Effect of pre-added cristobalite content on high temperature creep properties of silicon-based ceramic core

ZHAN Hongxing; LU Gang; YAN Qingsong; ZHA Junhui; LUO Ling

doi:10.13801/j.cnki.fhclxb.20200731.001

Volume 38 Issue 5

May 2021

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Article Navigation > Acta Materiae Compositae Sinica > 2021 > 38(5): 1588-1593

ZHAN Hongxing, LU Gang, YAN Qingsong, et al. Effect of pre-added cristobalite content on high temperature creep properties of silicon-based ceramic core[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1588-1593. doi: 10.13801/j.cnki.fhclxb.20200731.001

Citation:

ZHAN Hongxing, LU Gang, YAN Qingsong, et al. Effect of pre-added cristobalite content on high temperature creep properties of silicon-based ceramic core[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1588-1593. doi: 10.13801/j.cnki.fhclxb.20200731.001

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Effect of pre-added cristobalite content on high temperature creep properties of silicon-based ceramic core

doi: 10.13801/j.cnki.fhclxb.20200731.001

National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Aeronautical University, Nanchang 330063, China

Received Date: 2020-06-11
Accepted Date: 2020-07-22

Available Online: 2020-07-31

Publish Date: 2021-05-01

Abstract

Abstract

Cristobalite was added as the second phase and zircon sand as the mineralizer to the silicon-based ceramic core matrix material, and the ceramic core sample was prepared by hot press injection method. The effect of pre-added cristobalite content on the performance of silicon-based ceramic cores was studied, and the mechanism of the influence of pre-added cristobalite content on the high temperature creep of silicon-based ceramic cores at 1550℃ was analyzed. The results show that as the content of pre-added cristobalite increases, the bending strength and high-temperature deflection of the silicon-based ceramic core gradually decrease, and the porosity of the core gradually increases. When the pre-added cristobalite content is 10wt%, the crystallization rate of quartz glass is the fastest, cristobalite begins to form a high-temperature-resistant cristobalite skeleton, the core’s ability to resist high-temperature deformation is significantly improved, the bending strength is 5.13 MPa, the high temperature deflection is 1.18 mm, the porosity is 40.55%, the comprehensive performance of the ceramic core is the best.
- ceramic core,
- cristobalite,
- high temperature deflection,
- high temperature creep,
- porosity
Long Abstrsct
Innovation Points

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References(28)

References

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