Refractory castables for titanium metallurgy based on calcium zirconate
Refractory castables for titanium metallurgy based on calcium zirconate
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DOI：
10.1016/j.matdes.2018.03.049
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发表时间：
2018-06
影响因子：
8.4
通讯作者：
S. Schafföner;T. Qin;J. Fruhstorfer;C. Jahn;G. Schmidt;H. Jansen;C. Aneziris
中科院分区：
文献类型：
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作者：
S. Schafföner;T. Qin;J. Fruhstorfer;C. Jahn;G. Schmidt;H. Jansen;C. Aneziris
锆酸钙（CaZrO 3）是一种很有前途的钛合金熔炼用耐火材料。因此，本研究研究了基于CaZrO 3的耐火浇注料，以扩大到更大的熔化坩埚和耐火衬里。本研究首先采用全析因试验设计法对含铝酸钙水泥的耐火浇注料进行工艺优化。分析了决定浇注料实际应用的物理、化学、力学和热机械性能。性能一般是类似的单轴压制的耐火材料的基础上CaZrO 3。然而，基质中含有铝酸钙引起了显着的烧结收缩，从而导致较小的显气孔率和较低的耐火度相比，单轴压制的耐火材料。最后，成功地制造了内容积为900 ml的熔化坩埚。本研究为进一步开发大型CaZrO3耐火材料提供了有效的框架。
Calcium zirconate (CaZrO3) is a promising refractory material to melt titanium alloys. Therefore the present study investigated refractory castables based on CaZrO3to allow an upscaling to larger melting crucibles and refractory linings. The study first included the processing optimization of the refractory castable containing calcium aluminate cement using a full factorial experimental design. Then the physical, chemical, mechanical and thermomechanical properties that determine the practical application of the castable were analyzed. The properties were generally similar to the ones of uniaxially pressed refractories based on CaZrO3. Nevertheless, the matrix containing calcium aluminates caused a pronounced sintering shrinkage leading to a smaller apparent porosity and a lower refractoriness compared to uniaxially pressed refractories. Finally, melting crucibles with an inner volume of 900 ml were successfully manufactured. Thus, this study provides an effective framework for the further development of large CaZrO3refractories.