechanical milling/alloying is characterized in that a composite material in which quasi-crystalline phase particles are dispersed uniformly and finely is manufactured from a mixed powder of quasi-crystalline phase powder, Al powder or alloy elements by the mechanical milling/alloying process. The quasi-crystalline phase has a volume ratio of 5 to 50%. The quasi-crystalline phase is relatively stably used at a high temperature just like Al65Cu20Fe15 quasi-crystalline phase even in the hot consolidation process of an Al composite material.