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Influence of zircon on cristobalite crystallization of silica-based ceramic cores
Liang, Jing-Jing1; Lin, Quan-hong1; Zhang, Xuan1; Jin, Tao1; Sun, Xiao-feng1; Choi, Baig-gyu2; Kim, In-soo2; Do, Jeonghyun2; Jo, Chang-yong2
Corresponding AuthorLiang, Jing-Jing(jjliang@imr.ac.cn)
2016-08-01
Source PublicationJOURNAL OF CERAMIC PROCESSING RESEARCH
ISSN1229-9162
Volume17Issue:8Pages:845-850
AbstractZircon is usually used as a main additive to silica-based ceramic core materials in precise investment casting in order to improve their high temperature properties. But there is still a disagreement in its effect on crystallization behavior of fused silica. In this study, cristobalite crystallization of fused silica in three silica-based core materials containing 10, 30 and 50 wt% zircon respectively were investigated through X-ray diffraction (XRD) and scanning electron microscopy equipped with energy dispersive spectrometer (SEM/EDS). Results showed that zircon addition had neglected effect on cristobalite crystallization during sintering at 1180 degrees C, 1200 degrees C, and 1220 degrees C, but could decrease crystallization during simulated casting process at 1500 degrees C. It was suggested that diffusion of zirconium atoms played a crucial role in this suppressing behavior of zircon on the cristobalite crystallization. During cooling from 1500 degrees C, cristobalite transformation from beta to alpha caused microcracks in these samples that containing 10% or 30% zircon. But when zircon content increased to 50%, crack was prevented. Less phase transformation of fused silica -> cristobalite and enhanced strength by zircon was supposed to be the reason that was responsible for prevented cracks.
KeywordSilica-based ceramic cores Zircon Cristobalite transformation
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000389841000011
PublisherKOREAN ASSOC CRYSTAL GROWTH, INC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123326
Collection中国科学院金属研究所
Corresponding AuthorLiang, Jing-Jing
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Korea Inst Mat Sci, Chang Won 642831, South Korea
Recommended Citation
GB/T 7714
Liang, Jing-Jing,Lin, Quan-hong,Zhang, Xuan,et al. Influence of zircon on cristobalite crystallization of silica-based ceramic cores[J]. JOURNAL OF CERAMIC PROCESSING RESEARCH,2016,17(8):845-850.
APA Liang, Jing-Jing.,Lin, Quan-hong.,Zhang, Xuan.,Jin, Tao.,Sun, Xiao-feng.,...&Jo, Chang-yong.(2016).Influence of zircon on cristobalite crystallization of silica-based ceramic cores.JOURNAL OF CERAMIC PROCESSING RESEARCH,17(8),845-850.
MLA Liang, Jing-Jing,et al."Influence of zircon on cristobalite crystallization of silica-based ceramic cores".JOURNAL OF CERAMIC PROCESSING RESEARCH 17.8(2016):845-850.
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