Carbon fiber is very strong in terms of chemical resistance and does not have a great sensitivity to any of the above, expect to be strong oxidizing agents. Glass fiber is comparable to carbon fiber, but is less reactive to strong bases.
Thermal conductivity is simply the ability of a material to transfer or carry heat. It is measured by the transfer rate at which heat flows through a given source (material). Higher thermal conductivity means that heat transfer will occur at a higher rate. Thermal conductivity in composites is anisotropic, meaning that heat will transfer faster in the direction of the fiber. The overall thermal conductivity is largely dependent on the volume fraction of resin to fiber and how tightly the fibers are packed together when heat transfer is taking place. It is important to note that the overall design of the composite structure plays a more important role in the thermal conductivity of the composite than the fibers themselves.
The flammability properties of these fibers indicate that they are all resistant to high temperatures. Carbon fiber and aramid are often used together as fabrics for firefighting and protective clothing. Matte glass fibers are often used in buildings to improve fire resistance. However, when used in a composite matrix, the temperature of the composite is limited by the heat capacity of the resin.
The electrical properties of a material are defined by the fiber's ability to conduct an electrical current, its resistance to an electrical current, and any shielding effects in the electromagnetic spectrum. These properties are primarily only relevant to carbon fibers. Carbon fiber is susceptible to galvanic corrosion of metal parts due to its electrical conductivity. In response, industrial applicators either bond insulated metal parts to the carbon fiber or add layers of glass fiber in the contact area to prevent this from happening. Carbon fiber presents a challenge to aerospace designers and industry as its electrical properties must be designed around and are still being researched.
Glass fiber is nearly transparent to radio waves and is non-conductive, the coating is waterproof
Chemical resistivity is the ability of a material to withstand exposure to different chemical agents over a range of pH values and how the fiber reacts over a given time frame. These are extensively tested exposing the fiber to conditions such as water (fresh and seawater), organic solvents, strong acids, strong bases, weak acids, and weak bases.
Carbon fiber is very strong in terms of chemical resistance and does not have a great sensitivity to any of the above, expect for strong oxidizing agents. Glass fiber is comparable to carbon fiber but reacts less well to strong bases.
Carbon fiber is not affected by organic solvents or oils but will degrade in the presence of strong acids, strong bases, and some oxidizing compounds. Carbon fiber should not be treated with chemicals such as bleach. Carbon fiber will also be degraded by UV radiation and sunlight.
Thermal conductivity is simply the ability of a material to transfer or carry heat. It is measured by the transfer rate at which heat flows through a given source (material). Higher thermal conductivity means that heat transfer will occur at a higher rate. Thermal conductivity in composites is anisotropic, meaning that heat will transfer faster in the direction of the fiber. The overall thermal conductivity is largely dependent on the volume fraction of resin to fiber and how tightly the fibers are packed together when heat transfer is taking place. It is important to note that the overall design of the composite structure plays a more important role in the thermal conductivity of the composite than the fibers themselves.
The flammability properties of these fibers indicate that they are all resistant to high temperatures. Carbon fiber and aramid are often used together as fabrics for firefighting and protective clothing. Matte glass fibers are often used in buildings to improve fire resistance. However, when used in a composite matrix, the temperature of the composite is limited by the heat capacity of the resin.
The electrical properties of a material are defined by the fiber's ability to conduct an electrical current, its resistance to an electrical current, and any shielding effects in the electromagnetic spectrum. These properties are primarily only relevant to carbon fibers. Carbon fiber is susceptible to galvanic corrosion of metal parts due to its electrical conductivity. In response, industrial applicators either bond insulated metal parts to the carbon fiber or add layers of glass fiber in the contact area to prevent this from happening. Carbon fiber presents a challenge to aerospace designers and industry as its electrical properties must be designed around and are still being researched.
Glass fiber is nearly transparent to radio waves and is non-conductive, the coating is waterproof
Chemical resistivity is the ability of a material to withstand exposure to different chemical agents over a range of pH values and how the fiber reacts over a given time frame. These are extensively tested exposing the fiber to conditions such as water (fresh and seawater), organic solvents, strong acids, strong bases, weak acids, and weak bases.
Carbon fiber is very strong in terms of chemical resistance and does not have a great sensitivity to any of the above, expect for strong oxidizing agents. Glass fiber is comparable to carbon fiber but reacts less well to strong bases.
Carbon fiber is not affected by organic solvents or oils but will degrade in the presence of strong acids, strong bases, and some oxidizing compounds. Carbon fiber should not be treated with chemicals such as bleach. Carbon fiber will also be degraded by UV radiation and sunlight.
Hinterlasse einen Kommentar
Diese Website ist durch hCaptcha geschützt und es gelten die allgemeinen Geschäftsbedingungen und Datenschutzbestimmungen von hCaptcha.