Influence of zircon on cristobalite crystallization of silica-based ceramic cores

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	Influence of zircon on cristobalite crystallization of silica-based ceramic cores
	Liang, Jing-Jing 1; Lin, Quan-hong 1; Zhang, Xuan 1; Jin, Tao 1; Sun, Xiao-feng 1; Choi, Baig-gyu 2; Kim, In-soo 2; Do, Jeonghyun 2; Jo, Chang-yong 2
刊名	JOURNAL OF CERAMIC PROCESSING RESEARCH
	2016-08-01
卷号	17 期号:8 页码:845-850
关键词	Silica-based ceramic cores Zircon Cristobalite transformation
ISSN号	1229-9162
通讯作者	Liang, Jing-Jing(jjliang@imr.ac.cn)
英文摘要	Zircon 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.
WOS研究方向	Materials Science
语种	英语
出版者	KOREAN ASSOC CRYSTAL GROWTH, INC
WOS记录号	WOS:000389841000011
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/123325]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liang, Jing-Jing
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Korea Inst Mat Sci, Chang Won 642831, South Korea
推荐引用方式 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.