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- Title
Research on the Hot Strength and Retained Strength of Shells Reinforced by Dispersed Fibers for Investment Casting.
- Authors
Li, Yanfen; Liu, Xiangdong; Lu, Yan; Lű, Kai
- Abstract
The properties of ceramic shells determine the casting quality in the investment casting process. Research results regarding the addition of various fibers to the shell suggest that the green strength, the fired strength, and even the permeability of the fiber-reinforced shell are increased. In this work, the hot strength and the retained strength of a shell reinforced by dispersed polypropylene fibers were investigated based on previous research. The results show that the maximum hot strength of the shell prepared via the conventional method (CM) and the preimmersion slurry method (PSM) for a fiber content of 0.6 wt% increase by 58.31% and 37.94% compared with those of the fiber-free shell, respectively. When the fiber content is less than 0.6 wt%, the retained strength of the shell prepared via the PSM is close to that of the shell obtained through the CM. Through X-ray diffraction and energy-dispersive X-ray spectroscopy, it was found that the hot strength and the retained strength of the fiber-reinforced shell primarily consist of a glass-phase in the matrix and holes left by the burned-out fibers. Besides, the retained strength of the fiber-reinforced shell prepared via the PSM was also affected by the carbonized fiber. The permeability of the shell with the fiber additive is improved.
- Subjects
INVESTMENT casting; POLYPROPYLENE fibers; FIBERS; X-ray spectroscopy; X-ray diffraction; HOT carriers; SLURRY
- Publication
International Journal of Metalcasting, 2023, Vol 17, Issue 2, p761
- ISSN
1939-5981
- Publication type
Article
- DOI
10.1007/s40962-022-00803-y