TY - GEN
T1 - Chopped carbon fibers as pore-forming agent to fabricate the integral ceramic mold
AU - Miao, Kai
AU - Lu, Zhongliang
AU - Ji, Zhe
AU - Zhang, Hang
AU - Li, Dichen
N1 - Publisher Copyright:
Copyright © 2015 MS&T15®.
PY - 2015
Y1 - 2015
N2 - Based on stereolithgraphy (SL) and gelcasting technologies, the integral fabrication technique of ceramic mold for hollow turbine blade was put forward. The casting process of blade requires that the ceramic mold should have a porous microstructure for gas permeability and deformability to prevent hot tearing of the alloy. In order to fabricate a mold with controlled porosity, chopped carbon fibers were introduced as pore-forming agent in this study. The result found that the drying shrinkage of green samples was reduced to 0.12% after carbon fibers (CFs) were added. Unlike traditional pore-forming agents, the mid-temperature strength (400 °C) was improved rather than decreased from 1.75 to 3.42 MPa. The porosity of the final mold increased from 26% to 39.7%, while hollow rod arrays (microtubes) could be observed by scanning electron microscopy (SEM). At last, a bulk ceramic mold for a gas turbine blade was fabricated successfully, which was validated by X-ray scan.
AB - Based on stereolithgraphy (SL) and gelcasting technologies, the integral fabrication technique of ceramic mold for hollow turbine blade was put forward. The casting process of blade requires that the ceramic mold should have a porous microstructure for gas permeability and deformability to prevent hot tearing of the alloy. In order to fabricate a mold with controlled porosity, chopped carbon fibers were introduced as pore-forming agent in this study. The result found that the drying shrinkage of green samples was reduced to 0.12% after carbon fibers (CFs) were added. Unlike traditional pore-forming agents, the mid-temperature strength (400 °C) was improved rather than decreased from 1.75 to 3.42 MPa. The porosity of the final mold increased from 26% to 39.7%, while hollow rod arrays (microtubes) could be observed by scanning electron microscopy (SEM). At last, a bulk ceramic mold for a gas turbine blade was fabricated successfully, which was validated by X-ray scan.
KW - Chopped carbon fibers
KW - Gelcasting
KW - Integral ceramic mold
KW - Porosity
UR - https://www.scopus.com/pages/publications/84962565498
M3 - 会议稿件
AN - SCOPUS:84962565498
T3 - Materials Science and Technology Conference and Exhibition 2015, MS and T 2015
SP - 803
EP - 809
BT - Materials Science and Technology Conference and Exhibition 2015, MS and T 2015
PB - Association for Iron and Steel Technology, AISTECH
T2 - Materials Science and Technology Conference and Exhibition 2015, MS and T 2015
Y2 - 4 October 2015 through 8 October 2015
ER -