Wahl L, Cicconi MR, Weichelt M, de Ligny D, Travitzky N (2022)
Publication Type: Journal article
Publication year: 2022
DOI: 10.1016/j.jeurceramsoc.2022.10.006
Layered multi-material ceramics are natural candidates for modern engineering applications due to their attractive mechanical properties. Residual stresses caused, for example, by a thermal mismatch during the processing of these materials can significantly affect their mechanical properties. In this work, Raman investigations were performed to estimate these residual stresses in layered reaction-bonded silicon carbide (RBSC) and reaction-bonded boron carbide (RBBC) composites fabricated by robocasting. The Raman measurements show that the residual stress in the silicon phase of RBSC and RBBC composites has a different sign, which can explain the crack formation that occurred after Si infiltration. To adjust the stresses and prevent this cracking, a new paste composition was investigated. SEM micrographs and Raman measurements showed that almost crack-free layered composites with similar stresses in the different layers could be realized. In addition, well-known analytical approaches were used to calculate these residual stresses.
APA:
Wahl, L., Cicconi, M.R., Weichelt, M., de Ligny, D., & Travitzky, N. (2022). Residual-stress-induced crack formation in robocasted multi-material ceramics: Stress considerations and crack prevention. Journal of the European Ceramic Society. https://dx.doi.org/10.1016/j.jeurceramsoc.2022.10.006
MLA:
Wahl, Larissa, et al. "Residual-stress-induced crack formation in robocasted multi-material ceramics: Stress considerations and crack prevention." Journal of the European Ceramic Society (2022).
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