A New Phosphate-Bonded Investment Material for Rapid Ceramic Molding of Medium-Size Castings

Abstract:

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Phosphate-bonded investment(PBI)ceramic mold materials have outstanding properties, such as rapid setting rate , moderate green strength and high temperature strength, and could be widely utilized in dental restoration and micro-casting of artistic products. However, fast hydration and gel rate of the phosphate-bonded ceramic slurry has been an obstacle to the wide applications of ceramic mold material for medium and large-size precision castings. This paper presents a new phosphate-bonded ceramic mold material by modifying the composition of refractory aggregates and additive agents, which is promising to be used for rapid ceramic mold casting for medium-size super alloy components. The results indicate that the properties of ceramic mold slurry including initial setting time and fluidity are suitable for complete embedding medium-scale patterns and get accurate duplicate of external configurations when the amount of boric acid is 1.11wt% and sodium tri-poly phosphate (STP) is 0.92wt%. The strength of ceramic mold material can resist impact force when pouring molten metal and easy take casting out from ceramic mold.

Info:

Periodical:

Advanced Materials Research (Volumes 79-82)

Edited by:

Yansheng Yin and Xin Wang

Pages:

1715-1718

DOI:

10.4028/www.scientific.net/AMR.79-82.1715

Citation:

T. Z. Li et al., "A New Phosphate-Bonded Investment Material for Rapid Ceramic Molding of Medium-Size Castings", Advanced Materials Research, Vols. 79-82, pp. 1715-1718, 2009

Online since:

August 2009

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Price:

$35.00

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