Micromanufacturing of metallic parts can be further developed if new technologies, such as hot-embossing, are better established. The versatility of this technique can be demonstrated through using different feedstocks in several mould features. However, reliability of the process increases by using specific binding systems in order to compensate the lack of shear stress as it exists in powder injection moulding. This study evaluates feedstocks made of pure aluminium powder mixed with a commercial binder based on polyolefin waxes and stearic acid. Some feedstocks were reinforced with carbon nanotubes. The effects of powder loading, feedstock composition as well as particle size on the replicability and surface roughness of hot-embossed micro parts were studied. Different characterization techniques, such as light and scanning electron microscopies and optical 3D micro coordinate system, were used to evaluate input materials, feedstock and green parts.
展开▼
