Effect of nanoparticles in bimodal powder on physical and mechanical properties of powder injection molded parts

Powder injection molding (PIM) process was applied to Fe-based metamorphic alloy powders, and microstructure, hardness, and wear resistance of the PIM products were analyzed and compared with those of conventional PIM stainless steel products. When Fe-based metamorphic powders were injection-molded and then sintered at 1200 oC, completely densified products with almost no pores were obtained. They contained 34 vol.% of (Cr,Fe)2B borides dispersed in the austenitic matrix without amorphous phases. Since these (Cr,Fe)2B borides were very hard and thermally stable, hardness, and wear resistance of the PIM products of Fe-based metamorphic powders were twice as high as those of conventional PIM stainless steel products. Such property improvement suggested new applicability of the PIM products of Fe-based metamorphic powders to structures and parts requiring excellent mechanical properties.

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Deposition-induced effects of isotactic polypropylene and polycarbonate composites during fused deposition modeling

Rapid Prototyping Journal ◽

10.1108/rpj-12-2015-0189 ◽

2017 ◽

Vol 23 (5) ◽

pp. 869-880 ◽

Cited By ~ 19

Author(s):

Ying-Guo Zhou ◽

Bei Su ◽

Lih-sheng Turng

Keyword(s):

Mechanical Properties ◽

Design Methodology ◽

Fused Deposition Modeling ◽

Content Type ◽

Fused Deposition ◽

Close Relationship ◽

Molded Parts ◽

Deposition Modeling ◽

Injection Molded ◽

First Time

Purpose Although the feasibility and effectiveness of the fused deposition modeling (FDM) method have been proposed and developed, studies of applying this technology to various materials are still needed for researching its applicability, especially with regard to polymer blends and composites. The purpose of this paper is to study the deposition-induced effect and the effect of compatibilizers on the mechanical properties of polypropylene and polycarbonate (PP/PC) composites. Design/methodology/approach For this purpose, three different deposition modes for PP/PC composites with or without compatibilizers were used for the FDM method and tested for tensile properties. Also, parts with the same materials were made by injection molding and used for comparison. In addition, different deposition speeds were used to investigate the different deposition-induced effects. Furthermore, the behavior of the mechanical properties was clarified with scanning electron microscope images of the fracture surfaces. Findings The research results suggest that the deposition orientation has a significant influence on the mechanical behavior of PP/PC composite FDM parts. The results also indicate that there is a close relationship between the mechanical properties and morphological structures which are deeply influenced by compatibilization. Compared with injection molded parts, the ductility of the FDM parts can be dramatically improved due to the formation of fibrils and micro-fibrils by the deposition induced during processing. Originality/value This is the first paper to investigate a PP/PC composite FDM process. The results of this paper verified the applicability of PP/PC composites to FDM technology. It is also the first time that the deposition-induced effect during FDM has been investigated and studied.

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Physical and mechanical properties of injection-molded wood powder thermoplastic composites

Advanced Composite Materials ◽

10.1080/09243046.2013.843828 ◽

2013 ◽

Vol 22 (6) ◽

pp. 425-435 ◽

Cited By ~ 12

Author(s):

Ying Yu ◽

Yuqiu Yang ◽

Masuo Murakami ◽

Manabu Nomura ◽

Hiroyuki Hamada

Keyword(s):

Mechanical Properties ◽

Physical And Mechanical Properties ◽

Thermoplastic Composites ◽

Wood Powder ◽

Injection Molded ◽

Molded Wood

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Physical and Mechanical Properties of Injection Molded Co-Cr-Mo Alloy Powder for Orthopedic Applications

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1133.80 ◽

2016 ◽

Vol 1133 ◽

pp. 80-84

Author(s):

Nurhaslina Johari ◽

Rosliza Sauti ◽

Noorsyakirah Abdullah ◽

Nurazilah Mohd Zainon ◽

Bakar Meh ◽

...

Keyword(s):

Mechanical Properties ◽

Heating Rate ◽

Physical And Mechanical Properties ◽

Magnetic Behavior ◽

High Strength ◽

Extraction Process ◽

Cobalt Chromium ◽

Surgical Implants ◽

Injection Molded ◽

Superior Corrosion Resistance

Cobalt-chromium alloys are commonly used for surgical implants because of their high strength, superior corrosion resistance, non-magnetic behavior, and biocompatibility. Cobalt-Chromium-Molybdenum (Co-Cr-Mo) applications include prosthetic replacements of hips. This paper presents the attempt to produce metallic implant using Co-Cr-Mo powder by MIM process, focusing on the effects of different heating rate during sintering process at 1380°C. Co-Cr-Mo powder were mixed homogeneously with palm oil and conventional binders respectively with powder loading 65 vol% and was injection molded using vertical injection molding machine with the nozzle temperature of 160°C to produce green compacts. The binders then was removed by solvent extraction process and sintered in vacuum condition at atmosphere 10-5 mbar at temperature 1380 °C with varied heating rate; 0.5°C/min, 1.0°C/min and 3.0°C/min . Results indicated that sintered density and tensile strength varied from 8.100 gcm-3 to 8.200 gcm-3 and 546.971 MPa to 798.767 MPa respectively. The mechanical properties comply with the international standard (ASTM F75).

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Using Multi-Objective Evolutionary Algorithms to Optimize Mechanical Properties of Injection Molded Parts

International Polymer Processing ◽

10.3139/217.1889 ◽

2005 ◽

Vol 20 (3) ◽

pp. 274-285 ◽

Cited By ~ 5

Author(s):

A. Gaspar-Cunha ◽

J. C. Viana

Keyword(s):

Mechanical Properties ◽

Evolutionary Algorithms ◽

Multi Objective ◽

Molded Parts ◽

Injection Molded

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Polymer Composites Used in Rapid Prototyping Technology

Advances in Manufacturing Science and Technology ◽

10.2478/amst-2019-0003 ◽

2020 ◽

Vol 44 (1) ◽

pp. 15-20

Author(s):

Katarzyna Bulanda ◽

Mariusz Oleksy ◽

Rafał Oliwa ◽

Grzegorz Budzik ◽

Tadeusz Markowski

Keyword(s):

Mechanical Properties ◽

3D Printing ◽

Fused Deposition Modeling ◽

New Materials ◽

Fused Deposition ◽

The Matrix ◽

Molded Parts ◽

Deposition Modeling ◽

Injection Molded ◽

The Impact

AbstractNew materials and filaments dedicated to 3D printing were obtained using the fused deposition modeling method, and the properties of the produced materials were investigated. Polylactide was used as a polymer base for the assays because of the desired properties of the polymer, mainly biodegradability, and the matrix was refilled by the addition of metallic nanofillers, such as bronze, copper, brass, and steel. For the composites obtained, mechanical properties were investigated to determine the dependence of the obtained results on the content and type of filler used and on the method of fabrication of the fittings. It was found that the additives present in the polymer matrix increased the fluidity of the material. The best results were obtained for the compositions with bronze and steel in which the mass flow rate was 72.97 and 79.99 g/10 min, respectively. The filled material that had lower hardness was measured by Rockwell and the impact strength was measured by Charpy. In addition, it was found that injection-molded parts obtained much better mechanical properties than those obtained by 3D printing.

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