Fabrication of Porous Aluminum for Lowering Cost and Reducing Environmental Load and Sensing Technology of Its Compressive Abilities

采用搅拌摩擦工艺(FSP)，成功地制备出孔隙率约为50-85%的高质量多孔铝。其次，研究表明，当最大孔隙率截面上的平均压应力达到临界值时，平台应力可近似为名义压应力。此外，还研制了一种可用于多孔铝压缩破坏试验的四个测量平面的薄膜传感器。研制了一种采用振荡器电路的新型传感器测量系统，采用简单的内阻补偿系数，提高了测量精度和输出稳定性。

Using a friction stir processing (FSP) route, high quality porous aluminum with porosity of approximately 50 - 85% were successfully fabricated. Next, it was shown that when the mean compressive stress on a maximum-porosity cross section reaches the critical value, the plateau stress can be evaluated approximately as the nominal compressive stress. Moreover, a thin film sensor with four measurement planes, which can be applied to the compressive failure test of porous aluminum, was fabricated. A new sensor measurement system using oscillator circuit was developed and, the measurement accuracy and output stability was improved by using simple compensation factor forinternal resistance.