【摘 要】
:
The combined microarc oxidation (MAO) and magnetron sputtering deposition process was used to deposit duplex a-C:H/MAO and Ti-a-C:H/MAO coatings on AM80 magnesium alloy. The microstructure, mechanical properties and tribological behavior of the two duplex
【机 构】
:
School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710032,
【出 处】
:
武汉理工大学学报(材料科学版)(英文版)
论文部分内容阅读
The combined microarc oxidation (MAO) and magnetron sputtering deposition process was used to deposit duplex a-C:H/MAO and Ti-a-C:H/MAO coatings on AM80 magnesium alloy. The microstructure, mechanical properties and tribological behavior of the two duplex coatings were investigated. The experimental results showed that the a-C:H and Ti-a-C:H top iflms on Si substrates were dense and had a low G peak position and ID/IG ratio, compared with the hydrogen-free amorphous carbon iflms. Numerous micropores were found on the duplex a-C:H/MAO and Ti-a-C:H/MAO coatings together with low values of hardness (H) and elastic modulus (E), which also showed good binding strength with the Mg alloy substrates. Compared to MAO treated substrate used for the protection of the Mg alloy, the duplex a-C:H/MAO and Ti-a-C:H/MAO coatings still had stable and low value of friction coefifcient, even though the surface of the duplex coatings was rough and porous. Furthermore, the mechanism of friction reduction of the two duplex coatings on the Mg alloy substrates was discussed.
其他文献
In polymer modified cementitious materials, it is hard to set up a chemical connection between the added polymer and the cement moiety. In this study FS (functional silane) was adopted to form this connection as a bridge component which has the functional
Analysis ofχ phase precipitation in 2205 duplex stainless steel aged at 700 and 750? has been investigated systematically. The experimental results showed thatχ phase forms prior to the precipitation ofσ phase and disappears onceσ phase starts to precipit
The novel laminated Ti-TiBw/Ti composites composed of pure Ti layers and TiBw/Ti composite layers have been successfully fabricated by reactive hot pressing. Herein, two-scale structures formed: the pure Ti layer and TiBw/Ti composite layer together const
The phosphated and cerium nitrate post-sealed galvanized steel was ifrstly scratched to expose zinc layer and then placed in neutral salt spray (NSS) chamber for different durations. The microstructure and compositions of the scratches were investigated u
The correlation between the microhardness and microstructure features of anodic films on 2024 aluminum alloy formed in the mixed sulfuric acid/oxalic acid electrolyte was studied using micro-hardness tester and scanning electron microscope (SEM). The resu
Recent achievements in concrete hydration exothermic models based on Arrhenius equation have improved computation accuracy for mass concrete temperature field. But the properties of the activation energy and the gas constant (Ea/R) have not been well stud