scholarly journals Cutting mode impact upon output process parameters at processing of polycrystalline composite materials

2017 ◽  
Vol 2 (6) ◽  
pp. 34-38
Author(s):  
Ю. Зубарев ◽  
Yu. Zubarev ◽  
А. Приемышев ◽  
A. Priyomyshev ◽  
А. Заостровский ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Process Parameters ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Output Process ◽  
Product Surface ◽  
Required Quality ◽  
Material Cutting

The peculiarities in polymeric composite material cutting are considered. The recommendations for use of different materials for cutters, their geometry and treatment modes are offered that allows obtaining the required quality of a product surface.

scholarly journals Innovation technologies of polymeric composite materials in mechanical engineering

2017 ◽  
Vol 2 (8) ◽  
pp. 36-42 ◽  
Author(s):  
Ю. Зубарев ◽  
Yu. Zubarev ◽  
А. Приемышев ◽  
A. Priyomyshev
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Chip Formation ◽  
Mechanical Engineering ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Polymeric Composite Materials ◽  
Tool Materials ◽  
Material Cutting

The peculiarities of polymeric composite material cutting are considered: chip formation, wear of a cutter manufactured of different tool materials; forces of cutting and quality of a surface worked.

scholarly journals Synthesis and Properties of Electroconductive Polymeric Composite Material Based on Polypyrrole

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
N. S. Ilicheva ◽  
N. K. Kitaeva ◽  
V. R. Duflot ◽  
V. I. Kabanova
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Mechanical Strength ◽  
Process Parameters ◽  
Physical And Mechanical Properties ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Elastic Composite ◽  
The Relationship

A technique is proposed for obtaining electroconductive, mechanically strong, and elastic composite material based on polypyrrole and hydrophilized polyethylene. The relationship is established between the process parameters and properties of the composite material such as electroconductivity and mechanical strength. Several methods are considered in the view of increasing electroconductivity of the material. Physical and mechanical properties of the composite material are investigated.

Polymeric Composite Material for Medical Purposes

2019 ◽  
Vol 816 ◽  
pp. 250-254
Author(s):  
Dina I. Fazylova ◽  
L.A. Zenitova
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Polymeric Composite ◽  
Working Hours ◽  
Polymeric Composite Material ◽  
Polymeric Composite Materials ◽  
Impression Materials

Polymeric composite materials (PСM) on the basis of low-molecular siloxane rubber which are supposed to be used as impression materials in stomatology are developed. As fillers for creation of PСM were used: amorphous aerosil; vegetable aerosil, received from waste of a rice peel; diatomite. Researches concerned definition influence of content of filler on working hours of siloxane compositions and a complex of properties of the developed impression materials.

Conceptual imposings of quality management of system of production of composite materials for it is rocket the space equipment

2017 ◽  
Vol 14 (4) ◽  
pp. 30-38
Author(s):  
V. G. Isaev ◽  
T. N. Antipova
Keyword(s):  
Composite Materials ◽  
Quality Management ◽  
Evaluation Criteria ◽  
Criteria And Indicators ◽  
Properties Of Materials ◽  
A Priority ◽  
Required Quality

Basic provisions of the concept and methodology of production of composite materials for the missile and space equipment are offered. The system of the purposes realizing the principle of a priority of the purposes of the customer is offered. The system of evaluation criteria and indicators of quality of composite materials the realizing interrelation of requirements of the customer to quality of material and dependence of ensuring the required quality on the used technologies is developed. It is shown that for ensuring quality of composite materials for units and the RKT systems first of all it is necessary development of mathematical dependences of properties of materials on parameters of the technological modes in the conditions of obligatory implementation of requirements of the customer.

scholarly journals EFFICIENCY OF TREATMENT OF HARD TISSUES DEFECTS OF LATERAL TEETH WITH DIRECT AND INDIRECT RESTORATIONS MADE OF COMPOSITE MATERIALS: COMPARATIVE CLINICAL EVALUATION

2018 ◽  
pp. 40-46
Author(s):  
N.I. Mykyievych
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Clinical Evaluation ◽  
Secondary Caries ◽  
Posterior Teeth ◽  
Partial Restoration ◽  
Clinical Efficiency ◽  
Subgroup Ii ◽  
Direct Restoration

