Porous CuAlMn Shape-Memory Alloys with Controlling Porosity and Pores’ Structural Parameter Produced by Sintering-Evaporation Process
The porous Cu-11.9Al-2.5Mn (wt %) shape memory alloys with open-cell structure were successfully prepared by Sintering-evaporation Process method. A mixture powders with CuAlMn and NaCl powder were hot pressed at 780°C for 3hrs in the hot-pressing equipment with dynamic vacuum of 0.001Pa, and then pressure force was unloaded and the sintering temperature was heated up to 990°C, the NaCl was melted and evaporated completely at 990°C for 24hrs. The shape and size of the pores among the porous CuAlMn shape memory alloys are almost the same as those of NaCl powders, the pores are interconnected. The microstructure, mechanical property and phase transformation behavior of the sample have been studied. The results show that the porous CuAlMn SMAs with controlling porosity and pores’ structural parameters can be prepared by Sintering-evaporation Process, and their phase transformation behaviors are similar to that of conventional bulk Cu-11.9Al-2.5Mn (wt %) shape memory alloys.
Joong Hee Lee
S. Gong et al., "Porous CuAlMn Shape-Memory Alloys with Controlling Porosity and Pores’ Structural Parameter Produced by Sintering-Evaporation Process", Advanced Materials Research, Vols. 123-125, pp. 1011-1014, 2010