Technology and Mechanical Properties of Samples Obtained by Injection From Arboform L, V3 Nature Reinforced With Aramid Fibers

2014 ◽  
Author(s):  
Dumitru Nedelcu ◽  
Constantin Carausu ◽  
Ciprian Ciofu
Keyword(s):  
Mechanical Properties ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Aramid Fibers ◽  
Injection Process ◽  
Plastic Materials ◽  
Important Trend ◽  
Manufacturing Technologies

The use of recyclable materials has become an important trend in all activity areas, reason why material based on liquid wood called Arbofill, Arboblend and Arboform will replace plastic in different applications in the near future. The new materials are the main substances that have an important effect on company development and require some simple or complex manufacturing technologies. In case of Arboform L, V3 Nature the injected parts can be obtained using the same injection machines used for the injection of plastic materials. The technological injection parameters, such as: injection pressure, injection time, cooling time, mold temperature, etc., are different. The experimental research focused on tensile strength, friction coefficients, SEM analysis, XRD analysis and EDAX analysis. Considering all of these experimental results the Arboform L, V3 Nature reinforced with aramid fibers could replace the following plastic materials PA12, PVDF, ECTFE, PA66, PA12, PC, PP, PP GF 30, etc. Also taking into account all the results obtained, this material can replace plastic materials in many applications, such as: ornaments, including for cars, connectors, switches etc., electrical industry, different mobile accessories, computers, televisions, mobile phone cases, etc. The material obtained from Arboform reinforced with aramid fibers (5% percent) improved the injection process despite of easy decreasing of mechanical properties.

Transport Phenomena in "Liquid Wood" Treated with a Complex Fluid Using the Scale Relativity

2014 ◽  
Vol 1036 ◽  
pp. 77-82
Author(s):  
Elena Puiu ◽  
Dumitru Nedelcu ◽  
Lucia Vrajitoriu
Keyword(s):  
Injection Pressure ◽  
Mold Temperature ◽  
Injection Parameters ◽  
Pressure Injection ◽  
Plastic Materials ◽  
Complex Fluid ◽  
Scale Relativity ◽  
Manufacturing Technologies ◽  
Fundamental Theorems ◽  
Near Future

Materials are the main substances that have an important effect on company development and require some simple or complex manufacturing technologies. The future use of recyclable materials will become an extremely important factor in all fields of activity. Therefore, "liquid wood", due to its biodegradability and mechanical properties superior to other plastics, could replace some plastic materials in the near future. The injected parts can be obtained using the same injection machines used for the injection of plastic materials. The technological injection parameters such as: injection pressure, injection time, cooling time, mold temperature, etc. are different. A new study of transport fenomena in liquid wood treated with the complex fluid is proposed considering that the complex fluid and agents moving in continuous and non-differentiable curves (fractal curves). Within this framework, the transport equations of mass, energy and impulse are obtained and the fundamental theorems of complex fluid are established at well. In the end, our model and the classical results are correlated.

Porous AlN Ceramics Fabricated by Carbothermal Reduction

2014 ◽  
Vol 788 ◽  
pp. 627-631
Author(s):  
Yuan Lu ◽  
Jing Long Li ◽  
Jian Feng Yang ◽  
Peng Li
Keyword(s):  
Mechanical Properties ◽  
Carbothermal Reduction ◽  
Glass Phase ◽  
Sintering Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
High Porosity ◽  
Sintering Additives ◽  
Fine Microstructure ◽  
Complete Formation

A new method for preparing porous AlN ceramics with high porosity had been developed by carbothermal reduction of die-pressed green bodies composed of alumina, carbon, sintering additives and AlN seeds. The influences of sintering additives and sintering temperature on the microstructure and mechanical properties of porous AlN ceramics were investigated. XRD analysis proved that complete formation of AlN phase except for minor of glass phase. SEM analysis showed that the resultant porous AlN ceramics occupied fine microstructure and a uniform pore structure. Porous AlN ceramics with a porosity of 41~66% and a strength of 2.7~ 51.8 MPa were obtained.

