Premium
Interfacial Reaction between Iron‐Based Alloys and Polycrystalline α‐Al 2 O 3
Author(s) -
Dubberstein Tobias,
Jahn Andreas,
Lange Michael,
Heller HansPeter,
Scheller Piotr R.
Publication year - 2014
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201300445
Subject(s) - materials science , crystallite , wetting , boron , feal , metallurgy , spinel , analytical chemistry (journal) , ferrous , partial pressure , contact angle , alloy , ceramic , sessile drop technique , oxygen , intermetallic , composite material , chemistry , organic chemistry , chromatography
The effect of temperature, atmosphere, and elemental concentrations of boron and phosphorous in ferrous alloys on the wettability of polycrystalline α‐Al 2 O 3 was studied. The investigation of the wetting behavior is of major importance to the infiltration of steel into open foam ceramics. In reference Fe‐0.46 wt% C iron samples, the contact angle was investigated between 1550 and 1650 °C under Ar‐H 2 and Ar atmospheres and was found to decrease with increasing temperature and increasing oxygen partial pressure. Furthermore, no FeAl 2 O 4 (hercynite) spinel type inclusions were found in Fe/Al 2 O 3 experiments. In the Fe‐P binary alloys, θ decreased with increasing phosphorous content and was ≈112° for the Fe‐0.299 wt% P alloy at 1600 °C. For the Fe‐B binary alloys, a strong influence of boron on the contact angle was found. Secondary neutral mass spectrometry (SNMS) analysis showed a maximum in the boron concentration in the first 50 nm of the metallic side of the interface. In the FeCrMnNi‐P high‐alloys specimens, a reaction layer was found between the steel/ceramic interfaces. The contact angle was ca. 90°, lower than the Fe‐P binary alloys.