Abstract
In order to achieve the purpose of resource and energy saving in the process of producing ceramics products, the hollow lightweight load bearing board in thermal environment with topological structures was made by 3D printing. In this study, the load bearing board manufactured with different topological structures such as vertical grid, oblique square grid, and honeycomb grid was printed by direct ink writing technology using the same raw material of kaolin clay and α‐Al2O3 powder. The three kinds of samples were sintered at 1450°C × 3 h. The effect of printed structures on mechanical property of load bearing board samples was investigated. Moreover, the finite element simulation was used to study the stress distribution of the load bearing board. Comparing with results obtained by three kinds of samples, honeycomb grid supported samples proved to be the most appropriate structure in various directions comprehensively.
Highlights
Lightweight structures enable a required technical functionality at lower weight than those generally achievable by other ways
3.1. ermal Decomposition and Sintering of the Green Parts. e mullite ceramic raw materials used in DIW 3D printing technology were analyzed by TG-DSC at a heating rate of 10°C/min, as shown in Figure 3. e TG-DSC curve was obtained for slurry used for printing. ere were three endothermic peaks at 97.2°C, 497.2°C, and 571.3°C and one exothermic peak at 989.2°C in Figure 3, respectively
Around the peak at 97.2°C, about 1.09% of mass loss was produced at the first stage from the room temperature to 200°C because the physically adsorbed water was removed from the sample; around the peak at 497.2°C, a contribution to 3.69% of mass loss was caused by the kaolinite mineral dehydroxylation, forming metakaolin, which consists of the kaolinite lattice after the removal of most of the hydroxyl groups [16]. e α to β phase transition of quartz in the raw materials occurred at the temperature of 571.3°C [17]
Summary
Lightweight structures enable a required technical functionality at lower weight than those generally achievable by other ways. Lightweight load bearing board can be achieved in two aspects: using lightweight materials or adopting a lighter structure. E development of 3D printing technology provides conditions for the study of lightweight structures of the load bearing board. Eckel et al studied the structures by fabricating microlattice and honeycomb structures with polymer-derived ceramics using SLA 3D printing technology and the structures obtained compressive strength as high as 163.3 MPa [7]. Biranchi et al studied the effects of the design parameters on the mechanical property of honeycomb cellular structures printed by fused deposition modelling (FDM) process. In order to realize lightweight structure of load bearing board, samples of load bearing board supported with different topological structures such as vertical grid, oblique square grid, and honeycomb grid were printed by DIW 3D printing technology to replace the completely solid load bearing board using kaolin as raw material. The finite element simulation was used to study the damage mechanism of the load bearing boards
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