scholarly journals Effect of 10% Zn Addition on Fabrication of Al Alloys on Mechanical Properties, Crystal Structure and Micro Structure

2019 ◽  
pp. 578-582
Author(s):  
Indah Juriani ◽  
Kerista Sebayang ◽  
Prof Muljadi
Keyword(s):  
Mechanical Properties ◽  
Sintering Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Al Alloys ◽  
Solid Solution Phase ◽  
Powder Metallurgy Method ◽  
Micro Structure ◽  
Zn Addition ◽  
Form Solid Solution

Aluminum-based alloy are one of the most alloy beneficial in the industry. Therefore, the research is done on the effect of Zn addition on Al alloys fabrication using powder metallurgy method. The composition of 0% and 10% Zn with sintering temperature varied: 550oC, 600oC, and 650oC respectively at that temperature held for 1 hour. Characterization includes: measurement of hardness, SEM analysis, and XRD analysis. The result of XRD analysis from the results of the rietveld refinement phase using the match program it is found several phases is Al, Zn and ZnO. From the result of SEM analysis it is found that the reaction between Zn and Al so as to form solid solution phase on the addition of 10% Zn with 650oC sintering temperature. From the result of characteristic of mechanical properties, the highest hardness is 99,5 HD at 10% Zn addition for all sintering temperatures. With the addition of Zn the mechanical properties is increasing.

Fabrication of Porous Silicon Nitride with High Porosity

2007 ◽  
Vol 336-338 ◽  
pp. 1105-1108 ◽  
Author(s):  
Shao Yun Shan ◽  
Jian Feng Yang ◽  
Ji Qiang Gao ◽  
Wen Hui Zhang ◽  
Zhi Hao Jin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Xrd Analysis ◽  
Reduction Reaction ◽  
Sem Analysis ◽  
High Porosity ◽  
Sintering Additive ◽  
Fine Microstructure ◽  
Porous Si3n4 ◽  
Si3n4 Ceramics ◽  
Porous Si3n4 Ceramics

In this study, porous Si3N4 ceramics were fabricated by carbothermal reduction reaction between silicon dioxide and carbon. The influences of different starting powders and sintering additives on microstructure and mechanical properties were investigated. XRD analysis demonstrated the formation of single-phase β-Si3N4 except for glass phase and minor of α-Si3N4 phase. SEM analysis showed that the resultant porous Si3N4 ceramics occupied fine microstructure and uniform pore structure. The samples with fine starting powder showed fine, high aspect ratio of β-Si3N4 grains and good mechanical properties. The addition of Al2O3 accelerated the densification of porous Si3N4 ceramics. With an increasing in the sintering additive content, the porosity decreased, the flexural strength increased.

scholarly journals Effect of Superheated Steam Treatment on the Mechanical Properties and Dimensional Stability of PALF/PLA Biocomposite

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 482 ◽  
Author(s):  
Ahmed Challabi ◽  
Buong Chieng ◽  
Nor Ibrahim ◽  
Hidayah Ariffin ◽  
Norhazlin Zainuddin
Keyword(s):  
Mechanical Properties ◽  
Dimensional Stability ◽  
Interfacial Adhesion ◽  
Superheated Steam ◽  
Weight Ratio ◽  
Xrd Analysis ◽  
Treatment Method ◽  
Sem Analysis ◽  
Steam Treatment ◽  
Different Temperatures

