Abstract
In this research, the effect of different amounts of Cr2O3 (2.5, 5, 7.5, and 10 wt.%) and sintering temperature (1850, 1900, and 1950 °C) on the sinterability and mechanical properties of liquid-phase sintered SiC-matrix composites was studied. First, raw materials were ground for 3 h using a planetary mill whose rotational speed was 180 rpm. The process of pressing the samples was completed using uniaxial pressing with the applied pressure of 90 MPa. Finally, the samples were sintered under an argon atmosphere at various temperatures for 1.5 h. In the end, the best sintered sample was annealed at 2000°C for 2 h. The phases, microstructure, and chemical composition of the samples were studied using X-ray diffraction analysis (XRD) and field emission scanning electron microscopy (FESEM), respectively. The results suggested that the composite that contained 5 wt.% Cr2O3 and that was sintered at 1900 °C exhibited the best properties. The relative density, microhardness, elastic modulus, flexural strength, indentation fracture resistance, and brittleness index were 97.45%, 27.50 GPa, 395 GPa, 549 MPa, 6.2 MPa m1/2, and 282.58 ×10−6 m−1 respectively. At 1850 °C and 1950 °C, the best mechanical properties were acquired for the samples containing 5 wt.% Cr2O3. According to microscopic images, the formation of elongated grains and the activation of crack deflection as well as crack bridging mechanisms were the most significant mechanisms enhancing the toughness of these composites. The results showed that the sintered sample at 1900 °C, containing 5% additive and annealed at 2000 °C for 2 h, reached the highest fracture toughness (6.92 MPa m1/2). The microscopic images showed that the matrix grains of the as-annealed samples were elongated. There were signs of transgranular fracture at the cross-section of the samples.
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References
Lopez, O., Ortiz, A., Guiberteau, F., Padture, N.: Microstructural design of sliding wear sliding wear-resistant liquid-phase-sintered SiC: an overview. J. Eur. Ceram. Soc. 27, 3351–3357 (2007)
Janney, M.: Mechanical properties and oxidation behavior of a hot pressed SiC-15 vol.% TiB2 composite. Am. Ceram. Soc. Bull. 66, 322–324 (1987)
H. Chin, K. Cheong, A. Ismail, A review on die attach materials for SiC-based high-temperature power devices, (2010).
Noviyanto, A., Yoon, D.: One component metal oxide sintering additive for β-SiC based on thermodynamic calculation and experimental observations. Met. Mater. Int. 1, 63–68 (2012)
Noviyanto, A., Yoon, D.: Metal oxide additives for the sintering of silicon carbide: reactivity and densification. Curr. Appl. Phys. 13, 287–292 (2013)
Ortiz, A.L., Borrero-Lopez, O., Quadir, M.Z., Guiberteau, F.: A route for the pressureless liquid-phase sintering of SiC with low additive content for improved sliding-wear resistance. J. Eur. Ceram. Soc. 32, 965–976 (2012)
Ribeiro, S., Genova, L.A., Ribeiro, G.C., Oliveira, M.R., Bressiani, A.H.A.: Effect of heating rate on the shrinkage and microstructure of liquid phase sintered SiC ceramics. Ceram. Int. 42, 17398–17404 (2016)
Khodaei, M., Yaghobizadeh, O., Baharvandi, H.R., Dashti, A.: Effects of different sintering methods on the properties of SiC-TiC, SiC-TiB2 composites. Int. J. Refract. Met. H. 70, 19–31 (2018)
Magnani, G., Beltrami, G.: Gl. Minoccari, L. pilotti, Pressureless sintering and properties of αSiC-B4C composite. J. Eur. Ceram. Soc. 21, 633–638 (2001)
Ribeiro, S., Ribeiro, G.C.: Mrego de oliveira, Properties of SiC ceramics sintered via liquid phase using Al2O3 + Y2O3, Al2O3 + Yb2O3 and Al2O3 + Dy2O3 as additives: a comparative study. Mater. Res. 18, 525–529 (2015)
