基体对冷喷涂（CrC-25（Ni20Cr））-（Ni-石墨）金属陶瓷涂层微观结构和摩擦学性能的影响

The Effect of the Substrate on the Microstructure and Tribological Properties of Cold Sprayed (CrC-25(Ni20Cr))-(Ni-graphite) Cermet Coatings.

作者信息

Trelka Anna, Żórawski Wojciech, Maj Łukasz, Petrzak Paweł, Soboń Dominika, Góral Anna

机构信息

Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 30-059 Krakow, Poland.

Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, 25-314 Kielce, Poland.

出版信息

Materials (Basel). 2022 Jan 27;15(3):994. doi: 10.3390/ma15030994.

DOI:10.3390/ma15030994

PMID:35160936

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8839954/

Abstract

In this work, the effect of the substrate, Al 7075 alloy and 1H18NT9 stainless steel, on the microstructure and tribological properties of cold sprayed (CrC-25(Ni20Cr))-(Ni-graphite) coatings was investigated. Both coatings were dense and did not reveal any discontinuities at the interfaces. They had similar CrC and graphite contents. Their microstructures showed a variety of grain sizes of the matrix phase between the inner part of the splat, showing large ones, and their boundaries, where elongated and nanostructured grains were formed during the deposition process. The coating deposited on the steel substrate revealed a slightly higher hardness and lower abrasive wear with the AlO loose abrasive particles. The force required to destroy the durability of the coating-steel substrate system in the three-point bending test was higher than those of the other ones. The cermet deposit cold sprayed on steel and examined at 25 °C under 10 N revealed the best wear resistance and the lowest friction coefficient.

摘要

在本研究中，研究了基体（Al 7075合金和1H18NT9不锈钢）对冷喷涂（CrC-25（Ni20Cr））-（Ni-石墨）涂层微观结构和摩擦学性能的影响。两种涂层均致密，界面处未发现任何间断。它们具有相似的CrC和石墨含量。其微观结构显示，在扁平颗粒内部较大尺寸的基体相晶粒与沉积过程中形成细长和纳米结构晶粒的边界之间，存在多种晶粒尺寸。沉积在钢基体上的涂层显示出略高的硬度，并且在AlO松散磨粒作用下具有较低的磨料磨损。在三点弯曲试验中破坏涂层-钢基体系统耐久性所需的力高于其他系统。在25℃、10N条件下对喷涂在钢上的金属陶瓷沉积物进行检测，结果显示其具有最佳的耐磨性和最低的摩擦系数。