【摘要】 本文通过鼓膜实验,利用双光束电子散斑干涉技术(ESPI)和时间序列的散斑干涉法,首先对纯铝试样鼓膜变形进行测量,并结合薄板小挠度理论计算了纯铝的弹性模量,结果与弹性模量的参考值基本相同,表明该测量变形的方法精确可行。在此基础上对二步阳极氧化法制备的氧化铝多孔膜试样的鼓膜变形进行了检测,变形检测结果为进一步研究氧化铝多孔膜的力学性能及其与微观结构的关系提供了依据和基础。更多还原

【Abstract】 The dimensions of the porous alumina membranes studied are 10 mm in diameter, 75 μm in thickness and the array of perforation holes are regular hexagons with 50 nm in diameter. Their fine structure and chemical,mechanical and thermal stability make it very useful as a filter to separate the small grains from mixed liquid. Unfortunately,the significant macro-mechanical properties of porous alumina thin membrane are reported scarcely and have to be investigated for reliable application. Firstly, the porous sample was fabricated and its dimensions and microstructure were characterized. Then the bugling deformation and the Young modulus of the pure aluminum sample were measured by time sequence speckle pattern interferometry with high precision and the results are great agreement with the given material reference parameters. Lastly, the temporal speckle pattern interferometry was used to investigate successfully the large deflection of Porous alumina membranes loaded by perpendicularly uniform pressure. The bugling deflection of the porous alumina membrane sample was acquired. The results lay a good foundation for further study on the mechanical properties of porous alumina membrane and their relation with microstructure.更多还原