Enhancement and explosion-proof mechanism of aluminum fiber addition in Al2O3-SiC-C castables for iron runner
Enhancement and explosion-proof mechanism of aluminum fiber addition in Al2O3-SiC-C castables for iron runner
复制标题
铁浇道用Al2O3-SiC-C浇注料中添加铝纤维的增强及防爆机理
DOI：
10.1016/j.ceramint.2019.07.310
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发表时间：
2019
影响因子：
5.2
通讯作者：
Guo Yindong
中科院分区：
文献类型：
--
作者：
Li Yichong;Zhao Huizhong;Zhang Han;Pan Dunxiang;Feng Yunkang;Li Yuangao;Wang Xinquan;Guo Yindong
由于在浇注料的烘烤过程中通常排出一定量的水，浇注料的爆炸仍然是一个问题。浇注料的防爆性能和机械强度越来越受到人们的关注。本文建立了致密氧化铝-金属铝复合层的形成模型，提出了添加铝纤维的防爆机理。研究了加入0.5%、1%、2%和3%（质量分数）铝纤维对Al 2 O3-SiC-C（ASC）基铁沟浇注料力学强度和抗爆裂性能的影响。结果表明，金属铝纤维的加入能有效提高ASC浇注料的抗爆裂性、体积稳定性和力学强度。当铝纤维的质量分数为0.10- 0.20%时，浇注料具有较好的强度。致密氧化铝层和细小排气通道的封闭气孔缓解了浇注料的应力，提高了浇注料的机械强度。当铝纤维含量超过0.20wt%时，浇注料的强度下降，因为形成了互连的孔隙。当添加0.20wt%的铝纤维时，通过形成具有致密氧化铝层的孔，样品显示出最佳的综合性能。
As a certain amount of water is typically discharged during the baking of castables, explosion of castables remains an issue. The explosion-proof performance and mechanical strength of castables are attracting increasing attention. In this study, the formation model of dense alumina-metal aluminum composite layer was established and an explosion-proof mechanism of aluminum fiber addition was proposed in this paper. The effect of aluminum fiber addition (0.5, 1, 2, and 3 wt%) on mechanical strength and burst resistance of Al2O3–SiC–C (ASC)-based castables for iron runner was studied. The results showed that the addition of metal aluminum fiber could effectively improve burst resistance, volume stability and mechanical strength of ASC castables. The castables had better strength when 0.10–0.20 wt% aluminum fiber was added. Closed pores with dense alumina layers and tiny exhaust channels relieved the stress, improving the mechanical strength of the castables. When the aluminum fiber content exceeded 0.20 wt%, the strength of the castables decreased because of the formation of interconnected pores. When 0.20 wt% aluminum fiber was added, the sample showed the best overall performance by forming pores with a dense layer of alumina.