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Wetting, reactivity, and phase formation at interfaces between Ni–Al melts and TiB 2 ultrahigh‐temperature ceramic
Author(s) -
Xi Lixia,
Kaban Ivan,
Nowak Rafal,
Bruzda Grzegorz,
Sobczak Natalia,
Eckert Jürgen
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15188
Subject(s) - wetting , dissolution , liquidus , materials science , ceramic , sessile drop technique , drop (telecommunication) , dewetting , phase (matter) , kinetics , metallurgy , reactivity (psychology) , chemical engineering , analytical chemistry (journal) , composite material , chemistry , alloy , telecommunications , physics , organic chemistry , quantum mechanics , computer science , engineering , medicine , alternative medicine , pathology , chromatography
The wetting, reactivity, and phase formation at the liquid Ni–Al/TiB 2 ceramic interfaces have been investigated at the temperatures close to the Ni–Al liquidus line. The wetting kinetics has been studied by the sessile drop technique utilizing liquid drop dispension and high‐speed high‐resolution video imaging. It is established that the wetting behavior changes from a nonreactive for the Al‐rich melts to a dissolution‐reactive for the Ni‐rich melts. For the Ni concentration ≥40 at.%, TiB 2 precipitates are found in the solidified Ni–Al droplets after the high‐temperature interaction of the melts with TiB 2 substrates. Besides, new (Al,Ti)Ni 3 and (Al,Ti) 2 Ni 21 B 6 phases are formed due to dissolution of TiB 2 ceramic in Ni‐rich melts and subsequent solidification.