The Influence of SiO2 + SiC + Al (H2PO4)3 Coating on Mechanical and Dielectric Properties for SiCf/MWCNTS/AlPO4 Composites
Abstract
:1. Introduction
2. Experimental Details
2.1. Materials
2.2. Preparation of the Composites
2.3. Preparation of the Coating
2.4. Test Equipment
3. Results and Discussion
3.1. Investigation of Bending Strength
3.2. Investigation of Dielectric Property
3.3. Investigation of the Coating
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Substance | AlPO4 | SiO2-AlPO4 Solid Solution | SiP2O7 | SiO2 | |
---|---|---|---|---|---|
Dielectric Constant | |||||
ε′ | 4.0–4.3 | 3.8–4.2 | 2.0–2.4 | 3.4–3.7 | |
ε″ | 0.1–0.3 | 0.1–0.3 | 0.1–0.2 | 0.2–0.4 |
Bend Strength/MPa | ε′ | ε″ | |
---|---|---|---|
Pure SiCf/AlPO4 composites | 3.6–4.1 | 0.1–0.2 | |
Coated SiCf/AlPO4 composites | 4.2–4.5 | 0.2–0.5 | |
Coated SiCf/MWCNTS/AlPO4 composites | 5.0–6.3 | 1.8–3.6 | |
Coated SiCf/MWCNTS/AlPO4 composites of oxidization | 5.2–6.6 | 2.3–3.2 | |
Coated SiCf/MWCNTS/AlPO4 composites | 205 | ||
Coated SiCf/MWCNTS/AlPO4 composites of oxidization | 190 | ||
Uncoated SiCf/MWCNTS/AlPO4 composites of oxidization | 60 |
Code | Reaction | ∆G/kJ/mol at 1273 K |
---|---|---|
(1) | SiC + 1/2O2 ⇔ SiO(g) + C | −156.07 |
(2) | SiC + O2 ⇔ SiO2 + C | −632.91 |
(3) | SiC + O2 ⇔ SiO(g) + CO(g) | −379.94 |
(4) | SiC + 3/2O2 ⇔ SiO2 + CO(g) | −855.27 |
(5) | C + 1/2O2 ⇔ CO(g) | −223.59 |
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Zhu, Y.; Wan, F.; Yan, J.; Xu, H. The Influence of SiO2 + SiC + Al (H2PO4)3 Coating on Mechanical and Dielectric Properties for SiCf/MWCNTS/AlPO4 Composites. Materials 2022, 15, 5178. https://0-doi-org.brum.beds.ac.uk/10.3390/ma15155178
Zhu Y, Wan F, Yan J, Xu H. The Influence of SiO2 + SiC + Al (H2PO4)3 Coating on Mechanical and Dielectric Properties for SiCf/MWCNTS/AlPO4 Composites. Materials. 2022; 15(15):5178. https://0-doi-org.brum.beds.ac.uk/10.3390/ma15155178
Chicago/Turabian StyleZhu, Yan, Feng Wan, Jianhui Yan, and Hongmei Xu. 2022. "The Influence of SiO2 + SiC + Al (H2PO4)3 Coating on Mechanical and Dielectric Properties for SiCf/MWCNTS/AlPO4 Composites" Materials 15, no. 15: 5178. https://0-doi-org.brum.beds.ac.uk/10.3390/ma15155178