Effect of supercritical CO 2 aging on the microstructural and fracture properties of 3D-printed PEEK
Source abstract
Abstract
Three-dimensional (3D) printing is revolutionizing the oil and gas (O&G) industry by enabling the rapid, on-site production of complex and customized components. However, the long-term stability of 3D-printed materials in supercritical CO 2 (scCO 2 ), such as those in carbon capture and storage applications, remains unclear. This study investigates the effects of scCO 2 aging on the microstructural and fracture properties of 3D-printed polyether ether ketone (PEEK). After scCO 2 exposure, weight and density of the samples increased because of diffusion, which filled the voids. A slight increase in crystallinity was observed after aging, indicating minor improvements in structural ordering. Although the mechanical strength and modulus of the samples remained unchanged after aging, hardness increased by 10%, owing to void reduction on the sample surface. Despite these slight changes, fracture toughness considerably decreased by 22% after aging, which was attributed to a more heterogeneous void distribution and the formation of microvoids within the printed layers of aged samples, in contrast to the more localized voids at the interfaces in the pristine samples.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Polymer Foaming and Composites · Additive Manufacturing and 3D Printing Technologies · Polymer crystallization and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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