Performance of B 4 C/CeB 6 composites fabricated via hot pressing under different processes
Source abstract
Abstract
Abstract In this work, CeO 2 sintering additive reinforced B 4 C ceramic composites were prepared by hot‐pressing reaction sintering under different processes of low temperature–long holding time (1980°C, 30 MPa, 3 h, 4 wt% CeO 2 ) and high temperature–short holding time (2050°C, 30 MPa, .5 h, 4 wt% and 6 wt% CeO 2 ). The effect of sintering process and CeO 2 content on the microstructure and mechanical properties of B 4 C‐CeB 6 composites were investigated. The existed impurities in the obtained composites were also analyzed. Results show that CeO 2 is an active sintering additive. CeB 6 is formed by the reaction between CeO 2 , B 4 C and C in sintering process. The densification of B 4 C ceramics is enhanced, and the grains can be refined by the formed CeB 6 , which promotes the strength. The thermal expansion coefficient mismatch, crack deflection, and fracture mode change caused by the in situ formed CeB 6 improve the toughness. The process of low temperature–long holding time is more suitable for playing the role of CeO 2 additive in sintering of B 4 C, under which condition the relative density, flexural strength, fracture toughness, and hardness reach 99%, 417 MPa, 5.32 MPa·m 1/2 , and 30.66 GPa, respectively. The impurities in the composites are the kinds of Ti‐contained, C‐O‐Mg‐Ca‐contained, C‐O‐Ca‐S‐contained, and Si‐contained impurities.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Liaoning Engineering Laboratory of Special Optical Functional Crystals College of Environmental and Chemical Engineering Dalian University Dalian PR China
School of Metallurgy Northeastern University Shenyang PR China
State Key Laboratory of Light Alloy Casting Technology for High‐end Equipment Shenyang Research Institute of Foundry Co., Ltd Shenyang PR China
Foshan Graduate School Northeastern University Foshan PR China
Funding
Natural Science Foundation of Liaoning Province
References (31)
Show source-provided references
1. 10.1016/0955-2219(90)90048-K10.1016/0955-2219(90)90048-K ↗
2. 10.1007/BF0072004410.1007/BF00720044 ↗
3. Fabrication and applications progress of boron carbon for bulletproof ceramic
4. 10.1016/j.jeurceramsoc.2016.03.02810.1016/j.jeurceramsoc.2016.03.028 ↗
5. 10.1016/0022-5088(81)90223-X10.1016/0022-5088(81)90223-X ↗
6. 10.1016/j.compositesb.2019.10767410.1016/j.compositesb.2019.107674 ↗
7. 10.1016/j.jeurceramsoc.2018.05.01610.1016/j.jeurceramsoc.2018.05.016 ↗
8. 10.2320/matertrans.46.206710.2320/matertrans.46.2067 ↗
9. 10.1016/j.ceramint.2019.06.03210.1016/j.ceramint.2019.06.032 ↗
10. 10.1016/j.jallcom.2016.06.28010.1016/j.jallcom.2016.06.280 ↗
11. 10.1016/j.ceramint.2019.12.00710.1016/j.ceramint.2019.12.007 ↗
12. 10.1016/j.ceramint.2015.08.16010.1016/j.ceramint.2015.08.160 ↗
13. 10.1016/j.ceramint.2019.06.21410.1016/j.ceramint.2019.06.214 ↗
14. 10.1515/HTMP.2009.28.5.27710.1515/HTMP.2009.28.5.277 ↗
15. 10.1111/ijac.1364310.1111/ijac.13643 ↗
16. 10.1016/j.ceramint.2019.04.25110.1016/j.ceramint.2019.04.251 ↗
17. 10.1016/j.jeurceramsoc.2006.04.04210.1016/j.jeurceramsoc.2006.04.042 ↗
18. 10.1016/j.ceramint.2013.01.07310.1016/j.ceramint.2013.01.073 ↗
19. 10.1016/S1002-0721(07)60489-X10.1016/S1002-0721(07)60489-X ↗
20. Study of the performance and microstructure of CeB6/B4C ceramic composite via in‐situsynthesis
21. 10.1016/j.jnucmat.2010.12.09310.1016/j.jnucmat.2010.12.093 ↗
22. Ye DL · 1980
23. 10.1016/S1002-0721(08)60097-610.1016/S1002-0721(08)60097-6 ↗
24. The thermal conductivity and thermal expansing coefficient for hot‐pressed boron carbide
25. Preparation and properties of polycrystalline cerium hexaboride
26. 10.1016/j.jeurceramsoc.2014.02.03210.1016/j.jeurceramsoc.2014.02.032 ↗
27. 10.1016/0022-5088(83)90392-210.1016/0022-5088(83)90392-2 ↗
28. Synthesis of self‐assembled mesoporous zirconia with rheological phase reaction
29. 10.1016/j.ceramint.2020.05.29610.1016/j.ceramint.2020.05.296 ↗
30. 10.1098/rsta.1921.000610.1098/rsta.1921.0006 ↗
31. 10.1088/2053-1591/aad9d910.1088/2053-1591/aad9d9 ↗