Pinto Gustavo, Baptista Andresa, Silva Francisco, Porteiro Jacobo, Míguez José, Alexandre Ricardo
ISEP-School of Engineering, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal.
INEGI-Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Rua Dr. Roberto Frias 400, 4200-465 Porto, Portugal.
Materials (Basel). 2021 Feb 1;14(3):668. doi: 10.3390/ma14030668.
Micro-abrasion remains a test configuration hugely used, mainly for thin coatings. Several studies have been carried out investigating the parameters around this configuration. Recently, a new study was launched studying the behavior of different ball materials in abrasive particles' dynamics in the contact area. This study intends to extend that study, investigating new ball materials never used so far in this test configuration. Thus, commercial balls of American Iron and Steel Institute (AISI) 52100 steel, Stainless Steel (SS) (AISI) 304 steel and Polytetrafluoroethylene (PTFE) were used under different test conditions and abrasive particles, using always the same coating for reference. Craters generated on the coated samples' surface and tracks on the balls' surface were carefully observed by Scanning Electron Microscopy (SEM) and 3D microscopy in order to understand the abrasive particles' dynamics. As a softer material, more abrasive particles were entrapped on the PTFE ball's surface, generating grooving wear on the samples. SS AISI 304 balls, being softer than the abrasive particles (diamond), also allowed particle entrapment, originating from grooving wear. AISI 52100 steel balls presented particle dynamics that are already known. Thus, this study extends the knowledge already existing, allowing to better select the ball material to be used in ball-cratering tests.
微磨损仍然是一种广泛使用的测试配置,主要用于薄涂层。已经开展了多项研究来探究围绕这种配置的参数。最近,一项新的研究启动,研究不同球材料在接触区域磨料颗粒动力学中的行为。本研究旨在扩展该研究,探究迄今为止在这种测试配置中从未使用过的新球材料。因此,在不同的测试条件和磨料颗粒下,使用了美国钢铁协会(AISI)52100钢、不锈钢(SS)(AISI)304钢和聚四氟乙烯(PTFE)的商业球,始终使用相同的涂层作为参考。通过扫描电子显微镜(SEM)和3D显微镜仔细观察涂覆样品表面产生的凹坑和球表面的轨迹,以了解磨料颗粒的动力学。作为一种较软的材料,更多的磨料颗粒被困在PTFE球的表面,在样品上产生沟槽磨损。SS AISI 304球比磨料颗粒(金刚石)软,也会导致颗粒被困,产生沟槽磨损。AISI 52100钢球呈现出已知的颗粒动力学。因此,本研究扩展了已有的知识,有助于更好地选择用于球坑试验的球材料。