High‐temperature oxidation resistance and antifailure mechanism of MAO‐SG composite coating on TC4 titanium alloy
Source abstract
Abstract
Abstract To refine microarc oxidation (MAO) coating surface micropores, and enhance the coating's toughness and oxidation resistance. In the process of MAO, negatively charged CeO 2 particles are adsorbed and deposited into the coating under the action of electrophoresis, and a 6 g/L CeO 2 doped MAO coating is prepared. Then, the Al 2 O 3 ‐SiO 2 composite sol‐gel seal coating was used to obtain the microarc oxidation‐sol‐gel composite coating (MAO‐SG). The TC4 substrate, undoped MAO coating, CeO 2 doped MAO coating, and MAO‐SG composite coating were subjected to high‐temperature oxidation at 650, 750, and 850°C, respectively. The results show that the composite coating exhibits excellent high‐temperature oxidation resistance at three temperatures. Compared with the undoped MAO coating, the maximum oxidation weight gain per unit area of the MAO‐SG coating was reduced by 13.44%, 23.87%, and 38.16%, and the average oxidation rate was reduced by 17.15%, 50.98%, and 69.37%, respectively. The sol‐gel layer on the surface of the composite coating will decompose α‐Al 2 O 3 at high temperatures, and form a dense protective layer on the surface of the MAO coating and protect the MAO coating, which greatly improves the high‐temperature oxidation resistance of the TC4 titanium alloy.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · High-Temperature Coating Behaviors · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University Chengdu China
School of New Energy and Materials Southwest Petroleum University Chengdu China
Funding
National Natural Science Foundation of China · State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation · Southwest Petroleum University
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