Powder Injection Moulding (PIM) of Mesophase Carbon with Water-Based Binders

2006 ◽  
Vol 45 ◽  
pp. 711-713 ◽  
Author(s):  
Michael Gruhl ◽  
B. Derfuss ◽  
Christian Rottmair ◽  
Andreas Volek ◽  
Robert F. Singer
Keyword(s):  
Mechanical Properties ◽  
Injection Moulding ◽  
Gelling Agent ◽  
Powder Injection ◽  
High Porosity ◽  
Heating Rates ◽  
Powder Injection Moulding ◽  
Water Based ◽  
High Heating ◽  
Complex Parts

Since there are no net-shape techniques for complex parts made of mesophase carbon available yet, this work focuses on a powder injection moulding (PIM) approach. The single biggest problem to overcome here is the overlap of debindering and pyrolysis/sintering of mesocarbon when using conventional binders, causing high porosity and cracks. Water-based binders with agar as gelling agent can avoid this problem effectively by removing the binder in an optimized drying step. The subsequent sintering can then be carried out at high heating rates, leading to better densification and good mechanical properties. Furthermore, the dependency of the rheological properties of the water-based feedstock on its water content is investigated.

Powder Injection Moulding (PIM) of Mesophase Carbon with Water-Based Binders

2006 ◽  
pp. 711-713
Author(s):  
Michael Gruhl ◽  
B. Derfuss ◽  
Christian Rottmair ◽  
Andreas Volek ◽  
Robert F. Singer
Keyword(s):  
Injection Moulding ◽  
Powder Injection ◽  
Powder Injection Moulding ◽  
Water Based

scholarly journals SS 316L/HA composite via powder injection moulding: Mechanical and physical properties

2019 ◽  
Vol 13 (3) ◽  
pp. 5480-5492
Author(s):  
N. A. Johari ◽  
F. R. M. Romlay ◽  
W. S. W. Harun
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Injection Moulding ◽  
Powder Injection ◽  
Stainless Steel 316L ◽  
Bony Tissue ◽  
Powder Injection Moulding ◽  
Mechanical And Physical Properties

The bio-active and biological affinity with bony tissue effect of hydroxyapatite (HA) marks as a chosen material for implants application. Uniting HA which has low mechanical properties that limit its application with a higher mechanical property of metallic biomaterial 316L stainless steel (316L) to form a biocomposite have been a solution to produce acceptable mechanical properties for human implant. The 316L/HA biocomposite would have attribute vital to current implant materials, like a low Young’s modulus, high compatibility, and bio-inertness. This study concentrates on investigating the mechanical and physical properties of the 316L/HA biocomposite fabricated by metal injection moulding. The synthesis HA was produced from calcium-Phosphate. While, Polypropylene (PP), Stearin Acid (SA) and primary binder, Paraffin wax (PW) used as a binder system. Different weight of HA (0, 5, 10 and 15 wt. %) ratios to SS 316L/HA were prepared. All samples were sintered at 1350 ºC for 2 hours soaking time. The result shows that 10 wt.% HA biocomposite and above have higher porosity and low mechanical strength. However, 5 wt.% HA biocomposite has a high relative density which 87.95% compared to other additive HA % and hardness 127.10 Hv. The Tensile strength and elongation of 316L/HA biocomposite exhibit decreased as the content of HA wt.% increase which similar properties with the human bone that lower than 130 MPa (tensile strength). Therefore, 5 wt.% HA biocomposite is found to be the most excellent powder ratio for 316L/HA biocomposite regarding mechanical and physical properties and to achieve the mechanical strength of the biocomposite is necessary an amount of HA content in the composite are smaller than 15 wt.%.  

scholarly journals Microstructure, magnetic and mechanical properties of Ni–Zn ferrites prepared by powder injection moulding

2011 ◽  
Vol 210 (1) ◽  
pp. 29-35 ◽  
Author(s):  
J. Gutiérrez-López ◽  
E. Rodriguez-Senín ◽  
J.Y. Pastor ◽  
M.A. Paris ◽  
A. Martín ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Injection Moulding ◽  
Powder Injection ◽  
Powder Injection Moulding

Comparing fast inductive tempering and conventional tempering: Effects on microstructure and mechanical properties

2018 ◽  
Vol 115 (4) ◽  
pp. 407 ◽  
Author(s):  
Annika Eggbauer Vieweg ◽  
Gerald Ressel ◽  
Peter Raninger ◽  
Petri Prevedel ◽  
Stefan Marsoner ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Energy ◽  
Charpy Impact ◽  
Heat Treating ◽  
Processing Route ◽  
High Heating Rate ◽  
Heating Rates ◽  
High Heating ◽  
Tempering Treatment ◽  
Carbide Distribution

Induction heating processes are of rising interest within the heat treating industry. Using inductive tempering, a lot of production time can be saved compared to a conventional tempering treatment. However, it is not completely understood how fast inductive processes influence the quenched and tempered microstructure and the corresponding mechanical properties. The aim of this work is to highlight differences between inductive and conventional tempering processes and to suggest a possible processing route which results in optimized microstructures, as well as desirable mechanical properties. Therefore, the present work evaluates the influencing factors of high heating rates to tempering temperatures on the microstructure as well as hardness and Charpy impact energy. To this end, after quenching a 50CrMo4 steel three different induction tempering processes are carried out and the resulting properties are subsequently compared to a conventional tempering process. The results indicate that notch impact energy raises with increasing heating rates to tempering when realizing the same hardness of the samples. The positive effect of high heating rate on toughness is traced back to smaller carbide sizes, as well as smaller carbide spacing and more uniform carbide distribution over the sample.

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