High-performance ceramic parts with complex shape prepared by selective laser sintering: a review

Abstract

Selective laser sintering (SLS) is an additive manufacturing technology which has shown great advantages in direct formation of the polymer, metal and their composites. However, ceramic parts prepared by the SLS still exhibit some fatal defects, including low density and poor mechanical properties. In this respect, recent advances for preparing ceramics have improved the final density and performance by adopting post-processing methods. In this review, three commonly used powder preparation approaches (i.e. mechanical mixing, solvent evaporation and dissolution-precipitation process) and two powder sintering mechanisms for the SLS are introduced. Porous ceramic parts are prepared directly through the SLS by virtue of their high porosity. And dense, high-performance Al 2 O 3 , ZrO 2 , kaolin and SiC ceramic parts with complex shape are prepared by introducing CIP technology into the SLS, indicating that the hybrid technology could be the promising route for preparing highperformance ceramic parts used in various fields.

Materials research & measurement needs for ceramics additive manufacturing

“…In this connection, we note recently published reviews that have specifically included how post-processing steps should be integrated in the overall AM build. 70,71 As the next step, forming working groups and collaborative task forces focused on the evaluation of databases, standards, and best practices is warranted. Likewise, it could be of significant importance to hold biennial or triennial scientific and technical meetings dedicated to ceramics AM.…”

Additive manufacturing of lightweight and high-strength polymer-derived SiOC ceramics

“…Second, it can realise the flexible design and manufacture of structural parts with complex shapes, breaking the limitations of the form in traditional ceramic processing technology, and third, it makes personalised designs and structures feasible, to meet the needs of different groups. At present, the main techniques for the additive manufacturing of ceramic parts are as follows: vat photopolymerisation, such as stereolithography (SL) (Jacobs 1992;Chen et al 2010), material jetting, such as inkjet printing (IJP) (Derby 2011;Tan, Tran, and Chua 2016;Saengchairat, Tran, and Chua 2017;Chen, Ouyang, et al 2018), and binder jetting , material extrusion (Tian et al 2017), such as fused deposition manufacturing (FDM) (Danforth 2016;Cano et al 2019) and direct ink writing (DIW) Elsayed et al 2019), powder bed fusion, such as selective laser sintering (SLS) (Yuan, Shen, et al 2019;Chen, Wu, et al 2018) and selective laser melting (SLM) (Minasyan et al 2018;Chen, Li, Wu, et al 2019;Yu et al 2019), and binder jetting, such as three dimensional printing Huang et al 2019). Digital-light-processing (DLP) (Felzmann et al 2012;Mei et al 2019), as a derivative technology of stereolithography, is capable of curing a whole layer in one time period without the need for a laser light source, yet maintaining the high accuracy and surface quality of SL, which can greatly advance printing efficiency and reduce production costs at the same time.…”

An investigation of post treatment on properties and structure of ultrahigh molecular weight polyethylene parts prepared by selective laser sintering for biomedical application

“…However, neither of these two methods are reliable enough for the biosafety of materials when used in clinical applications. For metal or ceramic materials, post treatment methods of sintered specimens mainly rely on the dual effects of temperature and isostatic pressure . Shahzad et al combined polypropylene and Al 2 O 3 powder for SLS, a final density of 89% was improved after warm isostatically pressed treatment …”