Effect of High Boron Additive Content on SPS-Consolidation and Properties of Commercial Silicon Carbide Powder

• Published in: Glass and ceramics Vol. 75; no. 3-4; pp. 133 - 138
• Main Authors: Modin, S. Yu, Popova, N. A., Lebedeva, Yu. E., Chainikova, A. S., Grashchenkov, D. V., Osin, I. V., Lemeshev, D. O.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2018; Springer; Springer Nature B.V
• Subjects: Additives; Boron; Building materials; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Commercial buildings; Composites; Consolidation; Crack propagation; Gas turbine engines; Gas turbines; Glass; Hardness (Materials); Ionizing radiation; Materials Science; Natural Materials; Nuclear reactors; Plasma sintering; Powders (Particulate matter); Science for Ceramic Production; Silicon; Silicon carbide; Silicon carbides; Sintering; Spark plasma sintering; ceramic material; consolidation; silicon carbide; boron; spark plasma sintering
• ISSN: 0361-7610; 1573-8515
• DOI: 10.1007/s10717-018-0042-5

Consolidation of commercial silicon carbide powder was performed by means of spark plasma sintering. It is shown that mechanical preactivation is a promising method for introducing a high content of boron additives into silicon carbide. The effect of the boron-additive amount on sintering, microstructure, and properties of the ceramic material was studied. A ceramic showing promise for use as a structural material in nuclear reactors and gas-turbine engines was obtained on the basis of silicon carbide with boron weight content 10%, density 3.12 g/cm 3 , hardness 31.9 GPa, and crack resistance 5.65 MPa·m 1/2 .