The effectiveness of superheated steam (SHS) as an alternative, eco-friendly treatment method to modify the surface of pineapple leaf fiber (PALF) for biocomposite applications was investigated. The aim of this treatment was to improve the interfacial adhesion between the fiber and the polymer. The treatment was carried out in an SHS oven for different temperatures (190–230 °C) and times (30–120 min). Biocomposites fabricated from SHS-treated PALFs and polylactic acid (PLA) at a weight ratio of 30:70 were prepared via melt-blending techniques. The mechanical properties, dimensional stability, scanning electron microscopy (SEM), and X-ray diffraction (XRD) for the biocomposites were evaluated. Results showed that treatment at temperature of 220 °C for 60 min gave the optimum tensile properties compared to other treatment temperatures. The tensile, flexural, and impact properties as well as the dimensional stability of the biocomposites were enhanced by the presence of SHS-treated PALF. The SEM analysis showed improvement in the interfacial adhesion between PLA and SHS-treated PALF. XRD analysis showed an increase in the crystallinity with the addition of SHS-PALF. The results suggest that SHS can be used as an environmentally friendly treatment method for the modification of PALF in biocomposite production.

scholarly journals Welding lines formation in holes obtained by low pressure injection molding of ceramic parts

Cerâmica ◽  
2018 ◽  
Vol 64 (369) ◽  
pp. 97-103 ◽  
Author(s):  
C. A. Costa ◽  
A. F. Michels ◽  
M. E. Kipper
Keyword(s):  
Injection Molding ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Low Pressure ◽  
Process Conditions ◽  
Injection Mold ◽  
Extraction Temperature ◽  
Post Injection ◽  
Injection Process ◽  
Pressure Injection

Abstract This work presents a study to evaluate the process of producing internal holes in ceramic disks produced by low pressure injection molding (LPIM) process. Two process conditions defined as pre-injection and post-injection were used to test the proposition. In the first one the pin cores that produce the holes were positioned in the cavity before the injection of the feedstock; and in the second one, the pin cores were positioned in the cavity, just after the feeding phase of the injection mold. An experimental injection mold designed and manufactured to test both processes was developed to produce ceramic disk with Ø 50 x 2 mm with four holes of Ø 5 mm, equally and radially distributed through the disk. The feedstock was composed of 86 wt% alumina (Al2O3) and 14 wt% organic vehicle based on paraffin wax. Heating and cooling systems controlled by a data acquisition system were included in the mold. The results showed that there were no welding lines with the post-injection process, proving to be an option for creating holes in the ceramic parts produced by LPIM. It was observed that best results were obtained at 58 °C mold temperature. The pins extraction temperature was about 45 °C, and the injection pressure was 170 kPa.

scholarly journals The influence of microstructure on mechanical properties of 3D printable geopolymer composites

2020 ◽  
Vol 322 ◽  
pp. 01011
Author(s):  
Kinga Korniejenko ◽  
Krzysztof Miernik ◽  
Wei-Ting Lin ◽  
Arnaud Castel
Keyword(s):  
Mechanical Properties ◽  
Microstructural Analysis ◽  
Ceramic Materials ◽  
Production Method ◽  
Industrial Sector ◽  
Sem Analysis ◽  
Raw Material ◽  
Material Structure ◽  
The Matrix ◽  
Manufacturing Technologies

The additive manufacturing technologies are fast-developing industrial sector and, potentially, a ground-breaking technology. They have many advantages such as the saving of resources and energy efficiency. However, the full exploitation of 3D printing technology for ceramic materials is currently limited; a lot of research is being conducted in this area. A promising solution seems to be geopolymers, but its application requires a better understanding of the behaviour this group of materials. This article analyses the influence of microstructure on mechanical properties whilst taking the production method into consideration. The paper is based on comparative analysis – the investigation is focused on the influence of material structure on the mechanical properties and fracture mechanism of these kinds of composites, including those reinforced with different kind of fibres. As a raw material for the matrix, fly ash from the Skawina coal power plant (located in: Skawina, Lesser Poland, Poland) was used. The investigation was made by SEM analysis. The results show that the microstructural analysis did not sufficiently explain the underlying reasons for the observed differences in the mechanical properties of the composites.

