Effect of Chopped Carbon Fiber on Mechanical Properties of ZrB2-SiC Composite

مهندسی متالورژی و مواد

Article 6, Volume 29, Issue 2 - Serial Number 18, November 2018, Pages 127-136   

Document Type: Original Articles

DOI: 10.22067/ma.v0i29.58253

Authors

zohre balak^* ; mahdi azizieh; hosein kafashan

islamic azad university, ahvaz,branch

Abstract

In this research, effect of carbon fiber (Cf) and its content on sinter-ability, hardness and fracture toughness of ZrB2-SiC composites which were produced by spark plasma sintering, was studied. For this purpose, four composites with different Cf content (10, 20, 30 and 40 vol%) were sintered by spark plasms at 1800 °C, 40 MPa pressure for 6 minutes by with a heating rate of ~50 °C/min. In order to evaluate the microstructure, scanning electron microscopy, EDS and x-ray diffraction was applied. The hardness and fracture toughness were measured by macro-Vickers and SENB method, respectively. In this research, Cf addition does not have any significant effect on hardness. The results showed by increasing Cf, relative density decreases and open porosity percent increases. Fracture toughness of ZrB2-SiC composites was improved by increasing Cf content.

Keywords

ZrB2-SiC composite; Cf, spark plasma sintering (SPS); fracture toughness

References

1. Chamberlain, A.L., Fahrenholtz W.G., Hilmas G.E., "Pressureless of zirconium diboride", Journal of the American Ceramic Society, Vol. 89, pp. 450-456, (2006).
2. Licheri R., Orrù R., Musa C., Cao G., "Combination of SHS and SPS Techniques for fabrication of fully dense ZrB2-ZrC-SiC composites", Material Letters, pp. 432–435, (2008).
3. George M.R., "Studies of ultra- high temperature ceramic composite components: synthesis and characterization of HfOxCy and Si oxidation in atomic oxygen containing environments", Ph.D. Thesis, Vander Bilt University, pp. 40-43, (2008).
4. Guo S.Q., "Densification of ZrB2-based composites and their mechanical and physical properties: A review", Journal of European Ceramic Society, Vol. 29, pp. 995–1011, (2009).
5. Guo W.M., Yang Z.G., Vleugels J., Zhang G.J., "Effect of pressure loading cycle on spark plasma sintered ZrB2–SiC–Yb2O3 ceramics", Ceramics International, Vol. 38, pp. 5293–5297, (2012).
6. Guo W.M., Vleugels J., Zhang G.J., Wang P.L., Van der Biest O., "Effect of heating rate on densification, microstructure and strength of spark plasma sintered ZrB2-based ceramics”, Scripta Materialia, Vol. 62, pp. 802–805, (2010).
7. Yang F., Zhang X., Han J., Du S., "Mechanical properties of short carbon fiber reinforced ZrB2–SiC ceramic matrix composites", Material Letters, Vol. 62, pp. 2925–2927, (2008).
8. Yang F., Zhang X., Han J., Du S., "Processing and mechanical properties of short carbon fibers toughened zirconium diboride-based ceramics", Materials and Design, Vol. 29, pp. 1817–1820, (2008).
9. Yang F., Zhang X., Han J., Du S., "Characterization of hot-pressed short carbon fiber reinforced ZrB2–SiC ultra-high temperature ceramic composites", Journal of Alloys and Compounds, Vol. 472, pp. 395–399, (2009).
10. Guo S., Naito K., Kagaw Y., "Mechanical and physical behaviors of short pitch-based carbon fiber-reinforced HfB2–SiC matrix composites", Ceramics International, Vol. 39, pp. 1567–1574, (2013).
11. Nasiri Z., Mashadi M., Abdollahi A., "Effect of short carbon fiber addition on Pressureless densification and mechanical properties of ZrB2-SiC-Csf nanocomposite", Vol. 51, pp. 216-223, (2016).