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Anonymous users2024-02-08Composite materials: Synthetic materials with new properties composed of two or more materials with different properties through physical or chemical methods on a macroscopic or microscopic level. The composite material is divided into two parts: the matrix and the reinforcement.
Matrix material of composite materials:
The metal matrix includes: aluminum, magnesium, copper, titanium and its alloys.
Non-metallic matrices include: synthetic resin, rubber, ceramics, graphite, carbon, etc.
Reinforcements for composite materials: glass fibers, carbon fibers, boron fibers, aramid fibers, silicon carbide fibers, asbestos fibers, whiskers, wires and hard fine grains.
The composite matrix is the material used as a continuous phase in the composite material, and the matrix plays the role of bonding, balancing the load, dispersing the load, and protecting the reinforcement (fiber).
The reinforcement of the composite material plays the role of a skeleton and is used as a structure to support the composite matrix as a support for the entire composite material.
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Anonymous users2024-02-07As far as polymer composite materials are concerned, the base material is resin, and the reinforcement material is fiber, so it is natural that the fiber plays the role of the skeleton.
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Anonymous users2024-02-06Both the matrix and the reinforcement of the composite material are right.
The correct of the following statements is ( ).
a All composites consist of a matrix and a reinforcement.
b Composites may have only one chemical composition or may contain more than one.
c The matrix acts as a skeleton in the composite.
d Composite materials are classified according to the matrix, which can be divided into resin matrix composites, metal matrix composites and fiber reinforced composites.
Answer: Analysis: Because composite materials are composed of two parts, matrix and reinforcement, there are at least two chemical compositions, and item B is wrong; The matrix plays a binding role in the composite material, and the C term is wrong; Resin matrix composites and metal matrix composites are classified according to the matrix, while fiber reinforced composites are classified according to the shape of the reinforcing body, and the classification standards are not uniform, and item D is wrong.
Answer: a
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Anonymous users2024-02-05Answers]: a, c, d
According to the type of reinforcement, composite materials can be divided into three categories: granular reinforced or waiter-type, fiber-reinforced and plate-reinforced composite materials.
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Anonymous users2024-02-04Hello! The bonding forms of reinforcing materials and matrix materials in composite materials are:
1.Hot melt bonding: The reinforcing material and the matrix material are fused together by a hot melt to form a hot melt bond.
2.Solvent bonding: Reinforcement and matrix materials are mixed together by solvent binders to form solvent bonds.
3.Chemical bonding: The reinforcing material and the matrix material form chemical bonds through chemical reactions, forming a chemical bond.
4.Hot press bonding: The reinforcement material and the base material are bonded together by hot pressure to form a hot press bond.
5.Rubber bonding: The reinforcement material and the base material are bonded together by a rubber adhesive to form a rubber bond.
6.Adhesive bonding: The reinforcement and matrix materials are bonded together by adhesives to form an adhesive bond.
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Anonymous users2024-02-03Summary. Hello dear, happy to answer your <>
The role of fiber reinforcement in different types of composite materials is to play a reinforcing role in composite materials, and the material with fiber structure is fiber reinforcement. The main functions of the matrix in the fiber-reinforced resin-based material are: bonding the fiber into a whole and fixing the position of the fiber, transferring the load between the fibers, and making the load balanced; Determines some of the properties of the composite material.
The role of fiber reinforcements in different types of composites.
Hello dear, happy to answer your <>
The role of fiber reinforcement in different types of composite materials is to play a reinforcing role in composite materials, and the material with fiber structure is fiber reinforcement. The main functions of the matrix in the fiber-reinforced resin-based material are: bonding the fiber into a whole and fixing the position of the fiber, transferring the load between the fibers, and making the load balanced; Determines some of the properties of the composite material.
20.What is the method by which the nano reinforcements of metal matrix nanocomposites are added to the matrix alloy?
Metal matrix composites refer to new materials made by adding inorganic non-metal (or metal) reinforcements of different sizes and forms (including fibers, whiskers, particles, nanoparticles, etc.) to the metal matrix by artificial methods.
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Anonymous users2024-02-02Answer]: a, b, c
According to the type of matrix material, composite materials can be divided into three categories: tree belt lipid group, inorganic non-metallic material base and metal matrix composite materials, and according to the type of reinforcement, it can be divided into three categories: particle reinforcement, fiber reinforced and plate-like reinforced balance type retort reed materials.
The glass fiber epoxy resin composite materials you are talking about generally refer to glass fiber reinforced plastics, commonly known as glass fiber reinforced plastic, abbreviated as FRP or GRP in English, if I understand that there is no problem, then it is like this, glass fiber is the reinforcing material in this composite material, and epoxy resin is the matrix material of this composite material, then in the curing process, it is the matrix material The resin is transformed from a liquid state to a solid state after a chemical reaction, and the heat of chemical reaction is released in this reaction process, Then there is still a certain amount of non-solid resin after the reaction is completed, so it is necessary to carry out post-heat treatment to increase the solid content. The curing temperature you are talking about should be the temperature during the reaction, and the glass transition temperature is that after the reaction is completed, the resin has formed a solid state, and then it is heated to change both its strength and performance, especially the strength loss is very large. Then the glass transition temperature refers to the temperature at which the resin reaches the molten state of the glass after being heated in a completely solid state. >>>More
Carbon fiber is first and foremost a substance, made of carbon at a high temperature of more than 1,000 degrees in the same material as diamond. >>>More
1. ABS engineering plastics.
ABS engineering plastics are PC ABS (engineering plastic alloy), the Chinese name in the chemical industry is plastic alloy, the reason why it is named PC ABS, because this material has both the excellent heat and weather resistance of PC resin. >>>More
1. Fiberglass.
Glass fiber reinforcement is currently the most widely used material reinforcement method. According to the chemical composition, glass fiber can be divided into alkali-free aluminosilicate (referred to as alkali-free fiber) and alkali-free borosilicate (referred to as alkali-free fiber). As a reinforcing material, glass fiber has the following advantages: >>>More
Unless they are intentional, it is useless to say anything.