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A TiAl–Al2Ti4C2–TiC–Al2O3 in situ composite was fabricated using TiO2, Al, and C as starting materials through a mechanical-milling and subsequently a pressureless-sintering process. Discontinuous and cyclic-oxidation tests were then carried out at 800 and 900° C in air up to 500 hr or 1000 cycles to evaluate its oxidation and oxide-scale-spallation resistance. The present results demonstrated that...
A Ti 3 Al(O)-Al 2 O 3 in situ composite was explored as a coating system for Ti using thermal spray. Oxidation tests at 700-800 o C showed that this coating remarkably decreased the oxidation rate and increased the scale spallation resistance compared with Ti. The mechanisms for these improvements were then briefly discussed.
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