Microstructure and Properties of Polymer Composites

Hajšman, Jan; Jeníček, Štěpán; Kučerová, Ludmila; Rieger, David

doi:10.21062/ujep/400.2019/a/1213-2489/mt/19/6/941

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Composite material consists of at least two components or phases which are combined in a specific way to reach unique mechanical, physical and chemical properties. There are two main types of components: matrix and the reinforcing phase [4] The corrosion resistance of the material in the non-aggressive environment of an underground repository was intended to match the corrosion protection performance of the Swedish solution while reducing the amount of copper used for the outer surface of the container.…”

Section: Methodsmentioning

confidence: 99%

Composite laser claddings for corrosion protection of outer surfaces of storage containers for spent nuclear fuel in underground repositories

Klufová¹,

Kříž²,

Duliškovič³

et al. 2021

Manufacturing Technology

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The present contribution examines the structures of and corrosion processes in copper-basalt composite laser claddings on a steel substrate. The cladding material was a laboratory-prepared mixture of the following components: Oerlikon METCO 55 (Cu > 99.9 %) and basalt powder. The metallographic structures of copper-basalt composite laser claddings were studied using optical and scanning electron microscopy. The adhesion of the claddings to the substrate was testing using the non-standardized Mercedes test. A potentiodynamic corrosion test in artificial mine water was performed on a specimen of the composite laser cladding. The test results were compared against those for a reference high-purity copper alloy C10100 and AISI 304 steel. The findings were interpreted in terms of the potential of copper-basalt composite laser claddings to be used as corrosion protection coatings on steel components in nuclear power applications.

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Section: Methodsmentioning

confidence: 99%

Composite laser claddings for corrosion protection of outer surfaces of storage containers for spent nuclear fuel in underground repositories

Klufová¹,

Kříž²,

Duliškovič³

et al. 2021

Manufacturing Technology

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“…Tensile strength examinations were implemented to determine tension pressures. The tensile properties are used to calculate elastic limit, modulus of elasticity, area reduction, elongation, and other properties [21][22][23][24]. The prepared sample's dimensions were 200 mm × 13 mm × 3.5 mm with a dog bone form, and uniaxial stress was applied/loaded on both edges of the ends.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Optimization of Tailor-Made Natural- and Synthetic-Fiber-Reinforced Epoxy-Based Composites for Lightweight Structural Applications

Tadesse,

Sinha,

Gutu Jiru

et al. 2023

J. Compos. Sci.

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Natural and synthetic fibers offer a multitude of advantages within the automotive sector, primarily due to their lightweight properties, including appealing characteristics such as adequate mechanical strength, low density, improved acoustic–thermal insulation, cost-effectiveness, and ready availability. In this study, we aimed to strengthen epoxy-based composites with natural and synthetic fibers using bamboo and glass, respectively. Additionally, the reinforcement processing of this hybrid composite material was optimized using a Taguchi L9 (nine experimental runs) orthogonal array design with linear modeling through the Design of Experiment (DoE) principles. The fibers were alkali-treated with sodium hydroxide (NaOH), and the composites were manufactured through the hand lay-up process at ambient temperature and characterized comprehensively using ASTM standard methods. The experimental results of the bamboo–glass fiber composite materials presented a significantly high tensile strength of 232.1 MPa and an optimum flexural strength of 536.33 MPa. Based on the overall Taguchi and linear modeling analysis, the NaOH treatment, fiber content, and epoxy resin concentration were optimized. These findings reveal that the ideal combination consists of 20% fiber content, 8% NaOH treatment, and 65% epoxy resin concentration. The statistical method Analysis of Variance (ANOVA) was employed to confirm the significance of these factors. The integration of the amount (%) of bamboo fiber used played a pivotal role in influencing the mechanical properties of this hybrid composite. Overall, this study demonstrates that the reinforcement of natural fiber with polymeric material composites on epoxy enhanced the composite characteristics and quality. Therefore, this bamboo–glass–epoxy-based composite can be recommended for lightweight structural applications, especially in the automotive sector, in the future.

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“…Subsequently, the comminute dried material was dosed into the cylinder and manually pressed by a rod to prevent the presence of atmospheric oxygen. [15] Preheating was carried out with a piston weighing 2,16 kg for 5 min. After this time, the nozzles were opened, and the evaluated polymer was allowed to flow freely.…”

Section: Fig 1 Meltflow Index Tester Extrusion Rheometer (1 Control mentioning

confidence: 99%

Effect of Technological Waste on Rheological Properties of the Polymer Composite

Dobránsky¹,

Pollák²,

Kočiško³

et al. 2021

Manufacturing Technology

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The production of automotive products from polymeric materials represents operations associated with the flow of material during its shaping to the desired final mold. The technological aspects of the processing of polymeric materials are closely related to the rheological properties. The article deals with adding technological waste from production to virgin material and its influence on rheological or flow properties of selected polymer composite. The analyzed material is used in the manufacture of components (connectors) in the automotive industry. The rheological properties were measured in two stages. In the first stage, rheological properties were assessed in the short term immediately after preparation of the test samples. In the second stage, half of the samples were exposed to elevated temperature and the effect of aging on the rheological properties of the material was monitored. Based on measured MVR values before exposure to elevated temperature, it can be said that the amount of process waste does not significantly affect the flow properties of the polymer. After exposure to elevated temperature, there is a significant decrease in polymer flow properties probably due to the crystallization of the macromolecular chain.

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Microstructure and Properties of Polymer Composites

Cited by 4 publications

References 4 publications

Composite laser claddings for corrosion protection of outer surfaces of storage containers for spent nuclear fuel in underground repositories

Composite laser claddings for corrosion protection of outer surfaces of storage containers for spent nuclear fuel in underground repositories

Optimization of Tailor-Made Natural- and Synthetic-Fiber-Reinforced Epoxy-Based Composites for Lightweight Structural Applications

Effect of Technological Waste on Rheological Properties of the Polymer Composite

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