Introduction. Critical review of the available medical scientific sources demonstrates that despite the wide range of advantages, photopolymer composite materials have certain disadvantages. The main of those are contraction during polymerization and incomplete polymerization of the filling volume. These disadvantages cause the crevice between the direct restoration and the tooth wall, the possible discoloration can reduce tooth hardness. Some researchers recommend the application of inlays in order to prevent complications while restoring caries cavities in posterior teeth. Complete polymerization and reliable adjacency to dental tissues ensure sustainability of indirect photopolymer restoration and prevent secondary caries in restored areas. Objective. The study is aimed at raising the effectiveness of dental treatment by clinical evaluation of the quality of direct and indirect restorations made from composite materials. Methods and Materials. In order to conduct comparative clinical evaluation 90 patients with defects of coronal part of lateral teeth, aged 19-54 have been examined, who have orthognathic occlusion, don’t have dental and facial malformations or muscular and joint dysfunctions. They underwent 189 restorations of lateral teeth with cavities of O, MO, OD, MOD types due to medium or severe caries or because of dissatisfying condition of the previously inserted fillings. The patients were divided into two groups according to the method of treatment. The I (basic) group included 42 patients, who underwent 76 indirect restorations for reconstructing the defects of teeth crowns. The II (test) group included 54 patients, who underwent 113 direct restorations for reconstructing the defects of teeth crowns. Each group was subdivided into two subgroups. The patients who underwent 38 indirect restorations with photopolymer composite material Filtek Z 250 (3M ESPE) were placed in the subgroup I A, the patients who underwent 38 indirect restorations with material Charisma (Heraeus Kulzer) were placed in the subgroup I B. The patients who underwent 57 direct restorations with photopolymer composite material Filtek Z 250 (3M ESPE) were placed in the subgroup II A, the patients who underwent 56 direct restorations with material Charisma (Heraeus Kulzer) were placed in the subgroup II B. Clinical efficiency of both direct and indirect restorations was evaluated immediately after their application and then after 12 and 24 months with the help of visual and instrumental examination. When secondary caries was suspected, the target X-rays were taken with Heliodent Vario (Sirona). The evaluation was conducted according to the Ryge criteria (1998), approved by USPHS (United States Public Health Service). They include the following indicators: anatomic contour, marginal integrity and marginal coloration, secondary caries, surface texture, preservation of the restoration, restoration fracture, crevice at the edge of restoration, restoration abrasion, tooth fracture, no approximal adjacency, overhanging restoration, localized gingivitis. Results. The comparative analysis of the clinical efficiency of lateral teeth restorations made from photopolymer materials under study revealed significantly higher quality of indirect restorations (composite inlays), which demonstrated good clinical results even in long-term perspective. Only 5,3% of patients with indirect restorations (with both Filtek Z 250 and Charisma) underwent partial restoration in order to prevent further destruction. By contrast, the patients with direct restorations required the partial restoration in 7% with Filtek Z 250 and 8,9% with Charisma and needed immediate replacement of fillings in 10,5% and 17,8% correspondingly.

scholarly journals Design of a polymeric composite material femoral stem for hip joint implant

Polímeros ◽  
2019 ◽  
Vol 29 (4) ◽  
Author(s):  
Romeu Rony Cavalcante da Costa ◽  
Fellipe Roberto Biagi de Almeida ◽  
Amanda Albertin Xavier da Silva ◽  
Sandra Mara Domiciano ◽  
André Ferreira Costa Vieira
Keyword(s):  
Composite Material ◽  
Hip Joint ◽  
Femoral Stem ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Joint Implant

scholarly journals A Polymeric Composite Material (rGO/PANI) for Acid Blue 129 Adsorption

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1051 ◽  
Author(s):  
Tomasz Kukulski ◽  
Stanisław Wacławek ◽  
Daniele Silvestri ◽  
Kamil Krawczyk ◽  
Vinod V. T. Padil ◽  
...  
Keyword(s):  
Composite Material ◽  
Polymeric Composite ◽  
Cost Effective ◽  
Polymeric Composite Material ◽  
X Ray Diffraction ◽  
Reduced Graphene ◽  
Pseudo Second Order ◽  
Industrial Compounds ◽  
Acid Blue 129 ◽  
Acid Blue

Over the years, polyaniline (PANI) has received enormous attention due to its unique properties. Herein, it was chosen to develop a new polymeric composite material: reduced graphene oxide/polyaniline (rGO/PANI). The composite was prepared by a simple and cost-effective fabrication method of formation by mixing and sonication in various conditions. The obtained materials were characterized and identified using various techniques such as scanning electron microscopy (SEM), Raman and ATR–FTIR spectroscopy, and X-ray diffraction (XRD). The objective of the paper was to confirm its applicability for the removal of contaminants from water. Water could be contaminated by various types of pollutants, e.g., inorganics, heavy metals, and many other industrial compounds, including dyes. We confirmed that the Acid Blue 129 dyes can be substantially removed through adsorption on prepared rGO/PANI. The adsorption kinetic data were modeled using the pseudo-first-order and pseudo-second-order models and the adsorption isotherm model was identified.

Cranioplasty: Surgical Repair of Cranial Defects

1991 ◽  
Vol 8 (4) ◽  
pp. 247-249 ◽  
Author(s):  
Donald Leake
Keyword(s):  
Computed Tomography ◽  
Composite Material ◽  
Bone Grafting ◽  
Surgical Repair ◽  
Three Dimensional ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Complex Contour ◽  
Contour Defects

A lightweight polymeric composite material is described for use with bone grafting for the restoration of complex contour defects of the neurocranium. Custom fabrication based on three-dimensional computed tomography provides an anatomically precise reconstruction with reestablishment of the bony integrity of the skull.

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