Ferrite Nucleation at Ceramic/Austenite Interfaces

Pure polycrystal ceramics (TiC, TiN, TiO, VN, AIN and Al2O3) were heat-pressure-bonded to an Fe-0.1 mass%C-2 mass%Mn alloy and were isothermally reacted below the Ae3 temperature for the proeutectoid ferrite reaction to occur. The number of ferrite particles per unit area of bonded interfaces was me...

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Bibliographic Details
Published in:ISIJ International 1996/10/15, Vol.36(10), pp.1301-1309
Main Authors: Zhang, Sanhong, Hattori, Nobuyuki, Enomoto, Masato, Tarui, Toshimi
Format: Article
Language:English
Subjects:
Applied sciences
bonding
ceramics
Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
ferrite transformation
interfacial energy
iron alloy
Materials science
Metals. Metallurgy
nucleation
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
strain energy
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Summary:Pure polycrystal ceramics (TiC, TiN, TiO, VN, AIN and Al2O3) were heat-pressure-bonded to an Fe-0.1 mass%C-2 mass%Mn alloy and were isothermally reacted below the Ae3 temperature for the proeutectoid ferrite reaction to occur. The number of ferrite particles per unit area of bonded interfaces was measured using Schwartz-Saltykov method and was compared with the number of particles formed at grain boundaries. VN was most effective in stimulating ferrite nucleation whereas TiO was least effective. All other ceramics showed more or less similar potencies for ferrite formation. VN is capable of forming lower energy interfaces with ferrite than other ceramics, through the possibility of V diffusion into the alloy during and after bonding may not be ruled out in this experiment. On the other hand, the least effectiveness of TiO in stimulating ferrite nucleation is possibly due to the proximity of thermal expansion coefficient to iron.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.36.1301