Effect of Pre-Added Cristobalite Content on the Properties of Silica-Based Ceramic Cores

Shu Xin Niu; Ding Zhong Tang; Xiao Guang Liu; Jian Sheng Yao; Xin Li; Li Li Wang; Guo Hong Gu; Yin Ping Yang; Xiao Wei Yang

doi:10.4028/www.scientific.net/MSF.848.217

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HomeMaterials Science ForumMaterials Science Forum Vol. 848Effect of Pre-Added Cristobalite Content on the...

Effect of Pre-Added Cristobalite Content on the Properties of Silica-Based Ceramic Cores

Abstract:

In this study, cristobalite was used as the addition to prepare silica based ceramic cores, and then the effect of cristobalite content on the mechanical and chemical properties was investigated. The increasing of pre-added cristobalite content resulted in more crystallized cristobalite in the sintered samples and the variation of the linear shrinkage and mechanical properties. When pre-added cristobalite content was 6.0 wt%, the shrinkage of ceramic core was 0.42%, the creep at 1540°C for 30 min was 0.10 mm, and the flexural strength at room temperature and at 1550°C were 25.2 MPa and 28.7 MPa, respectively, which meets the need of ceramic cores of hollow turbine blades.

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Periodical:

Materials Science Forum (Volume 848)

Pages:

217-221

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.848.217

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Online since:

March 2016

Authors:

Shu Xin Niu, Ding Zhong Tang, Xiao Guang Liu, Jian Sheng Yao, Xin Li, Li Li Wang, Guo Hong Gu, Yin Ping Yang, Xiao Wei Yang

Keywords:

Ceramic Core, Cristobalite, Crystallization, Fused Silica, High Temperature Superalloys

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