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Flexural strength and toughness of liquid phase sintered silicon carbide

TitleFlexural strength and toughness of liquid phase sintered silicon carbide
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2000
AuthorsMagnani, G., Minoccari G.L., and Pilotti L.
JournalCeramics International
Volume26
Pagination495-500
ISSN02728842
KeywordsBending (deformation), Bending strength, Bubble formation, Cavitation, Ceramic materials, Four-point bend tests, Fracture toughness, Liquid phase sintering, Load testing, Mechanical variables measurement, oxidation, Silicon carbide, Sintering, Thermal effects, Vickers hardness testing
Abstract

Liquid phase sintering process of silicon carbide allows the obtaining of a dense sample at lower temperature than the solid state process with reduced grain growth and improved mechanical properties. In this paper mechanical properties at RT (room temperature) and at high temperature of liquid phase sintered silicon carbide (LPSSC) was determined. Flexural strength measurements were conducted by means of four-point bend tests in the range RT-1400 °C. Hardness and fracture toughness were determined by Vickers indentation method at different load. Flexural strength changed from 532 MPa at RT to 240 MPa at 1400 °C. SEM analysis showed that this behaviour is due to superficial oxidation of SiC and formation of yttrium silicate which create bubbles and cavities. © 2000 Elsevier Science Ltd and Techna S.r.l.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0033686782&doi=10.1016%2fS0272-8842%2899%2900084-X&partnerID=40&md5=26b580e07cb4480ac7874c31622970e2
DOI10.1016/S0272-8842(99)00084-X
Citation KeyMagnani2000495