Laser Sintering of Multilayer Gradient Materials
Selective laser sintering (SLS) is an unconventional sintering process , which consists in depositing a thin powder layer on a substrate and sintering it under incident laser beam scanned over the surface. The selective laser sintering is commonly used as a method of rapid prototyping of parts and articles i.e. for production of templates by their computer aided design and following layer-by-layer manufacturing [1,2]. The main requirement to the final product is the accordance between projected geometrical dimensions and ones of the real product [3,4]. Such kind of SLS application is widely used in industry as soon as the DTM Corp. designed and produced several types of laser plants, working at 50 metallurgical companies . Materials commonly used for rapid prototyping are polycarbonates, wax, pure and glass-filled up nylon, and metals. Ceramic prototypes are produced by SLS of mixtures containing binder, the lowmelting point component (polymer), and ceramic powder, the high-melting point component. Then the binder is removed by burning out in air.
KeywordsTitania Porosity Nickel Crystallization Migration
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