期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 33, 期 15-16, 页码 3397-3402出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2013.06.025
关键词
In situ cristobalite; Crystallization; Leachability; Fused silica; Ceramic core
资金
- MAPNA turbine Blade Eng. & Mfg. Co. (PARTO)
- Research and Development Department of MAPNA and PARTO
In this work, cristobalite crystallization and its effects on mechanical and chemical behaviour of injection moulded silica-based ceramic cores were investigated. In order to simulate casting process condition, the sintered samples at 1220 degrees C were also heated up to 1430 degrees C. Flexural strength test was carried out on both sintered and heat treated samples. Chemical resistance of the cores was evaluated by leaching the samples inside 43 wt% KOH solution at its boiling point. Phase evolution and microstructure were investigated by thermal analyses (DTA and DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical microscopy (OM). Results showed that cristobalite was crystallized on the surface of fused silica grains at about 1380 degrees C. Flexural strength of the sintered cores was decreased after simulated casting heat treatment due to cristobalite phase transformation. The formed cristobalite on the surface of fused silica grains dramatically decreased the leachability of ceramic cores. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据