Gas pressure sintering of BN/Si3N4 wave-transparent material with Y2O3–MgO nanopowders addition
Source abstract
Abstract
BN/Si3N4 ceramics performed as wave-transparent material in spacecraft were fabricated with boron nitride powders, silicon nitride powders and Y2O3–MgO nanopowders by gas pressure sintering at 1700 °C under 6 MPa in N2 atmosphere. The effects of Y2O3–MgO nanopowders on densification, phase evolution, microstructure and mechanical properties of BN/Si3N4 material were investigated. The addition of Y2O3–MgO nanopowders was found beneficial to the mechanical properties of BN/Si3N4 composites. The BN/Si3N4 ceramics with 8 wt% Y2O3–MgO nanopowders showed a relative density of 80.2%, combining a fracture toughness of 4.6 MPa m1/2 with an acceptable flexural strength of 396.5 MPa.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Boron and Carbon Nanomaterials Research · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Oxidation bonding of porous silicon nitride ceramics with high strength and low dielectric constant10.1016/j.matlet.2006.08.067 ↗
2. High strength three-dimensional silica fiber reinforced silicon nitride-based composites via poly hydridomethylsilazane pyrolysis10.1016/j.ceramint.2006.01.018 ↗
3. Si3N4 and Si2N2O for high performance randomes10.1016/0025-5416(85)90236-8 ↗
4. Silicon nitride and related materials10.1111/j.1151-2916.2000.tb01182.x ↗
5. Interface structure and atomic bonding characteristics in silicon nitride ceramics10.1126/science.1104173 ↗
6. Fabrication and characterization of SiO2(f)/Si3N4 composites10.1016/S1005-8850(07)60089-9 ↗
7. Mechanical and dielectric properties of porous Si3N4–SiO2 composite ceramics10.1016/j.msea.2008.09.066 ↗
8. Investigation of the physical and mechanical properties of hot-pressed machinable Si3N4/h-BN composites and FGM10.1016/S0921-5107(01)01048-0 ↗
9. Mechanical properties of gas pressure sintered Si3N4/SiC nanocomposites10.1016/S0955-2219(01)00526-X ↗
10. Review: silicon nitride crystal structure and observations of lattice defects10.1007/BF01159294 ↗
11. Sintering of Y2O3–Al2O3-doped β-Si3N4 powder and mechanical properties of sintered materials10.2109/jcersj.102.790 ↗
12. Microstructure of Y2O3 fluxed hot-pressed silicon nitride10.1111/j.1151-2916.1978.tb09251.x ↗
13. Microstructure of silicon nitride ceramics sintered with rare-earth oxide10.1016/0956-7151(94)00298-V ↗
14. Consolidation, microstructure, and mechanical properties of Si3N4 doped with rare-earth oxides10.1111/j.1151-2916.1974.tb10806.x ↗
15. The microstructure and distribution of impurities in hot-pressed and sintered silicon nitride10.1111/j.1151-2916.1979.tb12737.x ↗
16. On the equilibrium thickness of intergranular glass phases in ceramic materials10.1111/j.1151-2916.1987.tb04846.x ↗
17. Effect of crystallizing the grain-boundary glass phase on the high-temperature strength of hot-pressed Si3N4 containing Y2O310.1111/j.1151-2916.1975.tb11488.x ↗
18. Fabrication and secondary-phase crystallization of rare-earth disilicate–silicon nitride ceramics10.1111/j.1151-2916.1992.tb04462.x ↗
19. Strength and creep behavior of rare-earth disilicate silicon nitride ceramics10.1111/j.1151-2916.1992.tb04464.x ↗
20. Oxidation of silicon nitride sintered with rare-earth oxide additions10.1111/j.1151-2916.1985.tb10157.x ↗
21. A foaming esterification sol–gel route for the synthesis of magnesia–yttria nanocomposites10.1111/j.1551-2916.2010.04343.x ↗
22. High temperature strength of silicon nitride ceramics with ytterbium silicon oxynitride10.1557/JMR.1997.0027 ↗
23. Phase transformation and microstructural changes of Si3N4 during sintering10.1007/BF01184561 ↗
24. Microstructure in silicon nitride containing β-phase seeding, Part 110.1557/JMR.1999.0397 ↗
25. On the α-to-β phase transformation in silicon nitride10.1016/0025-5416(88)90491-0 ↗
26. Microstructural development in porous β-Si3N4 ceramics prepared with low volume RE2O3–Mg–(CaO) additions (RE=La, Nd, Y, Yb)10.1016/j.msea.2007.12.023 ↗
27. Silicon nitride ceramics: scientific and technological issues
28. Effect of WC on microstructure and mechanical properties of silicon nitride nano-composites10.1016/j.jmatprotec.2007.11.200 ↗
29. Metal oxide additives for the sintering of silicon carbide:reactivity and densification10.1016/j.cap.2012.07.027 ↗
30. Mechanism of grain growth and α-to-β transformation during liquid phase sintering of β-sialon10.1111/j.1151-2916.1988.tb06417.x ↗
31. Effects of sintering aids on mechanical and dielectric properties of Si3N4 ceramics10.1179/143307510X12777574295424 ↗