scholarly journals Binders Used for the Manufacturing of Composite Materials by Liquid Composite Molding

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 87
Author(s):  
Ivan V. Terekhov ◽  
Evgeniy M. Chistyakov
Keyword(s):  
Fracture Toughness ◽  
Composite Materials ◽  
Labor Cost ◽  
Liquid Composite Molding ◽  
Advantages And Disadvantages ◽  
Composites Materials ◽  
Composite Molding ◽  
Modern Methods ◽  
Improve Fracture Toughness ◽  
The 1960S

Binders, or tackifiers, have become widespread in the production of new composites materials by liquid composite molding (LCM) techniques due to their ability to stabilize preforms during laying-up and impregnation, as well as to improve fracture toughness of the obtained composites, which is very important in aviation, automotive, ship manufacturing, etc. Furthermore, they can be used in modern methods of automatic laying of dry fibers into preforms, which significantly reduces the labor cost of the manufacturing process. In this article, we review the existing research from the 1960s of the 20th century to the present days in the field of creation and properties of binders used to bond various layers of preforms in the manufacturing of composite materials by LCM methods to summarize and synthesize knowledge on these issues. Different binders based on epoxy, polyester, and a number of other resins compatible with the corresponding polymer matrices are considered in the article. The influence of binders on the preforming process, various properties of obtained preforms, including compaction, stability, and permeability, as well as the main characteristics of composite materials obtained by various LCM methods and the advantages and disadvantages of this technology have been also highlighted.

scholarly journals CURRENT STATE OF APPLIENCE ZIRCONIUM DIOXIDE IN BIOENGINEERING

2020 ◽  
Vol 4 ◽  
pp. 39-42
Author(s):  
Oksana Morozova ◽  
Edwin Gevorkyan
Keyword(s):  
Fracture Toughness ◽  
Composite Materials ◽  
Zirconium Dioxide ◽  
High Performance ◽  
Current Knowledge ◽  
High Hardness ◽  
Color Stability ◽  
Orthopedic Implants ◽  
Advantages And Disadvantages ◽  
Alternative Material

This descriptive review presents current knowledge about the bioengineering use of a zirconium dioxide, the advantages and disadvantages of the material, and the prospects for research in this direction. The work reflects the success of the practical application of the zirconium dioxide as a material for dental structures and biological implants. Such practical characteristics, such as color-stability, chemical stability, good aesthetics, biocompatibility and durability, allowed to actively use the zirconium dioxide as a material for producing various dental structures. In comparison with other ceramics, the presence of high-performance of strength and fracture toughness of the zirconium dioxide enables the use of this material as an alternative material for the reconstructions in the readings with considerable loads. High hardness determines the zirconium dioxide as an excellent material for articular prostheses, because of its hardness, provides a low level of wear and excellent biocompatibility. However, along with positive characteristics, a widespread practical problem of using the zirconium dioxide in dentistry is a chip or fracture of veneering ceramics. It has also been reported that there is a shortage of orthopedic implants such as hydrothermal stability. The solution of such problems is indicated and the use of composite materials based on the zirconium dioxide, which allows to solve a similar problem, as well as to increase the service life and reliability of orthopedic implants by providing a higher fracture toughness and mechanical strength. The existence of such composite materials based on the zirconium dioxide provides a significant increase in the wear resistance of orthopedic implants, which is essential for successful prosthetics

Liquid Composite Molding: A Widely Used Group of FRPC Processing Techniques, but still a Challenging Topic

2016 ◽  
Vol 879 ◽  
pp. 1715-1720
Author(s):  
Ralf Schledjewski ◽  
Harald Grössing
Keyword(s):  
Process Development ◽  
Flow Behavior ◽  
Process Efficiency ◽  
Liquid Composite Molding ◽  
Advantages And Disadvantages ◽  
Thermoset Resin ◽  
Reinforced Plastic ◽  
Composite Molding ◽  
Out Of Plane ◽  
Processing Techniques

