Thermal spraying — Classification method of adhesive strength by indentation
热喷涂 - 通过压痕的粘合强度的分类方法
发布日期:
2016-09-19
ISO 19207:2016规定了使用维氏硬度试验机在室温下对热喷涂涂层粘合强度的分类方法。它根据无可见裂纹的最大压痕力对粘合强度进行分类,称为粘合指数,适用于相对致密的金属涂层、陶瓷涂层和金属陶瓷涂层。可在每个涂层系统内进行比较。
压痕法不建议用于非常薄和非常多孔的涂层,也不建议用于粘合强度低于粘合强度的涂层系统。建议该试验方法适用于孔隙率小于约15%的涂层。
ISO 19207:2016 specifies the classification method of adhesive strength for thermal spray coatings at room temperature by using Vickers hardness testing machine. It classifies the adhesive strength, called adhesion index, evaluated from the maximum indentation force without visible cracking, and it is applicable for relative dense metal coatings, ceramic coatings and cermet coatings. It can be used within comparison within each coating system.
The indentation method is not recommended for very thin and very porous coatings and also for the coating system with lower cohesion strength than adhesion strength. It is recommended that this test method can be applied for a coating of which porosity is less than approximately 15 %.