|About this Abstract
||Materials Science & Technology 2020
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Diffusion Behavior and Mechanical Properties of the Aluminum / Tungsten Metallic System
||Ammar Alyasari, Raghavan Srinivasan
|On-Site Speaker (Planned)
The binary aluminum-tungsten system shows three intermediate compounds, Al12W, Al5W, and Al4W. This presentation will cover the results of a study of diffusion behavior in this system, using powder compacts of pure aluminum and pure tungsten. Prior studies have shown that Al12W forms as a thin layer on the tungsten particles, and the amount of Al5W formed is negligible. Through heat treatment, it is possible to control the relative amounts of the phases that are formed. It is important to understand mechanisms that control the diffusional transformation since the intermetallics are formed at the interface between the aluminum and tungsten powder particles. The Broeder diffusion theory was used to analyze the diffusion behavior in this system. The interface layer thickness and chemical composition were measured using high-resolution SEM with EDS. The effect of the formation of the intermediate phases on the mechanical properties of the composite was also evaluated.