Comparative Study of Wear Resistance of the Composite with Microhybrid Structure and Nanocomposite

Pieniak, Daniel; Walczak, Agata; Niewczas, A.

doi:10.1515/ama-2016-0048

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…The hardness of Bi 2 O 3 on the Mohs scale is 4–5 [46], while the hardness for PI on the Mohs scale is only 1 [47]. In [48, 49], it was shown that the introduction of inorganic particles significantly increases the microhardness of polymer composites.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and radiation shielding properties of polyimide/Bi2O3 composites

Павленко

Черкашина

Yastrebinsky

2019

Heliyon

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Radiation shielding composites based on polyimide and Bi 2 O 3 were synthesized. Surface and physical-mechanical properties of polyimide/Bi 2 O 3 composites were studied. Bi 2 O 3 particles were modified by polymethylphenylsiloxane for the uniform distribution of filler in composites. This paper presents data on the production of composites in two ways: hot- and cold-pressing. The hot-pressing method for the synthesis of composites is preferable compared to the cold-pressing method (the density increases by 10–12%, and the Vickers microhardness by 10–20%). The results show that the introduction of Bi 2 O 3 significantly increases the thermal stability of the composites. At 680 °C, a polymer composite containing 10 wt% Bi 2 O 3 retains 9.7% of its mass, and at 60 wt% Bi 2 O 3 , retains 58.4%. The radiation-protective characteristics of the composites with respect to gamma radiation were evaluated by experimental and theoretical methods. High radiation-protective characteristics of the composites have been established in the gamma-quanta energy range of 0.1–1 MeV.

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Section: Resultsmentioning

confidence: 99%

Synthesis and radiation shielding properties of polyimide/Bi2O3 composites

Павленко

Черкашина

Yastrebinsky

2019

Heliyon

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“…Due to the particle size, fillers can be divided into two main groups: macro filters (particles with dimensions from 0.2 to 70 µm) and nanofillers (particles with dimensions from 0.005 to 0.04 µm). This research aims to show the influence of a hybrid nanofiller's share on the composite's selected mechanical properties [15,16].…”

Section: Methodsmentioning

confidence: 99%

“…In this way, 25 samples (5 samples for each material) were made in the form of a cylinder with a height of 10 mm and a diameter of 8 mm (Figure 2). ence of a hybrid nanofiller's share on the composite's selected mechanical properties [15,16].…”

Section: Methodsmentioning

confidence: 99%

Tests of Dental Properties of Composite Materials Containing Nanohybrid Filler

et al. 2022

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Complex composite materials are used in many areas of dentistry. Initially, chemically hardened materials were also used, and in this group nanohybrid composites are highly valued. They are often used today, mainly for the direct reconstruction of damaged hard tooth tissue materials for rebuilding damaged tissues using indirect adhesive techniques. The research was conducted to determine the mechanical properties of materials with nanofillers. The article focuses on methods of important test methods for dental prosthetics: resilience, abrasion, wear test, impact strength, hardness, SEM, and chemical analysis. As part of this work, five different series of hybrid composites with nano-fillers were tested. The mechanical properties of composites, such as compressive strength, microhardness, flexural strength, and modulus of elasticity, depend mainly on the type, particle size, and amount of filler introduced. The obtained test results showed that the type and amount of nanofiller have a significant influence on the mechanical and tribological properties. The introduction of nanofillers allowed us to obtain higher mechanical properties compared to classic materials discussed by other researchers. The study observed a change in vibrations in the IR spectrum, which allowed a comparison of the organic structures of the studied preparations.

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“…In previous works [1,61,62], it was proved that the wear of RBCs depends on the content of the filler in the matrix and its size. Generally, it can be assumed that the participation of nanoparticles in the structure of a surface layer causes strengthening and homogeneity as well as slowing down the wear process [34,63]. In addition, nanofiller particles can have a positive effect on load transfer from the matrix to the filler [19].…”

Section: Sliding Wearmentioning

confidence: 99%

Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

Pieniak

Walczak

et al. 2020

Materials

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This study discusses a quantitative fatigue evaluation of polymer–ceramic composites for dental restorations, i.e., commercial material (Filtek Z550) and experimental materials Ex-nano (G), Ex-flow (G). Their evaluation is based on the following descriptors: microhardness, scratch resistance, and sliding wear. In order to reflect factors of environmental degradation conditions, thermal fatigue was simulated with a special computer-controlled device performing algorithms of thermocycling. Specimens intended for the surface strength and wear tests underwent 104 hydrothermal fatigue cycles. Thermocycling was preceded by aging, which meant immersing the specimens in artificial saliva at 37 °C for 30 days. Microhardness tests were performed with the Vickers hardness test method. The scratch test was done with a Rockwell diamond cone indenter. Sliding ball-on-disc friction tests were performed against an alumina ball in the presence of artificial saliva. A direct positive correlation was found between thermocycling fatigue and microhardness. The dominant mechanism of the wear of the experimental composites after thermocycling is the removal of fragments of the materials in the form of flakes from the friction surface (spalling). Hydrothermal fatigue is synergistic with mechanical fatigue.

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Comparative Study of Wear Resistance of the Composite with Microhybrid Structure and Nanocomposite

Cited by 7 publications

References 19 publications

Synthesis and radiation shielding properties of polyimide/Bi2O3 composites

Synthesis and radiation shielding properties of polyimide/Bi2O3 composites

Tests of Dental Properties of Composite Materials Containing Nanohybrid Filler

Hardness and Wear Resistance of Dental Biomedical Nanomaterials in a Humid Environment with Non-Stationary Temperatures

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