Long-sized rods of Al2O3–SiC–TiB2 ceramic composite material obtained by SHS-extrusion: Microstructure, X-ray analysis and properties. Issue 20 (15th October 2021)

• Record Type: Journal Article
• Authors: Bazhin, Pavel; Chizhikov, Andrey; Stolin, Alexander; Antipov, Mikhail; Konstantinov, Alexander
• Is Part Of: Ceramics international. Volume 47:Issue 20(2021)
• Page Start: 28444
• Page End: 28448
• Publication Date: 2021-10-15
• Subjects: A extrusion -- B composites -- D Al2O3; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.06.262
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Long-sized rods of Al2 O3 –SiC–TiB2 ceramic composite material were obtained by SHS-extrusion. The material was synthesized by self-propagating high-temperature synthesis (SHS) followed by high-temperature shear deformation. Ceramic samples app up to 465 mm in length and 5 mm in diameter were obtained. According to the results of XRD and SEM the obtained rods have a composite structure. The matrix is Al2 O3 with distributed titanium diboride and silicon carbide particles. A uniform phase distribution was observed along the entire length of the rod. The microhardness of the matrix was 25–26 GPa, that of the dispersion-strengthening phases - 32–34 GPa. Heat resistance tests showed that during heat treatment at T = 1000 °C for 21 h, the sample specific weight gain and its real rate were 8.3 g/m 2 and 1 g/(m 2 ∙h), respectively. The density, hardness and electrical resistivity of the samples obtained in this work were 3.27 g/cm 3, 19.5 GPa, 3.1∙10 −5 Ohm∙m, respectively.