Powder-bed 3D printing by selective activation of magnesium phosphate cement: Determining significant processing parameters and their effect on mechanical strength

被引:0
|
作者
Salari, Farid [1 ]
Zocca, Andrea [2 ]
Bosetti, Paolo [1 ]
Hlavacek, Petr [3 ]
Italiano, Antonino [4 ]
Gobbin, Filippo [5 ]
Colombo, Paolo [5 ]
Kuhne, Hans-Carsten [3 ]
Sglavo, Vincenzo M. [1 ,6 ]
机构
[1] Univ Trento, Dept Ind Engn, via Sommar 9, I-38123 Trento, Italy
[2] Bundesanstalt Mat Forsch & Prufung BAM, Div Adv Multimat Proc, Unter Eichen 44-46, D-12203 Berlin, Germany
[3] Bundesanstalt Mat Forschung & Prufung BAM, Div Technol Construct Mat, Unter Eichen 87, D-12205 Berlin, Germany
[4] Desamanera Srl, Rovigo, Italy
[5] Univ Padua, Dept Ind Engn, Padua, Italy
[6] INSTM, Trento Res Unit, via G Giusti 9, I-50121 Florence, Italy
来源
OPEN CERAMICS | 2024年 / 18卷
关键词
Binder jetting; Concrete; 3D-printing; Particle-bed binder jetting; Design of experiment; Process parameters; COMPONENTS;
D O I
10.1016/j.oceram.2024.100609
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The present work addresses powder bed binder jetting additive manufacturing by selective magnesium phosphate cement activation. Despite the potential of this technology to aid the digitalization of the construction industry, the effect of processing parameters on the mechanical performance of printed materials has not yet been studied to generate a guideline for the further development of the technology. Statistical methodologies were used to screen the effect of four printing process parameters (printing speed, layer thickness, raster angle, and build direction on flexural and compressive strength). As the exploited technology works with constant fluid pressure, the physical interpretation of the effect of each factor can be considered taking into account the interactions between the binder materials in the powder bed. Analysis of variance (ANOVA) indicated that printing speed and layer thickness significantly affect mechanical performances. Furthermore, the layout of samples for the printing process is preferable to be parallel the printhead movement. An anisotropic behavior was observed, and the samples subjected to compressive forces parallel to the layer plane possessed lower strength values. This effect can be interpreted as a result of a weak area of low density in between layers, leading to a pronounced delamination under compression. Even though the strength of the printed material is not suitable for a structural concrete, it can be marginally improved by design of experiment and optimized for non-structural applications, such as for porous artificial stone. Design of experiment coupled with ANOVA methods can be used in the future to support the development of novel material mixtures, thus expanding the fields of application of this novel additive manufacturing technology.
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页数:11
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