Thermoelectric and Mechanical Properties of Ca0.9Yb0.1MnO3 Based Materials

2007 ◽  
Vol 1044 ◽  
Author(s):  
Atsuko Kosuga ◽  
Saori Urata ◽  
Ryoji Funahashi
Keyword(s):  
Mechanical Properties ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Metallic Silver ◽  
Wet Milling ◽  
X Ray Diffraction ◽  
Thermoelectric Oxide ◽  
X Ray ◽  
Ag Particles ◽  
Two Phases

AbstractThe Ca0.9Yb0.1MnO3/Ag composites(the ratio of Ag to Ca0.9Yb0.1MnO3 was 0, 4.7, 9.4, and 18.8 wt %) were prepared by wet milling various amounts of Ca0.9Yb0.1MnO3 and Ag2O powder mixtures followed by sintering in order to improve the mechanical properties of Ca0.9Yb0.1MnO3 for n-type legs of thermoelectric oxide devices. The obtained composites consisted of two phases such as Ca0.9Yb0.1MnO3 and metallic silver from the X-ray diffraction (XRD) analysis. The scanning electron microscope (SEM) analysis indicated that the Ag particles, the size of which was within 5 μm, were homogeneously dispersed in Ca0.9Yb0.1MnO3 matrix for all the composites. The σf of 18.8 wt% Ag composite became 251 MPa, which was 2 times larger value than that of Ca0.9Yb0.1MnO3. The power factor (S2ρ) was slightly improved by the addition of silver particles. The maximum S2ρ, i.e. 0.26 mWm-1K-2 at 573 K was obtained for 18.8 wt% Ag composite.

Effect of Process Parameters on Mechanical Properties of Carbon Fiber Reinforced ABS Composites

2019 ◽  
Vol 815 ◽  
pp. 145-150
Author(s):  
Yu Xin Dong ◽  
Quan Wang ◽  
Chong Ying Yang ◽  
Wen Zhe Xu ◽  
Shuo Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Tensile Stress ◽  
Process Parameters ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Carbon Fiber Composites ◽  
Melt Temperature ◽  
Twin Screw ◽  
Power Content

In this paper, the carbon fiber and ABS composites were prepared in different carbon fiber power mass percent by the twin screw extruder. The mechanical properties of the ABS/CF composites were studied in different process parameters by injection molding. The influence of mold temperature, melt temperature, packing pressure and injection pressure on the mechanical properties was analyzed in different carbon fiber composites. The results show that with the content of carbon fiber increase, the tensile stress of the composite materials also increase. The effect of different carbon fiber power content on tensile stress is greater compared with process parameters.

Porous TiN Ceramics Fabricated by Carbothermal Reduction Method

2013 ◽  
Vol 745-746 ◽  
pp. 667-672 ◽  
Author(s):  
Yuan Lu ◽  
Jian Feng Yang ◽  
Zhi Liang Chen ◽  
Jian Jun Han ◽  
Jing Jing Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Pore Structure ◽  
Carbothermal Reduction ◽  
Xrd Analysis ◽  
Linear Shrinkage ◽  
Reduction Reaction ◽  
Sem Analysis ◽  
High Porosity ◽  
Microstructure And Mechanical Properties

Porous TiN ceramics with high porosity and uniform pore structure was prepared following the carbothermal reduction reaction between TiO2 and carbon. Influences of sintering additives and particle size of TiO2 on the microstructure and mechanical properties of porous TiN ceramics were investigated. Microstructure and mechanical properties of porous TiN ceramics were studied by XRD, SEM and three-point bending measurement. XRD analysis proved that the TiN phase has completely formed after reaction. In addition, SEM analysis showed that the resultant porous TiN ceramics were composed of fine grains with uniform pore structure. The addition of La2O3 not only accelerated the densification of porous TiN ceramics, but also decreased the porosity and increased the flexural strength. With a decrease in TiO2 particle size, the linear shrinkage increased and the porosity decreased accordingly.

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