In situ synthesis, mechanical properties, and oxidation resistance of (SiC+ZrB2)/Zr3[Al(Si)]4C6 composites. (September 2016)

• Record Type: Journal Article
• Authors: Yu, Lei; Pan, Limei; Yang, Jian; Feng, Yongbao; Zhang, Jingxian; Qiu, Tai
• Is Part Of: Corrosion science. Volume 110(2016)
• Page Start: 182
• Page End: 191
• Publication Date: 2016-09
• Subjects: A. Ceramic matrix composites -- B. SEM -- B. XRD -- C. Oxidation; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.04.037
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: In situ (SiC + ZrB2 )/Zr3 [Al(Si)]4 C6 composites with different SiC content were prepared. SiC and ZrB2 show significant strengthening and toughening effect to the matrix. The oxidation kinetics of the composites follows a parabolic law during oxidation at 1000–1300 °C. With the increase of SiC, the oxidation resistance of the composites is improved remarkably. Abstract: In situ (SiC+ZrB2 )/Zr3 [Al(Si)]4 C6 composites with 0–15 vol.% SiC and 15 vol.% ZrB2 were prepared. As reinforcements, the incorporation of SiC and ZrB2 shows significant strengthening and toughening effect by the synergistic action of mechanisms including particulate reinforcement, grain-refinement, and grain's pull-out, etc. The oxidation kinetics of the composites at 1000–1300 °C in air follows a parabolic law. With the incorporation and increase of SiC, the oxidation resistance of the composites is improved remarkably. It is attributed to the formation of a protective oxide scale containing borosilicate glass and more mullite, which effectively prevents the inward diffusion of oxygen.