Cyclic-oxidation behavior of Ti3SiC2-base material at 1100°c

Sun, Z.Q., Zhou, Y., & Li, M. (2002) Cyclic-oxidation behavior of Ti3SiC2-base material at 1100°c. Oxidation of Metals, 57(5), pp. 379-394.

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Abstract

The cyclic-oxidation behavior of Ti3SiC2-base material was studied at 1100°C in air. Scale spallation and weight loss were not observed in the present tests and the weight gain would just continue if the experiments were not interrupted. The present results demonstrated that the scale growth on Ti3SiC2-base material obeyed a parabolic rate law up to 20 cycles. It then changed to a linear rate with further increasing cycles. The scales formed on the Ti3SiC2base material were composed of an inward-growing, fine-grain mixture of Ti022 + SiO2 and an outward-growing, coarse-grain TiO2. Theoretical calculations show that the mismatch in thermal expansion coefficients between the inner scale and Ti3SiC2-base matrix is small. The outer TiO2 layer was under very low compressive stress, while the inner TiO2 + SiO2 layer was under tensile stress during cooling. Scale spaliation is, therefore, not expected and the scale formed on Ti3SiC2-base material is adherent and resistant to cyclic oxidation.

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ID Code: 94648
Item Type: Journal Article
Refereed: Yes
Keywords: cyclic oxidation – Ti3SiC2-base material – scale spallation – adherence
DOI: 10.1023/A:1015363119164
ISSN: 1573-4889
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 10 Apr 2016 23:10
Last Modified: 10 Apr 2016 23:10

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