Liquid Composite Molding techniques are widely used technologies in order to manufacture fiber reinforced plastic composites using near-net-shaped preforms consisting of single reinforcements, e.g. woven textiles or multiaxial fabrics. All LCM process variants have in common to impregnate and saturate dry reinforcing structures with a liquid thermoset resin system. The challenge during LCM process development and mold designing is the prevention of potential error sources for safe in-spec FRPC production. Race tracking zones and air inclusions are two major issues which need to be avoided in order to ensure an excellent FRPC quality. The knowledge about preform transmissibility, i.e. permeability, of the dry reinforcing structure to the liquid flow during the saturation phase is of major importance. The knowledge about the filling and flow behavior during FRPC processing is responsible for the process efficiency and process success. In-plane and out-of-plane permeability characterization is of great interest. Especially industry is interested in precise permeability values for numerical mold filling simulations in order to support the process development and the mold design. Industrial work is also carried out for filling strategies and textile development as well as textile improvement. The paper presents different LCM processing techniques and discusses the advantages and disadvantages as well as the linked challenges during FRPC processing. Furthermore, the in-plane permeability characterization of reinforcing structures and moreover influencing factors on the filling behavior are presented. Finally the significance of accurate and reliable permeability values according to numerical filling simulations and their validity are discussed.

scholarly journals A Review of Non-Destructive Thermography Techniques Toward Structural Integrity of Bio-Composites

2011 ◽  
Vol 471-472 ◽  
pp. 103-108 ◽  
Author(s):  
Zahra Dashtizadeh ◽  
Aidy Ali ◽  
Abdan Khalina
Keyword(s):  
Composite Materials ◽  
Structural Integrity ◽  
Destructive Testing ◽  
Advantages And Disadvantages ◽  
Composites Materials ◽  
Characterization Of Materials ◽  
Non Destructive ◽  
Food Safety And Quality

It is well known those two popular methods of testing; destructive testing based on fracture mechanics and non-destructive testing (NDT) which does not make any damage in the specimen. NDT was first used for military purpose but nowadays it is used widely in many fields such as composite materials, medical purposes, fire safety, laser welding, food safety and quality and characterization of materials. The aim of this paper is to review the recent advancement of thermography non-destructive methods especially in testing a quality of bio-composites materials. The review reveals the advantages and disadvantages of pursuing any of the available methods in NDT on bio composite materials.

Hybrid polymer composite materials. Part 2. Preparation technology

2020 ◽  
pp. 8-13
Keyword(s):  
Composite Materials ◽  
Impact Toughness ◽  
Polymer Composites ◽  
The Other ◽  
Polymer Materials ◽  
Hybrid Polymer ◽  
Preparation Technology ◽  
Advantages And Disadvantages ◽  
Hybrid Polymer Composite ◽  
The One

The main methods (pressing and winding) of the processing of hybrid polymer composites to obtain items were examined. Advantages and disadvantages of the methods were noted. Good combinations of different-module fibers (carbon, glass, boron, organic) in hybrid polymer materials are described, which allow one to prepare materials with high compression strength on the one hand, and to increase fracture energy of samples and impact toughness on the other hand.

Simulation of Reactive Liquid Composite Molding

1998 ◽  
Vol 13 (4) ◽  
pp. 389-397 ◽  
Author(s):  
C.-H. Wu ◽  
H.-T. Chiu ◽  
L. J. Lee ◽  
S. Nakamura
Keyword(s):  
Liquid Composite Molding ◽  
Composite Molding ◽  
Reactive Liquid

Modélisation viscoélastique des renforts fibreux dans les procédés de type Liquid Composite Molding (LCM)

2014 ◽  
Vol 24 (3) ◽  
pp. 367-381
Author(s):  
Mack Boris Nziengui ◽  
Hind Abdellaoui ◽  
Jamal Echaabi ◽  
Mohamed Hattabi
Keyword(s):  
Liquid Composite Molding ◽  
Composite Molding
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