中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 6 June 2023 |
（1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2. Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China;
3. CSSC No.12 Research Institute, Xingping 713102, China）
Abstract:Ultrasound assisted casting method was applied to preparing B4Cp/Al composites with the addition of B element by adding KBF4 into Al-B4C-K2TiF6 system. The effects of B element addition on the microstructure and mechanical properties as well as the reaction mechanism at the interface of composites were investigated. Experimental results showed that B element addition altered the B4Cp/Al interface, induced more small-sized TiB2 particles to distribute within the matrix. Therefore, cavitation and acoustic flow effects of the melt were intensified, which led to the breaking of B4C clusters and finally led to the homogeneous microstructure and better mechanical properties of the composites.
Key words: B element; B4Cp/Al composite; microstructure; mechanical properties; interface reaction; ultrasound; casting method
