Models for hardness and adhesion of coatings
Models for hardness and adhesion of coatings
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DOI：
10.1179/026708499101516821
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发表时间：
1999-12
影响因子：
2.8
通讯作者：
J. Lesage;D. Chicot
中科院分区：
文献类型：
--
作者：
J. Lesage;D. Chicot
压痕测试被广泛使用，因为它们在机械性能方面显然非常容易解释。在涂层的特殊情况下，只要解决一些解释问题，就可以进行压痕测试以确定硬度（即使基材干扰测量）或附着力性能。在本文的第一部分中，表明现有模型对于预测硬度并不能令人满意，而是提出了一种基于压头下塑性变形体积的新模型。本文的第二部分研究了压痕如何能够在涂层和基材之间的界面处产生和传播裂纹，并根据与附着力相关的表观界面韧性来解释所施加的载荷-裂纹关系。
Indentation tests are widely used because they are apparently very simple to interpret in terms of mechanical properties. In the special case of coatings, indentation tests may be performed in order to determine hardness (even when the substrate interferes in the measurement) or adhesion properties, as long as some problems of interpretation are solved. In the first part of the paper, it is shown that existing models are not satisfactory for predicting hardness and instead a new model is presented based on the plastic deformation volumes under the indenter. The second part of the paper examines how the indentation is capable of creating and propagating a crack at the interface between the coating and the substrate, and the applied load–crack relation is interpreted in terms of an apparent interfacial toughness which can be correlated with adhesion.