Wetting,reactivity, and phase formation at interfaces between Ni–Al melts and TiB2 ultrahigh‐temperature ceramic |
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| Authors: | Lixia Xi Ivan Kaban Rafal Nowak Grzegorz Bruzda Natalia Sobczak Jürgen Eckert |
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| Affiliation: | 1. IFW Dresden, Institute for Complex Materials, Dresden, Germany;2. TU Dresden, Institute of Materials Science, Dresden, Germany;3. Center for High‐Temperature Studies, Foundry Research Institute, Cracow, Poland;4. Institute of Precision Mechanics, Warsaw, Poland;5. Austrian Academy of Sciences, Erich Schmid Institute of Materials Science, Leoben, Austria;6. Department Materials Physics, Montanuniversit?t Leoben, Leoben, Austria |
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| Abstract: | The wetting, reactivity, and phase formation at the liquid Ni–Al/TiB2 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.%, TiB2 precipitates are found in the solidified Ni–Al droplets after the high‐temperature interaction of the melts with TiB2 substrates. Besides, new (Al,Ti)Ni3 and (Al,Ti)2Ni21B6 phases are formed due to dissolution of TiB2 ceramic in Ni‐rich melts and subsequent solidification. |
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| Keywords: | interfaces titanium diboride ultrahigh‐temperature ceramics wetting |
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