This work describes a method to reliably measure the elastic modulus of brittle materials from Berkovich indents under the continuous stiffness mode. It involves depositing a metallic film at the surface of the tested material to absorb the inelastic damage caused by the penetrating indenter. The Zhou-Prorok model was employed and rearranged to decouple the film and substrate contributions. This converted it into a hyperbolic form that approached an asymptote as the indenter approaches the film/substrate interface. This asymptote was described by a simple linear approximation whose slope directly revealed the substrate’s elastic modulus. The method enabled the elastic behavior of the brittle ceramic to be assessed without the indenter penetrating it. In fact, this method can assess properties of an unknown film/substrate composite as long as one has an estimate of the film thickness and the film can appreciably plastically deform.

这项工作描述了一种在连续刚度模式下可靠地测量来自Berkovich压痕的脆性材料的弹性模量的方法。它涉及在被测材料的表面沉积一层金属膜，以吸收由穿透压头引起的非弹性损伤。采用Zhou-Prorok模型并对其进行了重新排列，以使薄膜和基材的作用解耦。这将其转换为双曲形式，当压头接近膜/基底界面时，其接近渐近线。该渐近线通过简单的线性近似来描述，其斜率直接显示了基材的弹性模量。该方法使得能够在压头不穿透的情况下评估脆性陶瓷的弹性性能。实际上，