Ti-C-Al-Fe2O3体系原位合成钢基复合材料组织与形貌研究 |
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引用本文: | 焦玉凤,黄志求,李海涛.Ti-C-Al-Fe2O3体系原位合成钢基复合材料组织与形貌研究[J].佳木斯工学院学报,2011(3):396-400. |
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作者姓名: | 焦玉凤 黄志求 李海涛 |
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作者单位: | 佳木斯大学材料科学与工程学院,黑龙江佳木斯154007 |
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摘 要: | 采用Ti-C-Al-Fe2O3反应体系,结合铸造和自蔓延高温合成(SHS)两种工艺,在湿砂型中浇注高温熔融的钢水,引燃SHS压块,从而发生自蔓延高温合成反应,生成了高硬度的陶瓷相TiC、Al2O3.通过改变Ti-C-Al-Fe2O3体系组分配比,探讨了体系在金属液内SHS反应对原位内生TiC、Al2O3尺寸与分布的影响.结果表明,随着过量Al元素的增加,陶瓷增强颗粒尺寸逐渐减小且分布更均匀;稀土CeO2加入量的增加,增强区更加致密,稀土CeO2添加剂含量为0.8%时制备的复合材料中原位形成的Al2O3、TiC颗粒尺寸较小,分布均匀.
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关 键 词: | SHS 钢基复合材料 组织形貌 CeO2 |
Study on Structure and Properties of Steel Matrix Composites in Situ by Ti-C-Al-Fe2O3 System |
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Authors: | JIAO Yu-feng HUANG Zhi-qiou LI Hai-tao |
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Affiliation: | (Institute of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China) |
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Abstract: | The material system,Ti-C-Al-Fe2O3,was selected in this paper to prepare a steel casting with a layer of ceramic reinforced surface by a casting process combined with SHS.During the process,high temperature molten steel was poured into a sand mould where a preformed SHS block was preset and ignited by the high temperature molten steel.As a result,a SHS reaction happened and ceramic reinforcements TiC and Al2O3 were synthesized inside the mould.The influence of TiC and Al2O3 on the size and distribution in the Ti-C-Al-Fe2O3 system inside the SHS reaction situ in the liquid metal was studied.With the excessive Al element increasing,ceramic particle size decreased gradually and distributed more evenly.With the total mass of CeO2 addition increasing from 0wt% to 1.2wt%,the density in the reinforced region increased.When the CeO2 additive content is 0.8% of the composite materials prepared by in situ formation of Al2O3 and TiC,the particles were the finest and distributed evenly. |
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Keywords: | self-propagation high-temperature synthesis steel matrix composites structure and properties CeO2 |
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