scholarly journals Ceramic Binder Jetting Additive Manufacturing: A Literature Review on Density

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Wenchao Du ◽  
Xiaorui Ren ◽  
Zhijian Pei ◽  
Chao Ma
Keyword(s):  
Additive Manufacturing ◽  
Review Paper ◽  
Measurement Methods ◽  
Current Status ◽  
Knowledge Gaps ◽  
Ceramic Binder ◽  
Part Density ◽  
Preparation Techniques ◽  
Material Preparation ◽  
Binder Jetting

Abstract The objective of this review paper is to summarize the current status and identify the knowledge gaps in ceramic binder jetting additive manufacturing, with a particular focus on density. This paper begins with an overview of ceramic binder jetting. Then, it discusses different aspects of density, including various terminologies, measurement methods, and achieved values. Afterward, it reviews two categories of techniques to increase the part density: material preparation techniques (powder granulation, mixing powders of different sizes, using slurry feedstock, and mixing different materials) and postprocessing techniques (sintering, chemical reaction, infiltration, and isostatic pressing). Finally, it presents the knowledge gaps in the literature.

scholarly journals Ceramic binder jetting additive manufacturing: Effects of granulation on properties of feedstock powder and printed and sintered parts

2020 ◽  
Vol 36 ◽  
pp. 101542 ◽  
Author(s):  
Guanxiong Miao ◽  
Wenchao Du ◽  
Mohammadamin Moghadasi ◽  
Zhijian Pei ◽  
Chao Ma
Keyword(s):  
Additive Manufacturing ◽  
Feedstock Powder ◽  
Ceramic Binder ◽  
Binder Jetting

Ceramic binder jetting additive manufacturing: Effects of particle size on feedstock powder and final part properties

2020 ◽  
Vol 46 (10) ◽  
pp. 16966-16972 ◽  
Author(s):  
Mohammadamin Moghadasi ◽  
Wenchao Du ◽  
Ming Li ◽  
Zhijian Pei ◽  
Chao Ma
Keyword(s):  
Particle Size ◽  
Additive Manufacturing ◽  
Final Part ◽  
Feedstock Powder ◽  
Ceramic Binder ◽  
Binder Jetting

Binder Jetting Additive Manufacturing of Ceramics: Analytical and Numerical Models for Powder Spreading Process

2019 ◽  
Author(s):  
Guanxiong Miao ◽  
Wenchao Du ◽  
Zhijian Pei ◽  
Chao Ma
Keyword(s):  
Additive Manufacturing ◽  
Numerical Models ◽  
Ceramic Materials ◽  
Low Density ◽  
Forming Process ◽  
Spreading Process ◽  
Powder Bed ◽  
Complex Shapes ◽  
Part Density ◽  
Binder Jetting

Abstract Binder jetting additive manufacturing is a promising way to process ceramic materials which are hard to be manufactured into complex shapes using conventional methods. However, the application of binder jetting is limited by the relatively low density of manufactured parts. Powder bed forming process is a critical step that determines the powder bed density and consequently the part density. Thus, investigating and understanding the power spreading process is necessary to improve the part density. A numerical model is developed to predict the powder bed density under different spreading conditions using the discrete element method (DEM). The predicted DEM results are compared with the prediction of an analytical model. The results show that under different layer thicknesses (50 μm, 70 μm, 100 μm) and roller diameters (12 mm, 14 mm, and 16 mm), the predicted maximum powder bed density by these two models has nearly the same value and the predicted maximum packing stress has the same trend.

