Fabrication of Highly Porous CuAl Intermetallics Bythermal Explosion Using NaCl Space Holders
A high-porosity CuAl-based intermetallic compound with a composition of Cu-50 at.%Al was successfully prepared by thermal explosion(TE)using NaCl space holders.The results showed that the NaCl particles were completely removed from the green compact by water leaching.The temperature of the specimen during the TE and the evolution of the porous microstructure were investigated.The TE was ignited at 560℃,and the specimentemperature increased to 775℃ in 3 s,resulting in the formation of intermetallic CuAl and CuAl2 phases in the final product.A porous CuAl-based intermetallic compound with up to 62 vol.%open porosity was produced by adding 60 vol.%NaCl.The compound exhibited a bimodal pore size structure,including large pores(200–300 μm)that replicated the NaCl particles and small pores(5–10 μm)interspersed in the pore walls.Moreover,the large pores were interconnected by channels and formed an open CuAl-based intermetallic cellular structure,which has great potential in heat exchange and filtration applications.
Porous material Copper aluminides Intermetallic compounds Thermal explosion NaCl space holders
Cai Xiaoping Liu Yanan Wang Xiaohong Jiao Xinyang Wang Jianzhong Feng Peizhong Akhtar Farid
School of Materials Science and Engineering,China University of Mining and Technology,Xuzhou 221116, State Key Laboratory of Porous Metal Materials,Northwest Institute for Non-ferrous Metal Research,Xi Division of Materials Science,Lule(a)University of Technology,Lule(a)97187,Sweden
国际会议
北京
英文
1218-1223
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）