Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems
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ZrB2 ceramics are considered potential materials for hypersonic systems in view of the melting point exceeding 3000 °C and excellent ablation resistance. Second phases, including SiC or CrB2, further improve the oxidation behavior, whereas a lighter phase, like TiB2 can decrease the overall weight. In this work, a powder mixture containing ZrB2, TiB2, CrB2 and SiC was mechanically activated using high energy ball-milling. Sintering was performed by hot pressing following different thermal cycles, and subsequent annealing to remove oxide phases and reduce micro-cracking. The microstructure and hardness of the dense ceramics are compared in relationship to the thermal history. Fully dense ceramics were obtained with different oxide-phases amount depending on the sintering cycle and hardness approaching 24 GPa were achieved. Future works will explore the strength and oxidation resistance of this multi-phase system to check its suitability for hypersonic systems.
Keywords:
mechanical activation / sintering / XRD / mechanical properties / ceramicsSource:
Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia, 2021, 83-83Publisher:
- Belgrade : Innovation Center of Faculty of Mechanical Engineering
Funding / projects:
- NATO project SPS G5767 - "Super Strong Ceramics for Protection in Harsh Environments and DefenCE" (SUSPENCE)
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Obradović, Nina AU - Filipović, Suzana AU - Gilli, N. AU - Silvestroni, L. PY - 2021 UR - https://dais.sanu.ac.rs/123456789/12352 AB - ZrB2 ceramics are considered potential materials for hypersonic systems in view of the melting point exceeding 3000 °C and excellent ablation resistance. Second phases, including SiC or CrB2, further improve the oxidation behavior, whereas a lighter phase, like TiB2 can decrease the overall weight. In this work, a powder mixture containing ZrB2, TiB2, CrB2 and SiC was mechanically activated using high energy ball-milling. Sintering was performed by hot pressing following different thermal cycles, and subsequent annealing to remove oxide phases and reduce micro-cracking. The microstructure and hardness of the dense ceramics are compared in relationship to the thermal history. Fully dense ceramics were obtained with different oxide-phases amount depending on the sintering cycle and hardness approaching 24 GPa were achieved. Future works will explore the strength and oxidation resistance of this multi-phase system to check its suitability for hypersonic systems. PB - Belgrade : Innovation Center of Faculty of Mechanical Engineering C3 - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia T1 - Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems SP - 83 EP - 83 UR - https://hdl.handle.net/21.15107/rcub_dais_12352 ER -
@conference{ author = "Obradović, Nina and Filipović, Suzana and Gilli, N. and Silvestroni, L.", year = "2021", abstract = "ZrB2 ceramics are considered potential materials for hypersonic systems in view of the melting point exceeding 3000 °C and excellent ablation resistance. Second phases, including SiC or CrB2, further improve the oxidation behavior, whereas a lighter phase, like TiB2 can decrease the overall weight. In this work, a powder mixture containing ZrB2, TiB2, CrB2 and SiC was mechanically activated using high energy ball-milling. Sintering was performed by hot pressing following different thermal cycles, and subsequent annealing to remove oxide phases and reduce micro-cracking. The microstructure and hardness of the dense ceramics are compared in relationship to the thermal history. Fully dense ceramics were obtained with different oxide-phases amount depending on the sintering cycle and hardness approaching 24 GPa were achieved. Future works will explore the strength and oxidation resistance of this multi-phase system to check its suitability for hypersonic systems.", publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering", journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia", title = "Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems", pages = "83-83", url = "https://hdl.handle.net/21.15107/rcub_dais_12352" }
Obradović, N., Filipović, S., Gilli, N.,& Silvestroni, L.. (2021). Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia Belgrade : Innovation Center of Faculty of Mechanical Engineering., 83-83. https://hdl.handle.net/21.15107/rcub_dais_12352
Obradović N, Filipović S, Gilli N, Silvestroni L. Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:83-83. https://hdl.handle.net/21.15107/rcub_dais_12352 .
Obradović, Nina, Filipović, Suzana, Gilli, N., Silvestroni, L., "Preparation and characterization of ZrB2-TiB2 based composites for hypersonic systems" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):83-83, https://hdl.handle.net/21.15107/rcub_dais_12352 .