Synergic effects of nano carbon sources on thermal shock resistance of Al2O3-C refractories
Source abstract
Abstract
Abstract The fracture behavior and thermal shock resistance of low-carbon containing Al 2 O 3 -C refractories with various nano carbon sources were comparatively investigated by means of three-point bending test and wedge splitting test. The results show that synergic enhancing mechanisms, including “pull-out”, “crack bridging”, “crack deflection” and “crack branching”, can be developed with the application of multiple nano carbon sources. Therefore, the carbon black, expanded graphite, in-situ multi-walled carbon nanotubes and SiC whiskers containing Al 2 O 3 -C refractories have the highest residual strengths of 11.16 MPa. Furthermore, the wedge splitting test results suggest that the improvement of thermal shock resistance is mainly associated with an increase of crack propagation resistance, which can be fulfilled through decreasing the brittleness and inducing tortuous crack propagation along grain/matrix. Additionally, it is demonstrated that the wedge splitting test after thermal shock treatment should be a feasible way to evaluate the thermal shock cycling resistance of Al 2 O 3 -C refractories.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Velocity Impact and Material Behavior · Boron and Carbon Nanomaterials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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