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公开(公告)号：US10933414B2
公开(公告)日：2021-03-02
申请号：US15685095
申请日：2017-08-24
Inventor： Patrick Kwon , Junghoon Yeom
IPC: C04B35/01 , B01J19/00 , B81C99/00 , B32B18/00 , C04B35/64 , B01L3/00 , B01J8/00 , B01J8/34 , B01J19/02 , C04B35/65 , G01N30/68
Abstract: The disclosure relates to microchemical (or microfluidic) apparatus as well as related methods for making the same. The methods generally include partial sintering of sintering powder (e.g., binderless or otherwise free-flowing sintering powder) that encloses a fugitive phase material having a shape corresponding to a desired cavity structure in the formed apparatus. Partial sintering removes the fugitive phase and produces a porous compact, which can then be machined if desired and then further fully sintered to form the final apparatus. The process can produce apparatus with small, controllable cavities shaped as desired for various microchemical or microfluidic unit operations, with a generally smooth interior cavity finish, and with materials (e.g., ceramics) able to withstand harsh environments for such unit operations.
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公开(公告)号：US20170348770A1
公开(公告)日：2017-12-07
申请号：US15616267
申请日：2017-06-07
Inventor： Patrick Kwon
CPC classification number: B33Y70/00 , B22F1/0011 , B22F3/008 , B22F2998/10 , B22F2999/00 , B33Y10/00 , C22C38/00 , B22F1/0059 , C22C33/02 , B22F1/0014 , C22C33/0292 , B22F3/1021 , B22F3/1035 , C22C1/058
Abstract: The disclosure relates to sintering compositions that can be used in three-dimensional printing or additive manufacturing processes. The sintering compositions generally include one or more metallic iron-containing powders and a minor amount of a boron-containing powder as a sintering aid. Sintered models or products formed from the sintering compositions have substantially improved density and surface roughness values relative to models formed without the boron-containing powder.
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