摘要
BP neural network was used in this study to model the porosity and the compressive strength of a gradient Al2O3-ZrO2ceramic foam f ilter prepared by centrifugal slip casting.The inf luences of the load applied on the epispastic polystyrene template(F),the centrifugal acceleration(v)and sintering temperature(T)on the porosity(P)and compressive strength(σ)of the sintered products were studied by using the registered three-layer BP model.The accuracy of the model was verif ied by comparing the BP model predicted results with the experimental ones.Results show that the model prediction agrees with the experimental data within a reasonable experimental error,indicating that the three-layer BP network based modeling is effective in predicting both the properties and processing parameters in designing the gradient Al2O3-ZrO2ceramic foam f ilter.The prediction results show that the porosity percentage increases and compressive strength decreases with an increase in the applied load on epispastic polystyrene template.As for the inf luence of sintering temperature,the porosity percentage decreases monotonically with an increase in sintering temperature,yet the compressive strength f irst increases and then decreases slightly in a given temperature range.Furthermore,the porosity percentage changes little but the compressive strength f irst increases and then decreases when the centrifugal acceleration increases.
BP neural network was used in this study to model the porosity and the compressive strength of a gradient Al2Q-ZrO2 ceramic foam filter prepared by centrifugal slip casting. The influences of the load applied on the epispastic polystyrene template (F), the centrifugal acceleration (V) and sintering temperature (T) on the porosity (P) and compressive strength (a) of the sintered products were studied by using the registered three-layer BP model. The accuracy of the model was verified by comparing the BP model predicted results with the experimental ones. Results show that the model prediction agrees with the experimental data within a reasonable experimental error, indicating that the three-layer BP network based modeling is effective in predicting both the properties and processing parameters in designing the gradient Al203-ZrO2 ceramic foam filter. The prediction results show that the porosity percentage increases and compressive strength decreases with an increase in the applied load on epispastic polystyrene template. As for the influence of sintering temperature, the porosity percentage decreases monotonically with an increase in sintering temperature, yet the compressive strength first increases and then decreases slightly in a given temperature range. Furthermore, the porosity percentage changes little but the compressive strength first increases and then decreases when the centrifugal acceleration increases.
基金
financially supported by the Natural Science Foundation of Liaoning Province(No.201102090)
the Doctoral Initiating Project of Liaoning Province Foundation for Natural Sciences,China(No.20111068)
the High School Development Plan for Distinguished Young Scholars of Liaoning Province Education Committee(No.LJQ2012056)
the National High-Tech Research and Development Program of China("863"Program,No.2011AA060102)
关键词
金属材料
有色金属材料
有色轻金属材料
铝材料
gradient Al203-ZrO2 ceramic foams
centrifugal process parameters
BP neural network
porosity
compressive strength