Mechanical properties and thermal shock resistance performance of spark plasma sintered MgO–Al2O3–SiO2 ceramics. Issue 19 (1st October 2022)

• Record Type: Journal Article
• Authors: Peng, Zijun; Yuan, Lei; Luo, Xudong; Yu, Jingkun; Tian, Chen; Liu, Zhenli
• Is Part Of: Ceramics international. Volume 48:Issue 19(2022)Part A
• Page Start: 28548
• Page End: 28556
• Publication Date: 2022-10-01
• Subjects: MgO-Al2O3–SiO2 ceramics -- Spark plasma sintering -- Sintering behavior -- Mechanical properties -- Thermal shock resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.06.168
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: MgO–Al2 O3 –SiO2 composite ceramics were prepared by spark plasma sintering (SPS). In addition, phase composition, microstructure, mechanical properties, and thermal shock properties have been systematically characterized. Introduction of Al2 O3 and SiO2 significantly increased mechanical properties and thermal shock resistance of these composite ceramics. MgO–Al2 O3 –SiO2 composite ceramics prepared by spark plasma sintering (SPS) exhibited fine grain size. Reduced grain size may result in extraordinary properties. Experimental results showed that MgO–Al2 O3 –SiO2 composite ceramics had the highest flexural strength and hardness among all studied ceramics of 269.6 ± 9.22 MPa and 12.51 ± 0.29 GPa, respectively. Moreover, MgO–Al2 O3 –SiO2 composites can reach 16 thermal cycle times. This shows that it is feasible to prepare high-performance MgO composite ceramics by SPS. Furthermore, introduction of Al2 O3 and SiO2 is effective method to improve mechanical properties and thermal shock resistance of MgO composite ceramics.