ADDITIVE MANUFACTURING OF SILICON COMPONENTS

    公开(公告)号:WO2021225809A1

    公开(公告)日:2021-11-11

    申请号:PCT/US2021/029053

    申请日:2021-04-26

    Abstract: A method of performing 3D printing of a silicon component includes adding powdered silicon to a 3D printing tool. For each layer of the 3D printing, the process includes forming a powder bed of the powdered silicon, forming a layer of the powder bed to a pre-determ ined thickness, directing a high-powered beam in a pre-determ ined pattern into the powder-bed to melt the powdered silicon. After no further layers are needed, the silicon component is cooled at a pre-determ ined temperature ramp-down rate. In a fully dense printing method, buffer layers of silicon are initially printed on a steel substrate, and then layers of silicon for the actual component are printed on top of the buffer layers using a double printing method. In a fully dense and crack free printing method, one or more heaters and thermal insulation are used to minimize temperature gradient during Si printing, in-situ annealing, and cooling.

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