Microstructure and Sliding Wear Resistance of Plasma Sprayed Al2O3-Cr2O3-TiO2 Ternary Coatings from Blends of Single Oxides
Source abstract
Abstract
Al2O3, Cr2O3, and TiO2 are most commonly used oxide materials for thermal spray coating solutions. Each oxide shows unique properties comprising behavior in the spray process, hardness, corrosion, and wear resistance. In order to exploit the different advantages, binary compositions are often used, while ternary compositions are not studied yet. Atmospheric plasma spraying (APS) of ternary compositions in the Al2O3-Cr2O3-TiO2 system was studied using blends of plain powders with different ratios and identical spray parameters. Coatings from the plain oxides were studied for comparison. For these powder blends, different deposition rates were observed. The microstructure, roughness, porosity, hardness, and wear resistance were investigated. The formation of the splats from particles of each oxide occurs separately, without interaction between the particles. The exception are the chromium oxide splats, which contained some amounts of titanium. The predominant oxide present in each blend has a decisive influence on the properties of the coatings. While TiOx causes a low coating porosity, the wear resistance can be increased by adding Cr2O3.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced ceramic materials synthesis · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, Germany
Fraunhofer Institute for Ceramic Technologies and Systems, Fraunhofer IKTS, D-01277 Dresden, Germany
Funding
Deutsche Forschungsgemeinschaft · Sächsische Aufbaubank
References (21)
Show source-provided references
1. Thermisch gespritzte Schichten im System Al2O3-Cr2O3-TiO2—ein Update10.1002/mawe.201400260 ↗
2. Roy, M., and Davim, J.P. (2015). Tribology of Thermally Sprayed Coatings in the Al2O3-Cr2O3-TiO2 System. Thermal Sprayed Coatings and Their Tribological Performances, Engineering Science Reference.10.4018/978-1-4666-7489-9 ↗
3. Fauchais, P.L., Heberlein, J.V.R., and Boulos, M.I. (2014). Thermal Spray Fundamentals: From Powder to Part, Springer.10.1007/978-0-387-68991-3 ↗
4. Pawlowski, L. (2008). The Science and Engineering of Thermal Spray Coatings, Wiley. [2nd ed.].10.1002/9780470754085 ↗
5. Demands, Potentials, and Economic Aspects of Thermal Spraying with Suspensions: A Critical Review10.1007/s11666-015-0274-7 ↗
6. Development and Application of Binary Suspensions in the Ternary System Cr2O3-TiO2-Al2O3 for S-HVOF Spraying10.1007/s11666-018-0709-z ↗
7. On the formation of thermally sprayed alumina coatings10.1007/BF00550387 ↗
8. Alumina-base plasma-sprayed materials part I: Phase stability of alumina and alumina-chromia10.1007/s11666-997-0066-9 ↗
9. Phase formation control in plasma sprayed alumina-chromia coatings
10. Dependence of the stabilization of α-Alumina on the spray process10.1007/s11666-007-9107-7 ↗
11. Preparation and structures of plasma-sprayed γ- and α-Al2O3 coatings10.1016/0257-8972(92)90004-T ↗
12. Sol infiltration and heat treatment of alumina-chromia plasma-sprayed coatings10.1016/S0955-2219(00)00276-4 ↗
13. Alumina coatings obtained by thermal spraying and plasma anodising—A comparison10.1016/j.surfcoat.2011.09.006 ↗
14. Microstructural Characteristics and Performances of Cr2O3 and Cr2O3-15%TiO2 S-HVOF Coatings Obtained from Water-Based Suspensions10.1007/s11666-018-0687-1 ↗
15. Yu, S.H., and Wallar, H. (2004). Chromia Spray Powders and a Process for Making the Same. (6,774,076), U.S. Patent.
16. Richter, A., Berger, L.-M., Conze, S., Sohn, Y.J., and Vaßen, R. (2019, January 6–7). Emergence and impact of Al2TiO5 in Al2O3-TiO2 APS coatings. Proceedings of the IOP Conference Series: Materials Science and Engineering 21th Chemnitz Seminar on Materials Engineering, Chemnitz, Germany.
17. Tribological behavior of a plasma-sprayed Al2O3-TiO2-Cr2O3 coating
18. Nanostructured and Conventional Cr2O3, TiO2, and TiO2-Cr2O3 Thermal-Sprayed Coatings for Metal-Seated Ball Valve Applications in Hydrometallurgy10.1007/s11666-016-0405-9 ↗
19. Impact of Al2O3-40 wt.% TiO2 feedstock powder characteristics on the sprayability, microstructure and mechanical properties of plasma sprayed coatings10.1016/j.jeurceramsoc.2019.08.026 ↗
20. Microstructure and properties of plasma-sprayed mixture of Cr2O3 and TiO210.1007/s11666-013-9969-9 ↗
21. Tribological behavior of plasma sprayed Al2O3-based cermet coatings10.1016/S0043-1648(99)00096-4 ↗