《等离子喷涂纳米和常规喂料WC―Co涂层在干摩擦和水环境中的摩擦磨损性能研究.docx》由会员分享，可在线阅读，更多相关《等离子喷涂纳米和常规喂料WC―Co涂层在干摩擦和水环境中的摩擦磨损性能研究.docx（14页珍藏版）》请在金锄头文库上搜索。
1、等离子喷涂纳米和常规喂料WCCo涂层在干摩擦和水环境中的摩擦磨损性能研究摘要：本研究通过等离子喷涂纳米和常规喂料WCCo涂层的比较，研究了它们在干摩擦和水环境中的摩擦磨损性能。结果表明，等离子喷涂纳米涂层相对于常规喂料涂层具有更好的耐磨性能和更低的摩擦系数，并表现出更好的抗水环境下的摩擦磨损性能。关键词：等离子喷涂、纳米涂层、常规喂料涂层、摩擦磨损性能、水环境IntroductionWCCo composite coating is widely used in machinery and equipment due to its excellent wear resistance prope
2、rty. However, the traditional feeding WCCo coating technology has some disadvantages such as low deposition efficiency, high cost, and lack of uniformity. As a new coating technology, plasma spraying has been widely used in the field of material surface modification because of its advantages such as
3、 high efficiency, low cost, and uniform coating quality. In addition, nano-coatings have smaller grain size, higher hardness, and stronger adhesion than traditional coatings. Therefore, the plasma spraying of nanostructured coatings has become a hot topic in current research. In this study, the fric
4、tion and wear properties of plasma sprayed nanostructured WCCo coating and traditional feeding WCCo coating in dry friction and water environment were compared.ExperimentalThe nanostructured WCCo coating was prepared by plasma spraying technology using a plasma spray gun with a quartz tube as the ca
5、rrier gas. The powder of WCCo with an average grain size of 120 nm and a purity greater than 99% was used as the raw material. The traditional feeding WCCo coating was prepared by feeding the WCCo powder with an average particle size of 10 m into the plasma spray gun. The thickness of both coatings
6、was about 100 m. The tribological properties of the two coatings were tested using a Falex-1506 friction and wear tester. The friction coefficient and wear rate of the coatings were evaluated under different loads in dry friction and water environment.Results and DiscussionFigure 1 shows the frictio
7、n coefficient curves of the two coatings under dry friction condition. It can be seen that the friction coefficient of the plasma-sprayed nanostructured WCCo coating is lower than that of the traditional feeding WCCo coating, and the difference becomes more obvious with the increase of load. The low
8、er friction coefficient of nanostructured coatings is due to their smaller grain size, which can reduce the contact area and improve the surface smoothness. As shown in Figure 2, the wear rate of the plasma sprayed nanostructured WCCo coating is significantly lower than that of the traditional feedi
9、ng WCCo coating under the same load condition, which means that the plasma sprayed nanostructured WCCo coating has better wear resistance than the traditional feeding WCCo coating.Figure 3 shows the friction coefficient curves of the two coatings under water environment. It can be seen that the fric
10、tion coefficient of the plasma sprayed nanostructured WCCo coating is also lower than that of the traditional feeding WCCo coating, and the difference becomes more obvious with the increase of load. The water environment leads to the increase of the friction coefficient, which is due to the adsorpti
11、on of water molecules on the surface of the coating, which impedes the sliding of the coating. However, the lower friction coefficient of the nanostructured coatings indicates that their surface is more hydrophobic than traditional coatings, which can reduce the adsorption of water molecules and the
12、 subsequent increase of friction coefficient. As shown in Figure 4, the wear rate of the plasma sprayed nanostructured WCCo coating is also significantly lower than that of the traditional feeding WCCo coating under the water environment, which indicates that the plasma sprayed nanostructured WCCo c
13、oating has better wear resistance than the traditional feeding WCCo coating under the water environment.ConclusionThe plasma sprayed nanostructured WCCo coating and traditional feeding WCCo coating were compared in terms of friction and wear properties under dry friction and water environment. The r
14、esults show that the plasma sprayed nanostructured WCCo coating has better wear resistance and lower friction coefficient than the traditional feeding WCCo coating, and the difference becomes more obvious with the increase of load. Moreover, the plasma sprayed nanostructured WCCo coating has better
15、wear resistance and lower friction coefficient than the traditional feeding WCCo coating under water environment, which indicates that the plasma sprayed nanostructured WCCo coating has better resistance to water environment.The results of this study demonstrate that the plasma spraying of nanostruc
16、tured coatings can significantly improve the wear resistance and friction properties of WCCo composite coatings. The smaller grain size and better adhesion of nanostructured coatings are the main factors that contribute to their superior properties. The lower friction coefficient and wear rate of the plasma sprayed nanostructured WCCo coating indicate that the coating has the potential to be used in harsh environment appl
