The effect of graphene reinforcement on the mechanical properties of Al2O3 ceramics rapidly sintered by high-frequency induction heating

Toughening mechanisms and mechanical properties of graphene nanosheet-reinforced alumina

“…In this context, both CNT and GNS are originated from graphitic structure, and they should behave in a similar manner in terms of chemical activity. Perhaps provision of long hours of reaction spells during hot-pressing or pressure-free sintering allows sufficient time for the Al 2 O 3 /CNT interface to form an intermediate phase through slow material diffusion mechanism [12,14]; whereas the HFIHS process works on fast sintering leaving the materials very little or almost no time to diffuse [29][30][31]. Furthermore, the well-bonded GNS with Al 2 O 3 is clearly visible in the HR-TEM image in Fig.…”

“…Unlike mass diffusion and substantial material transportation across grain boundaries as in case of prolonged conduction heat sintering cycles, the HFHIS process relies on Joule heating principle causing creep and localized densification with nominal diffusion/material transportation mechanism [29,30]. Thus far, the exploration of this promising processing route for Al 2 O 3 /graphene nanocomposites is, however, scarce [31].…”

Investigation of the Mechanical Properties and Microstructure of Graphene Nanoplatelet-Cement Composite

“…In addition, the special surface area of graphene can theoretically reach up to 2630 m 2 /g [12], which provides more potential sites for surface adsorption or other interactions between graphene and cement. In the last several years, graphene has been applied to polymers, ceramics or rubbers [13,14,15] as a reinforcing material. Meanwhile, the introduction of graphene into cementitious materials has attracted the comprehensive attention of many researchers and engineers.…”

Effect of talc and titania on the microstructure and mechanical properties of alumina ceramics

“…However, Al 2 O 3 has a high melting point of 2050°C and its sintering temperature is normally higher than 1500°C. Moreover, Al 2 O 3 ceramics are brittle and of crack sensitivity owing to low toughness . Therefore, it is of great importance and a challenge to reduce the sintering temperature of Al 2 O 3 ceramics to save energy and enhance the comprehensive mechanical performance.…”

“…Moreover, Al 2 O 3 ceramics are brittle and of crack sensitivity owing to low toughness. 3 Therefore, it is of great importance and a challenge to reduce the sintering temperature of Al 2 O 3 ceramics to save energy and enhance the comprehensive mechanical performance. Usually, there are three approaches available to reduce the sintering temperature of Al 2 O 3 ceramics, using superfine raw material, 4 adding sintering aids, 5 and employing special sintering method.…”