Complex shaped boron carbides from negative additive manufacturing
作者： Ryan Lu , Swetha Chandrasekaran , Wyatt L. Du Frane , Richard L. Landingham , Marcus A. Worsley
DOI: 10.1016/J.MATDES.2018.03.026
关键词:
摘要: Abstract Complex shaped boron carbide with carbon (B4C/C) at near-full densities were achieved for the first time using negative additive manufacturing techniques via gelcasting. Negative involves 3D printing of sacrificial molds used casting copies. B4C powder distributions and rheology suspensions optimized to successfully cast complex shapes. In addition demonstrating scalability these geometries, hierarchically meso-porous structures also shown be possible from this technique. Resorcinol-Formaldehyde (RF) polymer was selected as gelling agent can pyrolyze into a aerogel network act sintering aid B4C. Due highly effective distribution in situ matrix, sintered density 97–98% theoretical maximum achieved.
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