填料可以是颗粒状、不连续纤维状或连续纤维状，纤维可以向一个或多个特定方

The filler may be in the form of particles, discontinuous fibers or continuous fibers, and the fibers may be oriented in one or more specific directions or may be completely oriented. It is possible to mix different fillers. For example, the combination of concrete and sandstone makes the particle size different to obtain a higher total filler volume fraction. Fine particles fill the space between large particles (Figure 1.12), resulting in a total filling volume that cannot be achieved by using a single type of filler. In another example, carbon fibers and polymer fibers are used together in polymer-based composite materials to achieve a balanced combination of high toughness (provided by polymer fibers) and high modulus (provided by carbon fibers). The two fibers can be in the same layer or in different composite material layers. When they are in the same layer, they can be in the same prepreg layer, in the same prepreg layer, or in In the same prepreg layer. An example of a mixed matrix is ​​a mixture of carbon and silicon carbide, for example, a mixture of carbon and silicon carbide obtained by pyrolysis of a mixture of a carbon precursor and a silicon carbide precursor. The mixed matrix of carbon and silicon carbide is more resistant to oxidation than the carbon matrix.

Fillers can be granular, discontinuous, or continuous fibrous, and fibers can be directed in one or more specific directions, or they can be fully oriented. Mixing with different fillers is possible. For example, concrete is used in combination with sandtod to make different degrees of granularity in order to obtain a higher total filler volume fraction. Fine particles fill the space between large particles (Figure 1.12), resulting in the total fill volume not being filled by using a single type of filler. In another example, carbon fiber and polymer fibers are used together in polymer-based composites for a balanced combination of high toughness (provided by polymer fibers) and high modulus (provided by carbon fiber). These two fibers can be in the same layer, can also be in different composite layers, when they are in the same layer, can be in the same pre-immersion layer, can also be in the same pre-immersion layer, can also be in the same pre-immersion layer. An example of a mixture of substrates is a mixture of carbon and silicon carbide, for example, a mixture of carbon and silicon carbide that is thermally dissolved from a mixture of carbon precursors and silicon carbide. The mixture of carbon and silicon carbide is more resistant to oxidation than carbon substrates.

The fillers can be granular, discontinuous or continuous, and the fibers can be oriented in one or more specific directions or fully oriented. It is possible to mix different fillers. For example, when concrete is used in combination with sand, the particle size is different to obtain a higher volume fraction of total filler. The fine particles fill the space between the large particles (Fig. 1.12), so that the total filling volume cannot be achieved by using a single type of filler. In another example, carbon fiber and polymer fiber are used together in polymer matrix composites to achieve a balanced combination of high toughness (provided by polymer fiber) and high modulus (provided by carbon fiber). These two kinds of fibers can be in the same layer, or in different composite layers. When they are in the same layer, they can be in the same prepreg layer, or in the same prepreg layer, or in the same prepreg layer. An example of a mixed matrix is a mixture of carbon and silicon carbide, for example, a mixture of carbon and silicon carbide obtained by pyrolysis of a mixture of carbon and silicon carbide precursors. The mixed matrix of carbon and silicon carbide is more resistant to oxidation than carbon matrix.