Atomized Fe-Al Processing Powder for In-Situ Ceramic Composites

The patent applies preliminary action by incorporating reactive elements (such as aluminum, titanium, boron) directly into the powder feedstock before manufacturing. This allows the ceramic phase to form in-situ during the additive manufacturing process through controlled reactions with the matrix material, eliminating the need for complex post-processing steps or pre-formed ceramic reinforcements. The reactive elements are prepared in advance as part of the powder mixture, enabling simplified manufacturing while achieving the desired composite properties.

The patent replaces traditional mechanical machining with additive manufacturing technology. Instead of removing material through cutting, drilling, or milling operations, the component is built layer-by-layer from powder feedstock using energy sources such as lasers or electron beams. This substitution of mechanical removal processes with additive construction enables the fabrication of geometrically complex components with near-net-shape accuracy, dramatically reducing material waste while maintaining or improving structural integrity.

The patent employs composite materials strategy by creating a metal-matrix composite where a metallic matrix (such as iron or nickel-based) is reinforced with ceramic phases formed in-situ from reactive elements. This composite structure provides oxidation and corrosion resistance through the formation of protective oxide layers from the ceramic phase (such as aluminum oxide or chromium oxide), while maintaining lower density compared to high-alloy steels. The composite architecture allows tailoring of properties to achieve protection without the excessive weight and cost of traditional high-alloy formulations.

The patent merges multiple processing steps into a single integrated additive manufacturing process. The mixing of reactive elements with the matrix material, the formation of the ceramic phase, and the consolidation of the composite structure all occur simultaneously during the layer-by-layer building process. This consolidation eliminates the need for separate mixing, reinforcement insertion, and consolidation steps that would be required in traditional composite manufacturing, thereby significantly improving production efficiency while maintaining enhanced material properties.