Abstract
This study concerns an attempt to enhance the resistance to high-temperature isothermal and cyclic oxidation of Ti in dry air by laser-surface alloying (LSA) with Si and Si+Al. LSA was carried out by codeposition of alloy powders during lasing under the predetermined, optimum-processing routine that ensured formation of a compact, well-adherent, crack-free and homogeneous alloyed zone. The results of oxidation kinetics in the temperature range 950–1150 K for 1–400 hr indicate that surface alloying with Si imparts excellent oxidation resistance up to 1050 K. However, at a higher temperature of 1150 K, surface alloying with 3Si+Al yields a better resistance to oxidation. A detailed characterization of the microstructure and distribution of the phases within the scale and alloyed zone following oxidation studies has been undertaken to suggest the possible mechanism for enhanced oxidation resistance of Ti imparted by laser-surface alloying.
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Dutta Majumdar, J., Mordike, B.L., Roy, S.K. et al. High-Temperature Oxidation Behavior of Laser-Surface-Alloyed Ti with Si and Si + Al. Oxidation of Metals 57, 473–498 (2002). https://doi.org/10.1023/A:1015300405051
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DOI: https://doi.org/10.1023/A:1015300405051