Binder Jetting Additive Manufacturing of Ceramics: Comparison of Flowability and Sinterability Between Raw and Granulated Powders

2019 ◽  
Author(s):  
Wenchao Du ◽  
Guanxiong Miao ◽  
Lianlian Liu ◽  
Zhijian Pei ◽  
Chao Ma
Keyword(s):  
Additive Manufacturing ◽  
Flow Rate ◽  
Freeze Drying ◽  
Volumetric Flow Rate ◽  
Hausner Ratio ◽  
Spray Freeze Drying ◽  
Material Preparation ◽  
Binder Jetting ◽  
High Flowability

Abstract The objective of this study is to compare three different feedstock powders for the binder jetting process by characterizing their flowability and sinterability. Binder jetting additive manufacturing is a promising technology for fabricating ceramic parts with complex or customized geometries. Granulation is a promising material preparation method due to the potential high sinterability and flowability of the produced powder. However, no study has been made to systematically compare raw and granulated powders in terms of their flowing and sintering behaviors. This paper aims at filling this knowledge gap. Two raw powders (i.e., fine raw powder of 300 nm and coarse raw powder of 70 μm) and one granulated powder from spray freeze drying were compared. Different flowability metrics, including volumetric flow rate, mass flow rate, Hausner ratio, Carr index, and repose angle were measured. Different sinterability metrics, including sintered bulk density, volume shrinkage, and densification ratio were compared for all three powders. Results show that granulated powder achieved comparably high flowability to that of the coarse raw powder and also comparably high sinterability to that of the fine raw powder. Moreover, suitable metrics for the characterization of the sinterability and flowability for these three powders are recommended. This study suggests spray freeze drying produces high-quality feedstock powder for binder jetting process.

scholarly journals A Review on Additive Manufacturing of Pure Copper

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 740
Author(s):  
Qi Jiang ◽  
Peilei Zhang ◽  
Zhishui Yu ◽  
Haichuan Shi ◽  
Di Wu ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Physical Properties ◽  
Industrial Development ◽  
Pure Copper ◽  
Development Trend ◽  
High Heat ◽  
Current Status ◽  
Selective Electron Beam Melting ◽  
Traditional Processing ◽  
Electrical Components

With the development of the aerospace and automotive industries, high heat exchange efficiency is a challenge facing the development of various industries. Pure copper has excellent mechanical and physical properties, especially high thermal conductivity and electrical conductivity. These excellent properties make pure copper the material of choice for the manufacture of heat exchangers and other electrical components. However, the traditional processing method is difficult to achieve the production of pure copper complex parts, so the production of pure copper parts through additive manufacturing has become a problem that must be overcome in industrial development. In this article, we not only reviewed the current status of research on the structural design and preparation of complex pure copper parts by researchers using selective laser melting (SLM), selective electron beam melting (SEBM) and binder jetting (BJ) in recent years, but also reviewed the forming, physical properties and mechanical aspects of pure copper parts prepared by different additive manufacturing methods. Finally, the development trend of additive manufacturing of pure copper parts is also prospected.

scholarly journals REVIEW OF DESIGN HEURISTICS AND DESIGN PRINCIPLES IN DESIGN FOR ADDITIVE MANUFACTURING

2021 ◽  
Vol 1 ◽  
pp. 2571-2580
Author(s):  
Filip Valjak ◽  
Angelica Lindwall
Keyword(s):  
Additive Manufacturing ◽  
Design Process ◽  
Research Question ◽  
Design Principles ◽  
Current Status ◽  
Design For Additive Manufacturing ◽  
Design Heuristics ◽  
Similarities And Differences ◽  
Definition Of ◽  
Support Methods

AbstractThe advent of additive manufacturing (AM) in recent years have had a significant impact on the design process. Because of new manufacturing technology, a new area of research emerged – Design for Additive Manufacturing (DfAM) with newly developed design support methods and tools. This paper looks into the current status of the field regarding the conceptual design of AM products, with the focus on how literature sources treat design heuristics and design principles in the context of DfAM. To answer the research question, a systematic literature review was conducted. The results are analysed, compared and discussed on three main points: the definition of the design heuristics and the design principles, level of support they provide, as well as where and how they are used inside the design process. The paper highlights the similarities and differences between design heuristics and design principles in the context of DfAM.

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