Abstract
Accelerating advancements in technological systems have demonstrated a need for alloys with drastically improved thermomechanical and chemical properties, called superalloys. Ceramic molds are typically used in near-net shape investment casting processes of superalloy components due to their chemical inertness and high-temperature capabilities. Ceramic molds, however, often suffer from shortcomings in vital properties including flexural strength, thermal shock resistance, permeability, dimensional stability, corrosion resistance, and leachability, which have restricted their ability to adequately process modern alloy castings. This study analyses these limitations and illustrates how to address them, particularly regarding ceramic mold and slurry design, processing of shells and cores, material selection, and testing and characterization. By utilizing advanced processing methods including additive manufacturing and gel-casting, more dimensionally accurate and preferentially built molds can be formed. Additionally, by varying the mold composition to achieve more chemically inert structures, reactions with the mold can be mitigated to reduce chemically induced defects.
Recommended Citation
J. E. Kanyo et al., "An overview of ceramic molds for investment casting of nickel superalloys," Journal of the European Ceramic Society, vol. 40, no. 15, pp. 4955 - 4973, Elsevier, Dec 2020.
The definitive version is available at https://doi.org/10.1016/j.jeurceramsoc.2020.07.013
Department(s)
Materials Science and Engineering
Keywords and Phrases
Ceramic core; Characterization; Investment casting; Nickel superalloys; Refractories
International Standard Serial Number (ISSN)
1873-619X; 0955-2219
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Elsevier, All rights reserved.
Publication Date
01 Dec 2020
Comments
University of Connecticut, Grant None