Evolution of microstructure and mechanical properties of Al-B4C composite after recycling

3rd International Conference on Manufacturing, Material and Metallurgical Engineering

机械制造;材料科学;冶金学

Guo, Zhenjiang^1,2 ; Li, Qiulin^1 ; Liu, Wei^2 ; Shu, Guogang^3

Graduate School at Shenzhen, Tsinghua University, Shenzhen

518055, China^1

School of Materials Science and Engineering, Tsinghua University, Beijing

100084, China^2

State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co. Ltd., Shenzhen, Guangdong Prov.

518172, China^3

关键词: Al-B4C composite;    Broken down;    Interface reactions;    Microstructure and mechanical properties;    Particle clusters;    Protection layers;    Scanning electronic microscopes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/409/1/012005/pdf
DOI  :  10.1088/1757-899X/409/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A remelting method was used to recycle Al-15wt.% B4C composite and the microstructure and mechanical properties of the composite were investigated before and after recycling. Scanning electronic microscope (SEM) showed that some of the particle clusters present in the original composite were broken down and the distribution of B4C in the matrix was more uniform after recycling. The interface reaction was further intensified and the protection layer coated on the surface of B4C was thicker after recycling. In addition, there were more TiB2 particles which peeled off from the surface of B4C and distributed around B4C. Al3Ti phase, which was present in the original composite, disappeared after recycling, while Al3BC phase increased markedly. Tensile test and hardness test revealed that the mechanical properties were preserved well after recycling. Therefore, it is proposed that remelting method is a feasible method for Al-B4C composite recycling.