陶瓷基层状复合材料超塑成形数值模拟与实验研究

为研究陶瓷基层状复合材料的超塑性能,对其超塑拉深成形过程进行了有限元模拟。结果表明,由超塑性能差异较大的不同陶瓷材料构成的层状复合材料的应力应变状态明显优于相应单一陶瓷材料,因此,很有可能具有优异的超塑性。采用流延制膜和热压烧结工艺制备了Al2O3/3Y-TZP层状复合材料,通过高温拉深实验对该材料进行了超塑成形性能研究。实验表明,当采用合适的应变速率和变形温度时,Al2O3/3Y-TZP层状复合材料具有优良的超塑性能,从而证实了有限元模拟的结论。

Numerical Simulation and Experimental Research on Superplasticity of Ceramic Matrix Laminated Composite

In order to investigate the superplasticity of ceramic matrix laminated composite, the superplastic deep-drawing process was simulated by FEM. The results shown that the strain and stress conditions of laminated composite, made by ceramic with different superplastic formability, were better than that of monolithic ceramic. Consequently, the material might had superior superplasticity. Tape casting and hot-press sintering were used to fabricate Al_2O_3/3Y-TZP laminated composite. As-received material was deep-drawing at high temperature to research its superplasticity. The results shown that when suitable strain rate and forming temperature were used, the as-received material had superior superplasticity. This testified the conclusion of FEM simulation.