Mark W. Broadley,James Alan Sago,Hao Chen,Edward J. Schweitzer,John Eckert,Jeffrey M. Farina
申请号：
US15730802
公开号：
US20180029129A1
申请日:
2017.10.12
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A method of pressure forming a brown part from metal and/or ceramic particle feedstocks includes: introducing into a mold cavity or extruder a first feedstock and one or more additional feedstocks or a green or brown state insert made from a feedstock, wherein the different feedstocks correspond to the different portions of the part； pressurizing the mold cavity or extruder to produce a preform having a plurality of portions corresponding to the first and one or more additional feedstocks, and debinding the preform. Micro voids and interstitial paths from the interior of the preform part to the exterior allow the escape of decomposing or subliming backbone component substantially without creating macro voids due to internal pressure. The large brown preform may then be sintered and subsequently thermomechanically processed to produce a net wrought microstructure and properties that are substantially free the interstitial spaces.
