08 利用白云鄂博铁精矿-铝土矿制备Fe-Al_2O_3复合材料的研究

陈宇昕;安胜利;

• 1:内蒙古科技大学材料与冶金学院

• 2:内蒙古科技大学内蒙古自治区先进陶瓷材料与器件重点实验室

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摘要(Abstract)：

以白云鄂博铁精矿和铝土矿为主要原料,以活性炭为还原剂,采用无压烧结法制备了Fe-Al_2O_3复合材料.研究了不同烧结温度以及不同铝土矿添加量对相组成、微观结构、力学性能和耐腐蚀性的影响.结果表明:烧结温度以1 380℃为最佳,并发现铝土矿的添加量有利于材料力学性能的提升.其主要原因为铝土矿中含有TiO_2,CaO,MgO等成分,在高温下形成液相,可以有效地促进复合材料的烧结.另外,液相也造成金属相周围热容不同,导致过冷度发生变化,进而影响金属相位错密度,低位错密度可以提高合金相的塑性变形能力.表明矿物中的杂质氧化物并不会影响复合材料的最终力学性能,反而具有一定的积极作用,为白云鄂博矿物的综合利用提供新的途径.

关键词(KeyWords)： 白云鄂博铁精矿;铝土矿;复合材料;碳热还原

基金项目(Foundation): 国家自然科学基金资助项目(51974167)

作者(Author): 陈宇昕;安胜利;

Email:

DOI: 10.16559/j.cnki.2095-2295.2021.01.008

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