Characterization of zirconia-based slurries with different binders for titanium investment casting

The materials and physical properties of primary slurry are crucial to the surface quality of the finished castings, especially for high reactivity titanium alloys. The aim of this study is to investigate the influence of different binders on the physical properties of primary slurry for titanium al...

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Bibliographic Details
Published in:China foundry 2012-05, Vol.9 (2), p.125-130
Main Authors: Zhao, Ertuan, Kong, Fantao, Chen, Yanfei, Chen, Ruirun, Chen, Yuyong
Format: Article
Language:English
Subjects:
binder
Binders
Green strength
Investment casting
Physical properties
primary slurry
Slurries
Strength
titanium alloy
Titanium base alloys
Viscosity
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Summary:The materials and physical properties of primary slurry are crucial to the surface quality of the finished castings, especially for high reactivity titanium alloys. The aim of this study is to investigate the influence of different binders on the physical properties of primary slurry for titanium alloy investment casting. The zirconia-based slurries with different binders were evaluated by comparing the parameters： viscosity, bulk density, plate weight, suspensibility, gel velocity and strength. The results indicate that a higher viscosity of binder leads to a higher viscosity and suspensibility of slurry with the same powder/binder ratio. The retention rate and thickness of primary layer increase with an increase in the viscosity of the slurry, and a higher retention rate is associated with a thicker primary layer. The gel velocity of the slurry is correlated with the gel velocity of the binder. The green strength and the baked strength of the primary layer are determined by the properties of the binder after gel and by the production of the binder after fired, respectively.
ISSN:1672-6421
2365-9459