Effect of Nb on the Interfacial Wettability in Al2O3/Medium Mn Steel

Abstract

Abstract: To develop medium Mn steel (MMS) matrix composites reinforced by Al2O3 particles, the effect of Nb on the interfacial wettability of Al2O3/MMS and its mechanism were investigated in this paper. The results show that the wetting angle of the specimens with different Nb contents are bigger than that of the specimen without Nb at the first stage, and then decreases with time at 1450 ºC. At certain time, the wetting angle is lower than that of the specimen without Nb. At 1550 and 1600ºC, the wetting angle of the specimens containing Nb decreases quickly with time at first stage. After 10 min, the wetting angle reaches a steady state, and hardly changes with time. The mechanisms of Nb to improve the wettability can be attributed to the enrichment of Nb at the interface and Nb serves as surface active agent of MMS at T<1550ºC, and as catalyzer for the interfacial reaction of Al2O3/MMS at T≥1550ºC, and reduces the interfacial energies.

Key words: Madium Mn steel, Al2O3, Nb, Wettability

Sirong YU, Yaohui LIU, Zhenming HE. Effect of Nb on the Interfacial Wettability in Al2O3/Medium Mn Steel[J]. J Mater Sci Technol, 2003, 19(06): 625-627.

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Effect of Nb on the Interfacial Wettability in Al2O3/Medium Mn Steel

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