Microstructure and properties of hot pressed Zr2(Al(Si))4C5/SiC composites

Preparation and characterization of mullite-silicon carbide heat absorbing ceramics for solar thermal tower plant

“…With the operating temperature increasing, the specific heat capacity and heat capacity increase, while the thermal diffusion and thermal conductivity decrease, which agrees with the research of Manish Patel [19] and Guiqing Chen [20] . At microcosmic level, higher temperature is always accompanied by bigger vibrational energy and faster vibration velocity of phonons, which increases the collision frequency between phonons and reduces the mean free path, thus resulting in lower thermal conductivity.…”

Microstructure, Mechanical, and Thermal Properties of (ZrB2 + ZrC)/Zr3[Al(Si)]4C6 Composite

“…Incorporation of an appropriate second phase is an effective way to overcome these weaknesses. To date, there have been few studies carried out to improve the comprehensive performance of Zr 2 [Al(Si)] 4 C 5 by incorporating SiC . In recent years, a synergistic mechanism between two or more strengthening and toughening phase/methods in ceramic‐matrix composites has been reported, which can further enhance the composite strength and toughness over a singular strengthening method.…”

Microstructure, mechanical, thermal, and oxidation properties of a Zr2[Al(Si)]4C5–SiC composite prepared by in situ reaction/hot-pressing

“…[1][2][3][4][5][6][7][8] Furthermore, the Young's modulus of Zr 2 [Al(Si)] 4 C 5 decreases slowly with increasing temperature and at 1580 • C it remains 81% of that at ambient temperature. 2 However, the hardness of Zr 2 [Al(Si)] 4 C 5 is about half that of ZrC and the fracture toughness is only 3.88 ± 0.16 MPa m 1/2 , which is much lower than other ternary layered carbides, such as Ti 3 SiC 2 and Ti 3 AlC 2 .…”

“…[15][16][17] It is expected that both the mechanical properties and oxidation resistance of Zr 2 [Al(Si)] 4 C 5 can be improved by incorporating SiC particles. Recently, Chen et al 6 fabricated Zr 2 [Al(Si)] 4 C 5 -SiC composites using as-synthesized Zr 2 [Al(Si)] 4 C 5 powders and SiC powders as starting materials. The mechanical properties (flexural strength, fracture toughness and Vickers hardness), thermal properties (thermal conductivity and specific heat capacity) as well as ultrahigh-temperature oxidation resistance of the composites were superior to those of Zr 2 [Al(Si)] 4 C 5 .…”

“…The mechanical properties (flexural strength, fracture toughness and Vickers hardness), thermal properties (thermal conductivity and specific heat capacity) as well as ultrahigh-temperature oxidation resistance of the composites were superior to those of Zr 2 [Al(Si)] 4 C 5 . 6,8 In situ processing, typically consisting of chemical reactions and consolidation in one step, has been widely used for the preparation of ceramic composites. Previous studies 14 on Ti 3 SiC 2 -SiC composites demonstrated that this method had many advantages including good microstructural controllability, low contamination, short processing time, decrement in processing temperature and reduction of cost.…”