Effect of Additions on Properties of the Mullite-Based Investment Materials

Abstract:

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Additives will affect directly the clinic operational properties of investment materials, and finally affect the quality of castings. The relationship between additions and properties of the mullite-based investments has been studied. This paper describes effect of HBO3, Na5P3O10 and (NaPO3)6 on properties (including fluidity, initial setting time and compressive strength) of the mullite-based investment materials.It is found that with addition of HBO3, the fluidity of the mullite-based investment materials improves greatly, the initial setting time prolongs, and the compressive strength of investment materials changes little;with addition of Na5P3O10, the fluidity of mullite-based investments improves greatly, the compression strength increases, and the amount of silica gel decreases clearly;with addition of (NaPO3)5, the fluidity of mullite-based investments increases, the initial setting time prolongs, the compression strength decreases, and the amount of silica gel decreases clearly.

Info:

Periodical:

Key Engineering Materials (Volumes 467-469)

Edited by:

Dehuai Zeng

Pages:

934-939

DOI:

10.4028/www.scientific.net/KEM.467-469.934

Citation:

G. L. Yu et al., "Effect of Additions on Properties of the Mullite-Based Investment Materials", Key Engineering Materials, Vols. 467-469, pp. 934-939, 2011

Online since:

February 2011

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Price:

$35.00

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