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阮晴,贾玉振,郑继云,李丘林,刘伟,束国刚.Ti 元素对B4C/Al复合材料力学性能的改善作用研究[J].稀有金属材料与工程(英文),2019,48(6):1777~1784.[ruanqing,jiayuzhen,zhengjiyun,liqiulin,liuwei and shuguogang.Improvement on mechanical property of B4C/Al composites by addition of Ti through interfacial reaction[J].Rare Metal Materials and Engineering,2019,48(6):1777~1784.]
Improvement on mechanical property of B4C/Al composites by addition of Ti through interfacial reaction
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Received:January 19, 2018  Revised:March 17, 2018
Key words: B4C/Al composites  Ti  Interfacial reaction  Mechanical property
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ruanqing,jiayuzhen,zhengjiyun,liqiulin,liuwei and shuguogang  
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      A fine bonded interface is essential for the property of metal matrix composites. In this paper, an innovative method to strengthen boron carbide reinforced aluminum composites (B4C/Al composites) was studied by liquid stirring technology. The effect of interfacial reaction on the microstructure and mechanical behavior of B4C/Al composites was revealed by addition of Ti. Through B4C-Al melt interfacial reaction, Ti element strongly enriched at the interface. A dense and continuous nanoscale layer of TiB2 was formed on the surface of B4C particles. Interfacial modification was achieved by interfacial reaction. Due to the formation of TiB2 layer with good wettability and bonding, interfacial defects were eliminated. Increasing the degree of reaction, such as Ti content and reaction time, the strength of B4C/Al composites was gradually improved. Severe interfacial reaction introduced lots of nano-scale TiB2crystals into the matrix, which as in situ second reinforcement also improved the strength of B4C/Al composites. Fracture behavior of B4C/Al composites with different interfacial modification was discussed at last.