Fabrication of ceramic cores via layered extrusion forming using graphite as pore-forming agent

被引：3
|
作者：
Tang, Shiyan [1 ]
Yang, Li [1 ]
Li, Guanjin [1 ]
Liu, Xinwang [1 ]
Fan, Zitian [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan, Hubei, Peoples R China
来源：
4TH INTERNATIONAL CONFERENCE ON APPLIED MATERIALS AND MANUFACTURING TECHNOLOGY | 2018年 / 423卷
基金：
中国国家自然科学基金;
关键词：
CARBIDE;
D O I：
10.1088/1757-899X/423/1/012065
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Graphite powders were introduced in aqueous alumina paste to prepare alumina cores with high porosity using layered extrusion forming, which was a type of additive manufacturing methods. Rheological behaviours of pastes with different solid loading were tested. Paste composed of 50vol.% alumina loading and 5g graphite powders generated specimens with highest shape retention and finest surface quality. During formation and sintering process, basic shapes of rectangular specimens could be well maintained. With the increase of graphite addition, open porosity increased and flexural strength decreased of sintered specimens. Specimens prepared from paste with 50vol.% alumina loading and 10g graphite powders possessed best comprehensive performance, which was promising for application in alloys casting.
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页数：6
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