Khodaei, M., Yaghobizadeh, O., Shahraki, A.A., Esmaeeli, S.: Investigation of the effect of Al2O3–Y2O3–CaO (AYC) additives on sinterability, microstructure and mechanical properties of SiC matrix composites: a review. Int. J. Refract. Met. H. 78, 9–26 (2018)
Suzuki, K., Sasaki, M.: Effects of sintering atmosphere on grain morphology of liquid phase-sintered SiC with Al2O3 additions. J. Eur. Ceram. Soc. 25, 1611–1618 (2005)
Zhang, J., Jiang, D., Lin, Q., Chen, Z., Huang, Z.: Properties of silicon carbide ceramics from gelcasting and pressureless sintering. Mater. Des. 65, 12–16 (2015)
Noviyanto, A., Yoon, D.H.: Rare-earth oxide additives for the sintering of silicon carbide. Diam. Relat. Mater. 38, 124–130 (2013)
Tatarko, P., Lojanova, Š., Dusza, J., Šajgalik, P.: Influence of various rare-earth oxide additives on microstructure and mechanical properties of silicon nitride based nanocomposites. Mater. Sci. Eng. A. 527, 4771–4778 (2010)
Liang, H., Yao, X., Zhang, J., Liu, X., Huang, Z.: The effect of rare earth oxides on the pressureless liquid phase sintering of α-SiC. J. Eur. Ceram. Soc. 34, 2865–2874 (2014)
Lopez, O.B., Ortiz, A., Guiberteau, F., Padture, N.: Effect of liquid-phase content on the contact-mechanical properties of liquid-phase-sintered α-SiC. J. Eur. Ceram. Soc. 27, 2521–2527 (2007)
Magnani, G., Minoccari, G.L., Pilotti, L.: Flexural strength and toughness of liquid phase sintered silicon carbide. Ceram. Int. 26, 495–500 (2000)
Neher, R., Herrmann, M., Brandt, K., Jaenicke-Roessler, K., Pan, Z., Fabrichnaya, O., Seifert, H.J.: Liquid phase formation in the system SiC, Al2O3, Y2O3. J. Eur. Ceram. Soc. 31, 175–181 (2011)
Khodaei, M., Yaghobizadeh, O., Alhosseini, S.H.N., Esmaeeli, S., Mousavi, S.R.: The effect of oxide, carbide, nitride and boride additives on properties of pressureless sintered SiC: a review. J. Eur. Ceram. Soc. 39, 2215–2231 (2019)
Ihle, J., Herrmann, M., Adler, J.: Phase formation in porous liquid phase sintered silicon carbide: part III: interaction between Al2O3–Y2O3 and SiC. J. Eur. Ceram. Soc. 25, 1005–1013 (2005)
Lee, S.M., Kim, T.W., Lim, H.J., Kim, C., Kim, Y.W., Lee, K.S.: Mechanical properties and contact damages of nanostructured silicon carbide ceramics. J. Ceram. Soc. Jpn. 115, 304–309 (2007)
Huang, Z.H., Jia, D.C., Zhou, Y., Wang, Y.J.: Effect of a new additive on mechanical properties of hot-pressed silicon carbide ceramics. Mater. Res. Bull. 37, 933–940 (2002)
Khodaei, M., Yaghobizadeh, O., Ehsani, N., Baharvandi, H.R.: The effect of TiO2 additive on the electrical resistivity and mechanical properties of pressureless sintered SiC ceramics with Al2O3-Y2O3. Int. J. Refract. Met. H. 76, 141–148 (2018)
Huang, Z.H., Jia, D.C., Zhou, Y., Liu, Y.G.: A new sintering additive for silicon carbide ceramic. Ceram. Int. 29, 13–17 (2003)
Zhan, G.D., Ikuhara, Y., Mitomo, M., Xie, R.J., Sakuma, T., Mukherjee, A.K.: Microstructural analysis of liquid-phase-Sintered β-Silicon carbide. J. Am. Ceram. Soc. 85, 430–436 (2002)
Gu, H., Nagano, T., Zhan, G.D., Mitomo, M.: Dynamic evolution of grain boundary films in liquid-phase-sintered ultrafine silicon carbide material. J. Am. Ceram. Soc. 86, 1753–1760 (2003)
Lee, S.G., Kim, Y.W., Mitomo, M.: Relationship between microstructure and fracture toughness of toughened silicon carbide ceramics. J. Am. Ceram. Soc. 84, 1347–1353 (2001)
Khodaei, M., Yaghobizadeh, O., Ehsani, N., Baharvandi, H.R., Dashti, A.: The effect of TiO2 additive on sinterability and properties of SiC-Al2O3-Y2O3 composite system. Ceram. Int. 44, 16535–16542 (2018)
Foster, D., Thompson, D.P.: The use of MgO as a densification aid for α-SiC. J. Eur. Ceram. Soc. 19, 2823–2831 (1999)
