| 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 | |
| 通讯作者 | Liang, Jing-Jing(jjliang@imr.ac.cn) |
| 2016-08-01 | |
| 发表期刊 | JOURNAL OF CERAMIC PROCESSING RESEARCH
 |
| ISSN | 1229-9162 |
| 卷号 | 17期号:8页码:845-850 |
| 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. |
| 关键词 | Silica-based ceramic cores Zircon Cristobalite transformation |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Materials Science |
| WOS类目 | Materials Science, Ceramics |
| WOS记录号 | WOS:000389841000011 |
| 出版者 | KOREAN ASSOC CRYSTAL GROWTH, INC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/123326 |
| 专题 | 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. |
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