Journal of materials science, 2022-02, Vol.57 (6), p.4145
2022
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- Autor(en) / Beteiligte
- Titel
- Toughening mechanism of in-situ synthesized ZrB.sub.2 based composite coating by plasma spraying
- Ist Teil von
- Journal of materials science, 2022-02, Vol.57 (6), p.4145
- Ort / Verlag
- Springer
- Erscheinungsjahr
- 2022
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- ZrB.sub.2-based composite coatings have broad application prospects in hypersonic aircraft, rockets, and re-entry spacecraft. However, poor toughness of the ZrB.sub.2 coating is an important problem to be solved urgently. This study designed and prepared ZrO.sub.2-B.sub.4C-Al precursor and nano-ZrB.sub.2-based composite coating were prepared in situ by reactive plasma spraying. The obtained toughness values of coating by plasma spraying ZrO.sub.2-B.sub.4C-Al powder increased by 241% in comparison with the coating by plasma spraying ZrB.sub.2-ZrC-Al.sub.2O.sub.3 powder. The coupling action of the toughening mechanism such as fine-grain strengthening, toughening crack deflection, and crack bridging greatly improved the toughness of the coating. This paper provides a novel idea for the preparation of high-properties nano-ZrB.sub.2 based composite coatings. Graphical abstract