BS EN ISO 14577-4:2016规定了一种测试涂层的方法，该方法特别适用于测试 在纳米/微米范围内适用于薄涂层。然而，这一部分的应用 如果压痕深度是涂层厚度的一小部分 在任何可能的情况下，都可以忽略基底的影响，并且可以将涂层视为整体 布料给出了此类情况的限制。本试验方法仅限于在进行压痕时检查单层 垂直于试件表面，但也可以在横截面上测量梯度涂层和多层涂层 如果单个层或梯度的厚度大于 压痕过程。试验方法不限于任何特定类型的材料。金属和非金属涂层 包括在ISO 14577本部分的范围内。 在ISO 14577的本部分中，术语“涂层”用于指 任何与所连接基板性质不同的均质固体层。这个 该方法假设涂层性能随压痕深度而变化。复合涂层 如果结构尺寸小于压痕尺寸，则视为均质。ISO 14577本部分关于压痕硬度测量的应用仅限于 如果压头是一个棱锥或圆锥体，其尖端曲率半径足够小，可以进行塑性加工 涂层内部会发生变形。粘弹性材料或表现出 显著蠕变将受到进行试验所需时间的强烈影响。注1 ISO 14577-1、ISO 14577-2和ISO 14577-3定义了散装材料的仪器化压痕试验的使用 所有力和位移范围内的材料。注2:此处使用的分析不考虑桩的影响- 缩进的向上或向下的缩进。原子弹的使用 使用力显微镜（AFM）评估凹痕形状，可以确定凹痕可能堆积或下沉 凹痕周围的表面。这些表面效应导致低估（堆积）或高估（下沉） 分析中的接触面积，因此可能会影响测量结果。堆积通常发生在完全 加工硬化材料。由于约束条件，较薄的涂层更容易堆积柔软的韧性材料 涂层塑性变形区的应力。据报道，堆积的材料 结果有效增加了硬度测定的接触面积，但影响较小 用于测定压痕模量，因为堆积材料的行为不那么严格。交叉引用:ISO 14577-1:2015ISO 14577-2:2015ISO/IEC指南98-3ISO/IEC 17025ISO 1514ISO 4287ISO 2808ISO 3270ISO 14577- 3购买本文件时提供的所有现行修订均包含在购买本文件中。

BS EN ISO 14577-4:2016 specifies a method for testing coatings which is particularly suitable for testing in the nano/micro range applicable to thin coatings. However, the application of this method of this part of ISO 14577 is not needed if the indentation depth is such a small fraction of the coating thickness that in any possible case a substrate influence can be neglected and the coating can be considered as a bulk material. Limits for such cases are given.This test method is limited to the examination of single layers when the indentation is carried out normal to the test piece surface, but graded and multilayer coatings can also be measured in crosssection if the thickness of the individual layers or gradations is greater than the spatial resolution of the indentation process.The test method is not limited to any particular type of material. Metallic and non-metallic coatings are included in the scope of this part of ISO 14577. In this part of ISO 14577, the term coating is used to refer to any solid layer with homogeneous properties different to that of a substrate it is connected to. The method assumes that coating properties are constant with indentation depth. Composite coatings are considered to be homogenous if the structure size is less than the indentation size.The application of this part of ISO 14577 regarding measurement of indentation hardness is only possible if the indenter is a pyramid or a cone with a radius of tip curvature small enough for plastic deformation to occur within the coating. The hardness of visco-elastic materials or materials exhibiting significant creep will be strongly affected by the time taken to perform the test.NOTE 1 ISO 14577-1, ISO 14577-2 and ISO 14577-3 define usage of instrumented indentation testing of bulk materials over all force and displacement ranges.NOTE 2 The analysis used here does not make any allowances for pile-up or sink-in of indents. Use of Atomic Force Microscopy (AFM) to assess the indent shape allows the determination of possible pile-up or sink-in of the surface around the indent. These surface effects result in an under-estimate (pile-up) or over-estimate (sink-in) of the contact area in the analysis and hence may influence the measured results. Pile-up generally occurs for fully work-hardened materials. Pile-up of soft, ductile materials is more likely for thinner coatings due to the constraint of the stresses in the zone of plastic deformation in the coating. It has been reported that the piled up material results in an effective increase of the contact area for the determination of hardness, while the effect is less pronounced for the determination of indentation modulus, since the piled up material behaves less rigidly.Cross References:ISO 14577-1:2015ISO 14577-2:2015ISO/IEC Guide 98-3ISO/IEC 17025ISO 1514ISO 4287ISO 2808ISO 3270ISO 14577-3All current amendments available at time of purchase are included with the purchase of this document.