Continuous SiC fibers-ZrB2 composites. Issue 16 (December 2015)

• Record Type: Journal Article
• Authors: Zoli, L.; Medri, V.; Melandri, C.; Sciti, D.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 16(2015:Dec.)
• Page Start: 4371
• Page End: 4376
• Publication Date: 2015-12
• Subjects: ZrB2 -- SiC fibers -- Ceramic matrix composites -- Infiltration -- Sintering -- UHTC—CMC; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.08.008
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: ZrB2 —continuous SiC fiber composites were prepared by vacuum-bag infiltration and hot pressing, using SiC fabric preforms. Vacuum bag infiltration was effective when unidirectional fiber layers in a 0–90° architecture were infiltrated with an aqueous ZrB2 -rich slurry. Sintering was carried out at temperatures between 1450 and 1600 °C to study the effect on densification and microstructural features. With a fiber content of around 50 vol%, the composites had a density of 4 g/cm 3 and final porosities lower than 10 vol%. Flexural strength was measured at room and high temperature in air. Irrespective of the processing temperature, strength values were 150–170 MPa up to 1200 °C and 110 MPa at 1500 °C. Short-term oxidation tests were conducted at 1650 °C in a bottom-up furnace.