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Composition consistency as a critical quality attribute for material extrusion additive manufacturing.
Laurel Hilger1, Alexandra Marnot2, Blair Brettmann1,2
1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA.
MRS Communications
|July 8, 2026
Summary
This study introduces composition consistency as a critical quality attribute for dense paste additive manufacturing (AM) inks. It offers a new framework for assessing the quality of material extrusion AM inks and processes.
Area of Science:
- Materials Science
- Manufacturing Engineering
- Chemical Engineering
Background:
- Additive manufacturing (AM) of dense pastes is gaining traction in various fields.
- Designing materials and processes for these heterogeneous systems is challenging.
- Current printability assessments focus on extrudability and shape retention, neglecting particle-binder separation.
Purpose of the Study:
- To establish composition consistency as a critical quality attribute for dense paste AM inks.
- To develop a framework for assessing the quality of material extrusion AM inks and processes.
- To address the issue of particle-binder separation in dense paste inks.
Main Methods:
- Focus on assessing composition consistency as a key quality attribute.
- Development of a framework for quality assessment.
- Evaluation of material extrusion AM inks and processes.
Main Results:
- Composition consistency is identified as a critical quality attribute for dense paste AM.
- A framework for quality assessment of AM inks and processes is proposed.
- The proposed framework addresses the susceptibility of inks to particle-binder separation.
Conclusions:
- Composition consistency is essential for reliable dense paste additive manufacturing.
- The developed framework enhances the quality assessment of material extrusion AM inks.
- This work provides a new perspective on ensuring ink integrity during AM processes.
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