Gubernat, A., Stobierski, L., Labaj, P.: Microstructure and mechanical properties of silicon carbide pressureless sintered with oxide additives. J. Eur. Ceram. Soc. 27, 781–789 (2007)
Zawrah, M.F., Shaw, L.: Liquid-phase sintering of SiC in presence of CaO. Ceram. Int. 30, 721–725 (2004)
Eom, J.H., Seo, Y.K., Kim, Y.W.: Mechanical and thermal properties of pressureless sintered silicon carbide ceramics with alumina–Yttria–Calcia. J. Am. Ceram. Soc. 99, 1735–1741 (2016)
Liang, H., Yao, X., Zhang, H., Liu, X., Huang, Z.: In situ toughening of pressureless liquid phase sintered α-SiC byusingTiO2. Ceram. Int. 40, 10699–10704 (2014)
Ahmoye, D., Krstic, V.D.: Reaction sintering of SiC composites with in situ converted TiO2 to TiC. J. Mater. Sci. 50, 2806–2812 (2015)
Khodaei, M., Yaghobizadeh, O., Baharvandi, H.R., Alipour Shahrakia, A., Mohammadi, H.: The effect of nano-TiO2 additions on the densification and mechanical properties of SiC-matrix composite. Ceram. Int. (2020)
Guo, W., Jin, Z., Xu, T., Wu, W.: Low–temperature pressureless sintering of SiC ceramics with Al2O3-Y2O3-La2O3 Addition. Key Eng. Mater. 226, 725–728 (2002)
Khodaei, M., Yaghobizadeh, O., Baharvandi, H.R., Esmaeeli, S., Javi, H.: The effect of Cr2O3 additions on sinterability and mechanical properties of liquid-phase sintered SiC ceramics. J. Alloys Compd. 829, 154501 (2020)
Eom, J.H., Seo, Y.K., Kim, Y.W., Lee, S.J.: Effect of additive composition on mechanical properties of pressureless sintered silicon carbide ceramics sintered with alumina, aluminum nitride and Yttria. Met. Mater. Int. 21, 525–530 (2015)
Kim, Y.W., Tanaka, H., Mitomo, M., Otani, S.: Influence of powder characteristics on liquid phase sintering of silicon carbide. J. Ceram. Soc. Jpn. 103, 257–261 (1995)
Gomez, E., Echeberria, J., Iturriza, I., Castro, F.: Liquid phase sintering of SiC with additions of Y2O3, Al2O3 and SiO2. J. Eur. Ceram. Soc. 24, 2895–2903 (2004)
He, Z., Tu, R., Katsui, H., Goto, T.: Synthesis of SiC/SiO2 core–shell powder by rotary chemical vapor deposition and its consolidation by spark plasma sintering. Ceram. Int. 39, 2605–2610 (2013)
Cho, K.S., Choi, H.J., Lee, J.G., Kim, Y.W.: Microstructure and fracture toughness of in-situ toughened SiC-TiC composites. J. Mater. Sci. Lett. 17, 1081–1084 (1998)
Cho, K.S., Kim, Y.W., Choi, H.J., Lee, J.G.: In situ-toughened silicon carbide-titanium carbide composites. J. Am. Ceram. Soc. 79, 1711–1713 (1996)
Cho, K.S., Kim, Y.W., Choi, H.J., Lee, J.G.: SiC-TiC and SiC-TiB2 composites densified by liquid-phase sintering. J. Mater. Sci. 31, 6223–6228 (1996)
Hui, Y., Lingjie, Z., Xingzhong, G., Xiaoyi, Z., Xiaojian, F.: Pressureless sintering of silicon carbide ceramics containing zirconium diboride. Ceram. Int. 37, 2031–2035 (2011)
Ahmoye, D., Dusan, D., Krstic, V.D.: Mechanical properties of reaction sintered SiC-TiC composite. Ceram. Int. 44, 14401–14407 (2018)
Liang, H., Yao, X., Zhang, H., Liu, X., Huang, Z.: The effect of TiC on the liquid phase sintering of SiC ceramics with Al2O3 and Y2O3 additives. Key Eng. Mater. 603, 197–201 (2014)
Dehghani, H., Khodaei, M., Yaghobizadeh, O., Ehsani, N., Baharvandi, H.R., Alhosseini, S.H.N., Javi, H.: The effect of AlN-Y2O3 compound on properties of pressureless sintered SiC ceramics-A review. Int. J. Refract. Met. H. (2020)
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Khodaei, M., Yaghobizadeh, O., Ehsani, N. et al. Improvement toughness of SiC ceramic by adding Cr2O3 and annealing process. J Aust Ceram Soc 57, 1097–1106 (2021). https://doi.org/10.1007/s41779-021-00608-y
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DOI: https://doi.org/10.1007/s41779-021-00608-y