Experimental Studies and Computer Simulation of Permeability Determination of Porous SiC Preforms
Permeability of SiC preform is a key parameter during the pressure infiltration studies of molten metal (Copper and Aluminium alloy) into porous SiC preforms during preparation of SiC particle reinforced metal matrix composites (MMC) with high content of SiC reinforcement.Its characterization could be quite helpful to reveal the defect formation mechanism of the composite productions and further optimize the preparation processes of such composites.The objectives of this study were to assess the pore distribution and determine the permeability of porous SiC preforms.We compared the values of permeability obtained from experimental data, calculation by Carman-Kozeny equation and simulation of micro-models.The results of experiment illustrated that permeability were 0.64 x 10-12 m2 (ε=30%), 1.76 × 10-12 m2 (ε=37%) and 10.20 × 10-12 m2 (ε=44%) respectively, which are quite similar to the value both of calculation and computer simulation.Additionally, results indicate that the permeability substantially affected by porosity and both size and shape of filling particles into SiC preform.
SiC preform Permeability Pressure infiltration Computer simulation
Meng-jian Zhu Shun Li Xun Zhao De-gan Xiong
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan, P.R.China, 410073
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
391-400
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）