Influence of Silicon Carbide on Direct Powder Bed Selective Laser Process (Sintering/Melting) of Alumina
Year: 2022
Type: article
Abstract: The powder bed selective laser process (sintering/melting) has revolutionised many industries, including aerospace and biomedicine. However, PBSLP of ceramic remains a formidable challenge. Here, we present a unique slurry-based approach for fabricating high-strength ceramic components instead of traditional PBSLP. A special PBSLP platform capable of 1000 °C pre-heating was designed for this purpose. In this paper, PBSLP of Al2O3 was accomplished at different SiC loads up to 20 wt%. Several specimens on different laser powers (120 W to 225 W) were printed. When the SiC content was 10 wt% or more, the chemical interaction made it difficult to process. Severe melt pool disturbances led to poor sintering and melting. The structural analysis revealed that the micro-structure was significantly affected by the weight fraction of SiC. Interestingly, when the content was less than 2 wt%, it showed significant improvement in the microstructure during PBSLP and no effects of LPS or chemical interaction. Particularly, a crack pinning effect could be clearly seen at 0.5 wt%.
Source: Materials
DOI: 10.3390/ma15020637
Institutions: Gazi University, Nanjing University of Science and Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,408
Funders: European Commission, National Natural Science Foundation of China, Government of Jiangsu Province, Università degli Studi di Trento, China Scholarship Council, Natural Science Foundation of Jiangsu Province, Nanjing University of Science and Technology, Nanjing University, Priority Academic Program Development of Jiangsu Higher Education Institutions, Horizon 2020 Framework Programme, Chinese Government Scholarship
OpenAlex ID: W4206630294